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org.apache.cassandra.db.compaction.CompactionManager Maven / Gradle / Ivy
A fork of the Apache Cassandra Project ready to embed Elasticsearch.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.db.compaction;
import java.io.File;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.TabularData;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.*;
import com.google.common.primitives.Ints;
import com.google.common.util.concurrent.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import io.netty.util.concurrent.FastThreadLocal;
import org.apache.cassandra.cache.AutoSavingCache;
import org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor;
import org.apache.cassandra.concurrent.JMXEnabledThreadPoolExecutor;
import org.apache.cassandra.concurrent.NamedThreadFactory;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.db.*;
import org.apache.cassandra.db.compaction.CompactionInfo.Holder;
import org.apache.cassandra.db.lifecycle.LifecycleTransaction;
import org.apache.cassandra.db.lifecycle.SSTableIntervalTree;
import org.apache.cassandra.db.lifecycle.SSTableSet;
import org.apache.cassandra.db.lifecycle.View;
import org.apache.cassandra.db.rows.UnfilteredRowIterator;
import org.apache.cassandra.db.view.ViewBuilder;
import org.apache.cassandra.dht.Bounds;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.index.SecondaryIndexBuilder;
import org.apache.cassandra.io.sstable.Descriptor;
import org.apache.cassandra.io.sstable.ISSTableScanner;
import org.apache.cassandra.io.sstable.IndexSummaryRedistribution;
import org.apache.cassandra.io.sstable.SSTableRewriter;
import org.apache.cassandra.io.sstable.SnapshotDeletingTask;
import org.apache.cassandra.io.sstable.format.SSTableReader;
import org.apache.cassandra.io.sstable.format.SSTableWriter;
import org.apache.cassandra.io.sstable.metadata.MetadataCollector;
import org.apache.cassandra.io.util.FileUtils;
import org.apache.cassandra.metrics.CompactionMetrics;
import org.apache.cassandra.repair.Validator;
import org.apache.cassandra.schema.CompactionParams.TombstoneOption;
import org.apache.cassandra.service.ActiveRepairService;
import org.apache.cassandra.service.StorageService;
import org.apache.cassandra.utils.*;
import org.apache.cassandra.utils.concurrent.Refs;
import static java.util.Collections.singleton;
/**
*
* A singleton which manages a private executor of ongoing compactions.
*
* Scheduling for compaction is accomplished by swapping sstables to be compacted into
* a set via Tracker. New scheduling attempts will ignore currently compacting
* sstables.
*/
public class CompactionManager implements CompactionManagerMBean
{
public static final String MBEAN_OBJECT_NAME = "org.apache.cassandra.db:type=CompactionManager";
private static final Logger logger = LoggerFactory.getLogger(CompactionManager.class);
public static final CompactionManager instance;
public static final int NO_GC = Integer.MIN_VALUE;
public static final int GC_ALL = Integer.MAX_VALUE;
// A thread local that tells us if the current thread is owned by the compaction manager. Used
// by CounterContext to figure out if it should log a warning for invalid counter shards.
public static final FastThreadLocal isCompactionManager = new FastThreadLocal()
{
@Override
protected Boolean initialValue()
{
return false;
}
};
static
{
instance = new CompactionManager();
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
try
{
mbs.registerMBean(instance, new ObjectName(MBEAN_OBJECT_NAME));
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
private final CompactionExecutor executor = new CompactionExecutor();
private final CompactionExecutor validationExecutor = new ValidationExecutor();
private final static CompactionExecutor cacheCleanupExecutor = new CacheCleanupExecutor();
private final CompactionMetrics metrics = new CompactionMetrics(executor, validationExecutor);
private final Multiset compactingCF = ConcurrentHashMultiset.create();
private final RateLimiter compactionRateLimiter = RateLimiter.create(Double.MAX_VALUE);
/**
* Gets compaction rate limiter.
* Rate unit is bytes per sec.
*
* @return RateLimiter with rate limit set
*/
public RateLimiter getRateLimiter()
{
setRate(DatabaseDescriptor.getCompactionThroughputMbPerSec());
return compactionRateLimiter;
}
/**
* Sets the rate for the rate limiter. When compaction_throughput_mb_per_sec is 0 or node is bootstrapping,
* this sets the rate to Double.MAX_VALUE bytes per second.
* @param throughPutMbPerSec throughput to set in mb per second
*/
public void setRate(final double throughPutMbPerSec)
{
double throughput = throughPutMbPerSec * 1024.0 * 1024.0;
// if throughput is set to 0, throttling is disabled
if (throughput == 0 || StorageService.instance.isBootstrapMode())
throughput = Double.MAX_VALUE;
if (compactionRateLimiter.getRate() != throughput)
compactionRateLimiter.setRate(throughput);
}
/**
* Call this whenever a compaction might be needed on the given columnfamily.
* It's okay to over-call (within reason) if a call is unnecessary, it will
* turn into a no-op in the bucketing/candidate-scan phase.
*/
public List> submitBackground(final ColumnFamilyStore cfs)
{
if (cfs.isAutoCompactionDisabled())
{
logger.trace("Autocompaction is disabled");
return Collections.emptyList();
}
int count = compactingCF.count(cfs);
if (count > 0 && executor.getActiveCount() >= executor.getMaximumPoolSize())
{
logger.trace("Background compaction is still running for {}.{} ({} remaining). Skipping",
cfs.keyspace.getName(), cfs.name, count);
return Collections.emptyList();
}
logger.trace("Scheduling a background task check for {}.{} with {}",
cfs.keyspace.getName(),
cfs.name,
cfs.getCompactionStrategyManager().getName());
List> futures = new ArrayList<>(1);
Future fut = executor.submitIfRunning(new BackgroundCompactionCandidate(cfs), "background task");
if (!fut.isCancelled())
{
compactingCF.add(cfs);
futures.add(fut);
}
return futures;
}
public boolean isCompacting(Iterable cfses)
{
for (ColumnFamilyStore cfs : cfses)
if (!cfs.getTracker().getCompacting().isEmpty())
return true;
return false;
}
/**
* Shutdowns both compaction and validation executors, cancels running compaction / validation,
* and waits for tasks to complete if tasks were not cancelable.
*/
public void forceShutdown()
{
// shutdown executors to prevent further submission
executor.shutdown();
validationExecutor.shutdown();
// interrupt compactions and validations
for (Holder compactionHolder : CompactionMetrics.getCompactions())
{
compactionHolder.stop();
}
// wait for tasks to terminate
// compaction tasks are interrupted above, so it shuold be fairy quick
// until not interrupted tasks to complete.
for (ExecutorService exec : Arrays.asList(executor, validationExecutor))
{
try
{
if (!exec.awaitTermination(1, TimeUnit.MINUTES))
logger.warn("Failed to wait for compaction executors shutdown");
}
catch (InterruptedException e)
{
logger.error("Interrupted while waiting for tasks to be terminated", e);
}
}
}
public void finishCompactionsAndShutdown(long timeout, TimeUnit unit) throws InterruptedException
{
executor.shutdown();
executor.awaitTermination(timeout, unit);
}
// the actual sstables to compact are not determined until we run the BCT; that way, if new sstables
// are created between task submission and execution, we execute against the most up-to-date information
class BackgroundCompactionCandidate implements Runnable
{
private final ColumnFamilyStore cfs;
BackgroundCompactionCandidate(ColumnFamilyStore cfs)
{
this.cfs = cfs;
}
public void run()
{
try
{
logger.trace("Checking {}.{}", cfs.keyspace.getName(), cfs.name);
if (!cfs.isValid())
{
logger.trace("Aborting compaction for dropped CF");
return;
}
CompactionStrategyManager strategy = cfs.getCompactionStrategyManager();
AbstractCompactionTask task = strategy.getNextBackgroundTask(getDefaultGcBefore(cfs, FBUtilities.nowInSeconds()));
if (task == null)
{
logger.trace("No tasks available");
return;
}
task.execute(metrics);
}
finally
{
compactingCF.remove(cfs);
}
submitBackground(cfs);
}
}
/**
* Run an operation over all sstables using jobs threads
*
* @param cfs the column family store to run the operation on
* @param operation the operation to run
* @param jobs the number of threads to use - 0 means use all available. It never uses more than concurrent_compactors threads
* @return status of the operation
* @throws ExecutionException
* @throws InterruptedException
*/
@SuppressWarnings("resource")
private AllSSTableOpStatus parallelAllSSTableOperation(final ColumnFamilyStore cfs, final OneSSTableOperation operation, int jobs, OperationType operationType) throws ExecutionException, InterruptedException
{
List transactions = new ArrayList<>();
try (LifecycleTransaction compacting = cfs.markAllCompacting(operationType))
{
if (compacting == null)
return AllSSTableOpStatus.UNABLE_TO_CANCEL;
Iterable sstables = Lists.newArrayList(operation.filterSSTables(compacting));
if (Iterables.isEmpty(sstables))
{
logger.info("No sstables to {} for {}.{}", operationType.name(), cfs.keyspace.getName(), cfs.name);
return AllSSTableOpStatus.SUCCESSFUL;
}
List> futures = new ArrayList<>();
for (final SSTableReader sstable : sstables)
{
final LifecycleTransaction txn = compacting.split(singleton(sstable));
transactions.add(txn);
Callable callable = new Callable()
{
@Override
public Object call() throws Exception
{
operation.execute(txn);
return this;
}
};
Future fut = executor.submitIfRunning(callable, "paralell sstable operation");
if (!fut.isCancelled())
futures.add(fut);
else
return AllSSTableOpStatus.ABORTED;
if (jobs > 0 && futures.size() == jobs)
{
FBUtilities.waitOnFutures(futures);
futures.clear();
}
}
FBUtilities.waitOnFutures(futures);
assert compacting.originals().isEmpty();
return AllSSTableOpStatus.SUCCESSFUL;
}
finally
{
Throwable fail = Throwables.close(null, transactions);
if (fail != null)
logger.error("Failed to cleanup lifecycle transactions {}", fail);
}
}
private static interface OneSSTableOperation
{
Iterable filterSSTables(LifecycleTransaction transaction);
void execute(LifecycleTransaction input) throws IOException;
}
public enum AllSSTableOpStatus
{
SUCCESSFUL(0),
ABORTED(1),
UNABLE_TO_CANCEL(2);
public final int statusCode;
AllSSTableOpStatus(int statusCode)
{
this.statusCode = statusCode;
}
}
public AllSSTableOpStatus performScrub(final ColumnFamilyStore cfs, final boolean skipCorrupted, final boolean checkData, int jobs)
throws InterruptedException, ExecutionException
{
return parallelAllSSTableOperation(cfs, new OneSSTableOperation()
{
@Override
public Iterable filterSSTables(LifecycleTransaction input)
{
return input.originals();
}
@Override
public void execute(LifecycleTransaction input) throws IOException
{
scrubOne(cfs, input, skipCorrupted, checkData);
}
}, jobs, OperationType.SCRUB);
}
public AllSSTableOpStatus performVerify(final ColumnFamilyStore cfs, final boolean extendedVerify) throws InterruptedException, ExecutionException
{
assert !cfs.isIndex();
return parallelAllSSTableOperation(cfs, new OneSSTableOperation()
{
@Override
public Iterable filterSSTables(LifecycleTransaction input)
{
return input.originals();
}
@Override
public void execute(LifecycleTransaction input) throws IOException
{
verifyOne(cfs, input.onlyOne(), extendedVerify);
}
}, 0, OperationType.VERIFY);
}
public AllSSTableOpStatus performSSTableRewrite(final ColumnFamilyStore cfs, final boolean excludeCurrentVersion, int jobs) throws InterruptedException, ExecutionException
{
return parallelAllSSTableOperation(cfs, new OneSSTableOperation()
{
@Override
public Iterable filterSSTables(LifecycleTransaction transaction)
{
Iterable sstables = new ArrayList<>(transaction.originals());
Iterator iter = sstables.iterator();
while (iter.hasNext())
{
SSTableReader sstable = iter.next();
if (excludeCurrentVersion && sstable.descriptor.version.equals(sstable.descriptor.getFormat().getLatestVersion()))
{
transaction.cancel(sstable);
iter.remove();
}
}
return sstables;
}
@Override
public void execute(LifecycleTransaction txn)
{
AbstractCompactionTask task = cfs.getCompactionStrategyManager().getCompactionTask(txn, NO_GC, Long.MAX_VALUE);
task.setUserDefined(true);
task.setCompactionType(OperationType.UPGRADE_SSTABLES);
task.execute(metrics);
}
}, jobs, OperationType.UPGRADE_SSTABLES);
}
public AllSSTableOpStatus performCleanup(final ColumnFamilyStore cfStore, int jobs) throws InterruptedException, ExecutionException
{
assert !cfStore.isIndex();
Keyspace keyspace = cfStore.keyspace;
if (!StorageService.instance.isJoined())
{
logger.info("Cleanup cannot run before a node has joined the ring");
return AllSSTableOpStatus.ABORTED;
}
final Collection> ranges = StorageService.instance.getLocalRanges(keyspace.getName());
if (ranges.isEmpty())
{
logger.info("Node owns no data for keyspace {}", keyspace.getName());
return AllSSTableOpStatus.SUCCESSFUL;
}
final boolean hasIndexes = cfStore.indexManager.hasIndexes();
return parallelAllSSTableOperation(cfStore, new OneSSTableOperation()
{
@Override
public Iterable filterSSTables(LifecycleTransaction transaction)
{
List sortedSSTables = Lists.newArrayList(transaction.originals());
Collections.sort(sortedSSTables, SSTableReader.sizeComparator);
return sortedSSTables;
}
@Override
public void execute(LifecycleTransaction txn) throws IOException
{
CleanupStrategy cleanupStrategy = CleanupStrategy.get(cfStore, ranges, FBUtilities.nowInSeconds());
doCleanupOne(cfStore, txn, cleanupStrategy, ranges, hasIndexes);
}
}, jobs, OperationType.CLEANUP);
}
public AllSSTableOpStatus performGarbageCollection(final ColumnFamilyStore cfStore, TombstoneOption tombstoneOption, int jobs) throws InterruptedException, ExecutionException
{
assert !cfStore.isIndex();
return parallelAllSSTableOperation(cfStore, new OneSSTableOperation()
{
@Override
public Iterable filterSSTables(LifecycleTransaction transaction)
{
Iterable originals = transaction.originals();
if (cfStore.getCompactionStrategyManager().onlyPurgeRepairedTombstones())
originals = Iterables.filter(originals, SSTableReader::isRepaired);
List sortedSSTables = Lists.newArrayList(originals);
Collections.sort(sortedSSTables, SSTableReader.maxTimestampComparator);
return sortedSSTables;
}
@Override
public void execute(LifecycleTransaction txn) throws IOException
{
logger.debug("Garbage collecting {}", txn.originals());
CompactionTask task = new CompactionTask(cfStore, txn, getDefaultGcBefore(cfStore, FBUtilities.nowInSeconds()))
{
@Override
protected CompactionController getCompactionController(Set toCompact)
{
return new CompactionController(cfStore, toCompact, gcBefore, null, tombstoneOption);
}
};
task.setUserDefined(true);
task.setCompactionType(OperationType.GARBAGE_COLLECT);
task.execute(metrics);
}
}, jobs, OperationType.GARBAGE_COLLECT);
}
public AllSSTableOpStatus relocateSSTables(final ColumnFamilyStore cfs, int jobs) throws ExecutionException, InterruptedException
{
if (!cfs.getPartitioner().splitter().isPresent())
{
logger.info("Partitioner does not support splitting");
return AllSSTableOpStatus.ABORTED;
}
final Collection> r = StorageService.instance.getLocalRanges(cfs.keyspace.getName());
if (r.isEmpty())
{
logger.info("Relocate cannot run before a node has joined the ring");
return AllSSTableOpStatus.ABORTED;
}
final List> localRanges = Range.sort(r);
final Directories.DataDirectory[] locations = cfs.getDirectories().getWriteableLocations();
final List diskBoundaries = StorageService.getDiskBoundaries(localRanges, cfs.getPartitioner(), locations);
return parallelAllSSTableOperation(cfs, new OneSSTableOperation()
{
@Override
public Iterable filterSSTables(LifecycleTransaction transaction)
{
Set originals = Sets.newHashSet(transaction.originals());
Set needsRelocation = originals.stream().filter(s -> !inCorrectLocation(s)).collect(Collectors.toSet());
transaction.cancel(Sets.difference(originals, needsRelocation));
Map> groupedByDisk = needsRelocation.stream().collect(Collectors.groupingBy((s) ->
CompactionStrategyManager.getCompactionStrategyIndex(cfs, cfs.getDirectories(), s)));
int maxSize = 0;
for (List diskSSTables : groupedByDisk.values())
maxSize = Math.max(maxSize, diskSSTables.size());
List mixedSSTables = new ArrayList<>();
for (int i = 0; i < maxSize; i++)
for (List diskSSTables : groupedByDisk.values())
if (i < diskSSTables.size())
mixedSSTables.add(diskSSTables.get(i));
return mixedSSTables;
}
private boolean inCorrectLocation(SSTableReader sstable)
{
if (!cfs.getPartitioner().splitter().isPresent())
return true;
int directoryIndex = CompactionStrategyManager.getCompactionStrategyIndex(cfs, cfs.getDirectories(), sstable);
Directories.DataDirectory[] locations = cfs.getDirectories().getWriteableLocations();
Directories.DataDirectory location = locations[directoryIndex];
PartitionPosition diskLast = diskBoundaries.get(directoryIndex);
// the location we get from directoryIndex is based on the first key in the sstable
// now we need to make sure the last key is less than the boundary as well:
return sstable.descriptor.directory.getAbsolutePath().startsWith(location.location.getAbsolutePath()) && sstable.last.compareTo(diskLast) <= 0;
}
@Override
public void execute(LifecycleTransaction txn)
{
logger.debug("Relocating {}", txn.originals());
AbstractCompactionTask task = cfs.getCompactionStrategyManager().getCompactionTask(txn, NO_GC, Long.MAX_VALUE);
task.setUserDefined(true);
task.setCompactionType(OperationType.RELOCATE);
task.execute(metrics);
}
}, jobs, OperationType.RELOCATE);
}
public ListenableFuture submitAntiCompaction(final ColumnFamilyStore cfs,
final Collection> ranges,
final Refs sstables,
final long repairedAt,
final UUID parentRepairSession)
{
Runnable runnable = new WrappedRunnable()
{
@Override
@SuppressWarnings("resource")
public void runMayThrow() throws Exception
{
LifecycleTransaction modifier = null;
while (modifier == null)
{
for (SSTableReader compactingSSTable : cfs.getTracker().getCompacting())
sstables.releaseIfHolds(compactingSSTable);
Set compactedSSTables = new HashSet<>();
for (SSTableReader sstable : sstables)
if (sstable.isMarkedCompacted())
compactedSSTables.add(sstable);
sstables.release(compactedSSTables);
modifier = cfs.getTracker().tryModify(sstables, OperationType.ANTICOMPACTION);
}
performAnticompaction(cfs, ranges, sstables, modifier, repairedAt, parentRepairSession);
}
};
ListenableFuture ret = null;
try
{
ret = executor.submitIfRunning(runnable, "anticompaction");
return ret;
}
finally
{
if (ret == null || ret.isCancelled())
sstables.release();
}
}
/**
* Make sure the {validatedForRepair} are marked for compaction before calling this.
*
* Caller must reference the validatedForRepair sstables (via ParentRepairSession.getActiveRepairedSSTableRefs(..)).
*
* @param cfs
* @param ranges Ranges that the repair was carried out on
* @param validatedForRepair SSTables containing the repaired ranges. Should be referenced before passing them.
* @param parentRepairSession parent repair session ID
* @throws InterruptedException
* @throws IOException
*/
public void performAnticompaction(ColumnFamilyStore cfs,
Collection> ranges,
Refs validatedForRepair,
LifecycleTransaction txn,
long repairedAt,
UUID parentRepairSession) throws InterruptedException, IOException
{
logger.info("[repair #{}] Starting anticompaction for {}.{} on {}/{} sstables", parentRepairSession, cfs.keyspace.getName(), cfs.getTableName(), validatedForRepair.size(), cfs.getLiveSSTables());
logger.trace("[repair #{}] Starting anticompaction for ranges {}", parentRepairSession, ranges);
Set sstables = new HashSet<>(validatedForRepair);
Set mutatedRepairStatuses = new HashSet<>();
// we should only notify that repair status changed if it actually did:
Set mutatedRepairStatusToNotify = new HashSet<>();
Map wasRepairedBefore = new HashMap<>();
for (SSTableReader sstable : sstables)
wasRepairedBefore.put(sstable, sstable.isRepaired());
Set nonAnticompacting = new HashSet<>();
Iterator sstableIterator = sstables.iterator();
try
{
List> normalizedRanges = Range.normalize(ranges);
while (sstableIterator.hasNext())
{
SSTableReader sstable = sstableIterator.next();
Range sstableRange = new Range<>(sstable.first.getToken(), sstable.last.getToken());
boolean shouldAnticompact = false;
for (Range r : normalizedRanges)
{
if (r.contains(sstableRange))
{
logger.info("[repair #{}] SSTable {} fully contained in range {}, mutating repairedAt instead of anticompacting", parentRepairSession, sstable, r);
sstable.descriptor.getMetadataSerializer().mutateRepairedAt(sstable.descriptor, repairedAt);
sstable.reloadSSTableMetadata();
mutatedRepairStatuses.add(sstable);
if (!wasRepairedBefore.get(sstable))
mutatedRepairStatusToNotify.add(sstable);
sstableIterator.remove();
shouldAnticompact = true;
break;
}
else if (sstableRange.intersects(r))
{
logger.info("[repair #{}] SSTable {} ({}) will be anticompacted on range {}", parentRepairSession, sstable, sstableRange, r);
shouldAnticompact = true;
}
}
if (!shouldAnticompact)
{
logger.info("[repair #{}] SSTable {} ({}) does not intersect repaired ranges {}, not touching repairedAt.", parentRepairSession, sstable, sstableRange, normalizedRanges);
nonAnticompacting.add(sstable);
sstableIterator.remove();
}
}
cfs.getTracker().notifySSTableRepairedStatusChanged(mutatedRepairStatusToNotify);
txn.cancel(Sets.union(nonAnticompacting, mutatedRepairStatuses));
validatedForRepair.release(Sets.union(nonAnticompacting, mutatedRepairStatuses));
assert txn.originals().equals(sstables);
if (!sstables.isEmpty())
doAntiCompaction(cfs, ranges, txn, repairedAt);
txn.finish();
}
finally
{
validatedForRepair.release();
txn.close();
}
logger.info("[repair #{}] Completed anticompaction successfully", parentRepairSession);
}
public void performMaximal(final ColumnFamilyStore cfStore, boolean splitOutput)
{
FBUtilities.waitOnFutures(submitMaximal(cfStore, getDefaultGcBefore(cfStore, FBUtilities.nowInSeconds()), splitOutput));
}
public List> submitMaximal(final ColumnFamilyStore cfStore, final int gcBefore, boolean splitOutput)
{
// here we compute the task off the compaction executor, so having that present doesn't
// confuse runWithCompactionsDisabled -- i.e., we don't want to deadlock ourselves, waiting
// for ourselves to finish/acknowledge cancellation before continuing.
final Collection tasks = cfStore.getCompactionStrategyManager().getMaximalTasks(gcBefore, splitOutput);
if (tasks == null)
return Collections.emptyList();
List> futures = new ArrayList<>();
int nonEmptyTasks = 0;
for (final AbstractCompactionTask task : tasks)
{
if (task.transaction.originals().size() > 0)
nonEmptyTasks++;
Runnable runnable = new WrappedRunnable()
{
protected void runMayThrow()
{
task.execute(metrics);
}
};
Future fut = executor.submitIfRunning(runnable, "maximal task");
if (!fut.isCancelled())
futures.add(fut);
}
if (nonEmptyTasks > 1)
logger.info("Major compaction will not result in a single sstable - repaired and unrepaired data is kept separate and compaction runs per data_file_directory.");
return futures;
}
public void forceCompactionForTokenRange(ColumnFamilyStore cfStore, Collection> ranges)
{
final Collection tasks = cfStore.runWithCompactionsDisabled(() ->
{
Collection sstables = sstablesInBounds(cfStore, ranges);
if (sstables == null || sstables.isEmpty())
{
logger.debug("No sstables found for the provided token range");
return null;
}
return cfStore.getCompactionStrategyManager().getUserDefinedTasks(sstables, getDefaultGcBefore(cfStore, FBUtilities.nowInSeconds()));
}, false, false);
if (tasks == null)
return;
Runnable runnable = new WrappedRunnable()
{
protected void runMayThrow()
{
for (AbstractCompactionTask task : tasks)
if (task != null)
task.execute(metrics);
}
};
if (executor.isShutdown())
{
logger.info("Compaction executor has shut down, not submitting task");
return;
}
FBUtilities.waitOnFuture(executor.submit(runnable));
}
private static Collection sstablesInBounds(ColumnFamilyStore cfs, Collection> tokenRangeCollection)
{
final Set sstables = new HashSet<>();
Iterable liveTables = cfs.getTracker().getView().select(SSTableSet.LIVE);
SSTableIntervalTree tree = SSTableIntervalTree.build(liveTables);
for (Range tokenRange : tokenRangeCollection)
{
Iterable ssTableReaders = View.sstablesInBounds(tokenRange.left.minKeyBound(), tokenRange.right.maxKeyBound(), tree);
Iterables.addAll(sstables, ssTableReaders);
}
return sstables;
}
public void forceUserDefinedCompaction(String dataFiles)
{
String[] filenames = dataFiles.split(",");
Multimap descriptors = ArrayListMultimap.create();
for (String filename : filenames)
{
// extract keyspace and columnfamily name from filename
Descriptor desc = Descriptor.fromFilename(filename.trim());
if (Schema.instance.getCFMetaData(desc) == null)
{
logger.warn("Schema does not exist for file {}. Skipping.", filename);
continue;
}
// group by keyspace/columnfamily
ColumnFamilyStore cfs = Keyspace.open(desc.ksname).getColumnFamilyStore(desc.cfname);
descriptors.put(cfs, cfs.getDirectories().find(new File(filename.trim()).getName()));
}
List> futures = new ArrayList<>();
int nowInSec = FBUtilities.nowInSeconds();
for (ColumnFamilyStore cfs : descriptors.keySet())
futures.add(submitUserDefined(cfs, descriptors.get(cfs), getDefaultGcBefore(cfs, nowInSec)));
FBUtilities.waitOnFutures(futures);
}
public void forceUserDefinedCleanup(String dataFiles)
{
String[] filenames = dataFiles.split(",");
HashMap descriptors = Maps.newHashMap();
for (String filename : filenames)
{
// extract keyspace and columnfamily name from filename
Descriptor desc = Descriptor.fromFilename(filename.trim());
if (Schema.instance.getCFMetaData(desc) == null)
{
logger.warn("Schema does not exist for file {}. Skipping.", filename);
continue;
}
// group by keyspace/columnfamily
ColumnFamilyStore cfs = Keyspace.open(desc.ksname).getColumnFamilyStore(desc.cfname);
desc = cfs.getDirectories().find(new File(filename.trim()).getName());
if (desc != null)
descriptors.put(cfs, desc);
}
for (Map.Entry entry : descriptors.entrySet())
{
ColumnFamilyStore cfs = entry.getKey();
Keyspace keyspace = cfs.keyspace;
Collection> ranges = StorageService.instance.getLocalRanges(keyspace.getName());
boolean hasIndexes = cfs.indexManager.hasIndexes();
SSTableReader sstable = lookupSSTable(cfs, entry.getValue());
if (ranges.isEmpty())
{
logger.error("Cleanup cannot run before a node has joined the ring");
return;
}
if (sstable == null)
{
logger.warn("Will not clean {}, it is not an active sstable", entry.getValue());
}
else
{
CleanupStrategy cleanupStrategy = CleanupStrategy.get(cfs, ranges, FBUtilities.nowInSeconds());
try (LifecycleTransaction txn = cfs.getTracker().tryModify(sstable, OperationType.CLEANUP))
{
doCleanupOne(cfs, txn, cleanupStrategy, ranges, hasIndexes);
}
catch (IOException e)
{
logger.error("forceUserDefinedCleanup failed: {}", e.getLocalizedMessage());
}
}
}
}
public Future submitUserDefined(final ColumnFamilyStore cfs, final Collection dataFiles, final int gcBefore)
{
Runnable runnable = new WrappedRunnable()
{
protected void runMayThrow()
{
// look up the sstables now that we're on the compaction executor, so we don't try to re-compact
// something that was already being compacted earlier.
Collection sstables = new ArrayList<>(dataFiles.size());
for (Descriptor desc : dataFiles)
{
// inefficient but not in a performance sensitive path
SSTableReader sstable = lookupSSTable(cfs, desc);
if (sstable == null)
{
logger.info("Will not compact {}: it is not an active sstable", desc);
}
else
{
sstables.add(sstable);
}
}
if (sstables.isEmpty())
{
logger.info("No files to compact for user defined compaction");
}
else
{
List tasks = cfs.getCompactionStrategyManager().getUserDefinedTasks(sstables, gcBefore);
for (AbstractCompactionTask task : tasks)
{
if (task != null)
task.execute(metrics);
}
}
}
};
return executor.submitIfRunning(runnable, "user defined task");
}
// This acquire a reference on the sstable
// This is not efficient, do not use in any critical path
private SSTableReader lookupSSTable(final ColumnFamilyStore cfs, Descriptor descriptor)
{
for (SSTableReader sstable : cfs.getSSTables(SSTableSet.CANONICAL))
{
if (sstable.descriptor.equals(descriptor))
return sstable;
}
return null;
}
/**
* Does not mutate data, so is not scheduled.
*/
public Future submitValidation(final ColumnFamilyStore cfStore, final Validator validator)
{
Callable callable = new Callable()
{
public Object call() throws IOException
{
try
{
doValidationCompaction(cfStore, validator);
}
catch (Throwable e)
{
// we need to inform the remote end of our failure, otherwise it will hang on repair forever
validator.fail();
throw e;
}
return this;
}
};
return validationExecutor.submitIfRunning(callable, "validation");
}
/* Used in tests. */
public void disableAutoCompaction()
{
for (String ksname : Schema.instance.getNonSystemKeyspaces())
{
for (ColumnFamilyStore cfs : Keyspace.open(ksname).getColumnFamilyStores())
cfs.disableAutoCompaction();
}
}
private void scrubOne(ColumnFamilyStore cfs, LifecycleTransaction modifier, boolean skipCorrupted, boolean checkData) throws IOException
{
CompactionInfo.Holder scrubInfo = null;
try (Scrubber scrubber = new Scrubber(cfs, modifier, skipCorrupted, checkData))
{
scrubInfo = scrubber.getScrubInfo();
metrics.beginCompaction(scrubInfo);
scrubber.scrub();
}
finally
{
if (scrubInfo != null)
metrics.finishCompaction(scrubInfo);
}
}
private void verifyOne(ColumnFamilyStore cfs, SSTableReader sstable, boolean extendedVerify) throws IOException
{
CompactionInfo.Holder verifyInfo = null;
try (Verifier verifier = new Verifier(cfs, sstable, false))
{
verifyInfo = verifier.getVerifyInfo();
metrics.beginCompaction(verifyInfo);
verifier.verify(extendedVerify);
}
finally
{
if (verifyInfo != null)
metrics.finishCompaction(verifyInfo);
}
}
/**
* Determines if a cleanup would actually remove any data in this SSTable based
* on a set of owned ranges.
*/
@VisibleForTesting
public static boolean needsCleanup(SSTableReader sstable, Collection> ownedRanges)
{
assert !ownedRanges.isEmpty(); // cleanup checks for this
// unwrap and sort the ranges by LHS token
List> sortedRanges = Range.normalize(ownedRanges);
// see if there are any keys LTE the token for the start of the first range
// (token range ownership is exclusive on the LHS.)
Range firstRange = sortedRanges.get(0);
if (sstable.first.getToken().compareTo(firstRange.left) <= 0)
return true;
// then, iterate over all owned ranges and see if the next key beyond the end of the owned
// range falls before the start of the next range
for (int i = 0; i < sortedRanges.size(); i++)
{
Range range = sortedRanges.get(i);
if (range.right.isMinimum())
{
// we split a wrapping range and this is the second half.
// there can't be any keys beyond this (and this is the last range)
return false;
}
DecoratedKey firstBeyondRange = sstable.firstKeyBeyond(range.right.maxKeyBound());
if (firstBeyondRange == null)
{
// we ran off the end of the sstable looking for the next key; we don't need to check any more ranges
return false;
}
if (i == (sortedRanges.size() - 1))
{
// we're at the last range and we found a key beyond the end of the range
return true;
}
Range nextRange = sortedRanges.get(i + 1);
if (firstBeyondRange.getToken().compareTo(nextRange.left) <= 0)
{
// we found a key in between the owned ranges
return true;
}
}
return false;
}
/**
* This function goes over a file and removes the keys that the node is not responsible for
* and only keeps keys that this node is responsible for.
*
* @throws IOException
*/
private void doCleanupOne(final ColumnFamilyStore cfs, LifecycleTransaction txn, CleanupStrategy cleanupStrategy, Collection> ranges, boolean hasIndexes) throws IOException
{
assert !cfs.isIndex();
SSTableReader sstable = txn.onlyOne();
if (!hasIndexes && !new Bounds<>(sstable.first.getToken(), sstable.last.getToken()).intersects(ranges))
{
txn.obsoleteOriginals();
txn.finish();
return;
}
if (!needsCleanup(sstable, ranges))
{
logger.trace("Skipping {} for cleanup; all rows should be kept", sstable);
return;
}
long start = System.nanoTime();
long totalkeysWritten = 0;
long expectedBloomFilterSize = Math.max(cfs.metadata.params.minIndexInterval,
SSTableReader.getApproximateKeyCount(txn.originals()));
if (logger.isTraceEnabled())
logger.trace("Expected bloom filter size : {}", expectedBloomFilterSize);
logger.info("Cleaning up {}", sstable);
File compactionFileLocation = sstable.descriptor.directory;
RateLimiter limiter = getRateLimiter();
double compressionRatio = sstable.getCompressionRatio();
if (compressionRatio == MetadataCollector.NO_COMPRESSION_RATIO)
compressionRatio = 1.0;
List finished;
int nowInSec = FBUtilities.nowInSeconds();
try (SSTableRewriter writer = SSTableRewriter.construct(cfs, txn, false, sstable.maxDataAge);
ISSTableScanner scanner = cleanupStrategy.getScanner(sstable, null);
CompactionController controller = new CompactionController(cfs, txn.originals(), getDefaultGcBefore(cfs, nowInSec));
CompactionIterator ci = new CompactionIterator(OperationType.CLEANUP, Collections.singletonList(scanner), controller, nowInSec, UUIDGen.getTimeUUID(), metrics))
{
writer.switchWriter(createWriter(cfs, compactionFileLocation, expectedBloomFilterSize, sstable.getSSTableMetadata().repairedAt, sstable, txn));
long lastBytesScanned = 0;
while (ci.hasNext())
{
if (ci.isStopRequested())
throw new CompactionInterruptedException(ci.getCompactionInfo());
try (UnfilteredRowIterator partition = ci.next();
UnfilteredRowIterator notCleaned = cleanupStrategy.cleanup(partition))
{
if (notCleaned == null)
continue;
if (writer.append(notCleaned) != null)
totalkeysWritten++;
long bytesScanned = scanner.getBytesScanned();
compactionRateLimiterAcquire(limiter, bytesScanned, lastBytesScanned, compressionRatio);
lastBytesScanned = bytesScanned;
}
}
// flush to ensure we don't lose the tombstones on a restart, since they are not commitlog'd
cfs.indexManager.flushAllIndexesBlocking();
finished = writer.finish();
}
if (!finished.isEmpty())
{
String format = "Cleaned up to %s. %s to %s (~%d%% of original) for %,d keys. Time: %,dms.";
long dTime = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - start);
long startsize = sstable.onDiskLength();
long endsize = 0;
for (SSTableReader newSstable : finished)
endsize += newSstable.onDiskLength();
double ratio = (double) endsize / (double) startsize;
logger.info(String.format(format, finished.get(0).getFilename(), FBUtilities.prettyPrintMemory(startsize),
FBUtilities.prettyPrintMemory(endsize), (int) (ratio * 100), totalkeysWritten, dTime));
}
}
static void compactionRateLimiterAcquire(RateLimiter limiter, long bytesScanned, long lastBytesScanned, double compressionRatio)
{
long lengthRead = (long) ((bytesScanned - lastBytesScanned) * compressionRatio) + 1;
while (lengthRead >= Integer.MAX_VALUE)
{
limiter.acquire(Integer.MAX_VALUE);
lengthRead -= Integer.MAX_VALUE;
}
if (lengthRead > 0)
{
limiter.acquire((int) lengthRead);
}
}
private static abstract class CleanupStrategy
{
protected final Collection> ranges;
protected final int nowInSec;
protected CleanupStrategy(Collection> ranges, int nowInSec)
{
this.ranges = ranges;
this.nowInSec = nowInSec;
}
public static CleanupStrategy get(ColumnFamilyStore cfs, Collection> ranges, int nowInSec)
{
return cfs.indexManager.hasIndexes()
? new Full(cfs, ranges, nowInSec)
: new Bounded(cfs, ranges, nowInSec);
}
public abstract ISSTableScanner getScanner(SSTableReader sstable, RateLimiter limiter);
public abstract UnfilteredRowIterator cleanup(UnfilteredRowIterator partition);
private static final class Bounded extends CleanupStrategy
{
public Bounded(final ColumnFamilyStore cfs, Collection> ranges, int nowInSec)
{
super(ranges, nowInSec);
cacheCleanupExecutor.submit(new Runnable()
{
@Override
public void run()
{
cfs.cleanupCache();
}
});
}
@Override
public ISSTableScanner getScanner(SSTableReader sstable, RateLimiter limiter)
{
return sstable.getScanner(ranges, limiter);
}
@Override
public UnfilteredRowIterator cleanup(UnfilteredRowIterator partition)
{
return partition;
}
}
private static final class Full extends CleanupStrategy
{
private final ColumnFamilyStore cfs;
public Full(ColumnFamilyStore cfs, Collection> ranges, int nowInSec)
{
super(ranges, nowInSec);
this.cfs = cfs;
}
@Override
public ISSTableScanner getScanner(SSTableReader sstable, RateLimiter limiter)
{
return sstable.getScanner(limiter);
}
@Override
public UnfilteredRowIterator cleanup(UnfilteredRowIterator partition)
{
if (Range.isInRanges(partition.partitionKey().getToken(), ranges))
return partition;
cfs.invalidateCachedPartition(partition.partitionKey());
cfs.indexManager.deletePartition(partition, nowInSec);
return null;
}
}
}
public static SSTableWriter createWriter(ColumnFamilyStore cfs,
File compactionFileLocation,
long expectedBloomFilterSize,
long repairedAt,
SSTableReader sstable,
LifecycleTransaction txn)
{
FileUtils.createDirectory(compactionFileLocation);
SerializationHeader header = sstable.header;
if (header == null)
header = SerializationHeader.make(sstable.metadata, Collections.singleton(sstable));
return SSTableWriter.create(cfs.metadata,
Descriptor.fromFilename(cfs.getSSTablePath(compactionFileLocation)),
expectedBloomFilterSize,
repairedAt,
sstable.getSSTableLevel(),
header,
cfs.indexManager.listIndexes(),
txn);
}
public static SSTableWriter createWriterForAntiCompaction(ColumnFamilyStore cfs,
File compactionFileLocation,
int expectedBloomFilterSize,
long repairedAt,
Collection sstables,
LifecycleTransaction txn)
{
FileUtils.createDirectory(compactionFileLocation);
int minLevel = Integer.MAX_VALUE;
// if all sstables have the same level, we can compact them together without creating overlap during anticompaction
// note that we only anticompact from unrepaired sstables, which is not leveled, but we still keep original level
// after first migration to be able to drop the sstables back in their original place in the repaired sstable manifest
for (SSTableReader sstable : sstables)
{
if (minLevel == Integer.MAX_VALUE)
minLevel = sstable.getSSTableLevel();
if (minLevel != sstable.getSSTableLevel())
{
minLevel = 0;
break;
}
}
return SSTableWriter.create(Descriptor.fromFilename(cfs.getSSTablePath(compactionFileLocation)),
(long) expectedBloomFilterSize,
repairedAt,
cfs.metadata,
new MetadataCollector(sstables, cfs.metadata.comparator, minLevel),
SerializationHeader.make(cfs.metadata, sstables),
cfs.indexManager.listIndexes(),
txn);
}
/**
* Performs a readonly "compaction" of all sstables in order to validate complete rows,
* but without writing the merge result
*/
@SuppressWarnings("resource")
private void doValidationCompaction(ColumnFamilyStore cfs, Validator validator) throws IOException
{
// this isn't meant to be race-proof, because it's not -- it won't cause bugs for a CFS to be dropped
// mid-validation, or to attempt to validate a droped CFS. this is just a best effort to avoid useless work,
// particularly in the scenario where a validation is submitted before the drop, and there are compactions
// started prior to the drop keeping some sstables alive. Since validationCompaction can run
// concurrently with other compactions, it would otherwise go ahead and scan those again.
if (!cfs.isValid())
return;
Refs sstables = null;
try
{
int gcBefore;
int nowInSec = FBUtilities.nowInSeconds();
UUID parentRepairSessionId = validator.desc.parentSessionId;
String snapshotName;
boolean isGlobalSnapshotValidation = cfs.snapshotExists(parentRepairSessionId.toString());
if (isGlobalSnapshotValidation)
snapshotName = parentRepairSessionId.toString();
else
snapshotName = validator.desc.sessionId.toString();
boolean isSnapshotValidation = cfs.snapshotExists(snapshotName);
if (isSnapshotValidation)
{
// If there is a snapshot created for the session then read from there.
// note that we populate the parent repair session when creating the snapshot, meaning the sstables in the snapshot are the ones we
// are supposed to validate.
sstables = cfs.getSnapshotSSTableReader(snapshotName);
// Computing gcbefore based on the current time wouldn't be very good because we know each replica will execute
// this at a different time (that's the whole purpose of repair with snaphsot). So instead we take the creation
// time of the snapshot, which should give us roughtly the same time on each replica (roughtly being in that case
// 'as good as in the non-snapshot' case)
gcBefore = cfs.gcBefore((int)(cfs.getSnapshotCreationTime(snapshotName) / 1000));
}
else
{
// flush first so everyone is validating data that is as similar as possible
StorageService.instance.forceKeyspaceFlush(cfs.keyspace.getName(), cfs.name);
sstables = getSSTablesToValidate(cfs, validator);
if (sstables == null)
return; // this means the parent repair session was removed - the repair session failed on another node and we removed it
if (validator.gcBefore > 0)
gcBefore = validator.gcBefore;
else
gcBefore = getDefaultGcBefore(cfs, nowInSec);
}
// Create Merkle trees suitable to hold estimated partitions for the given ranges.
// We blindly assume that a partition is evenly distributed on all sstables for now.
MerkleTrees tree = createMerkleTrees(sstables, validator.desc.ranges, cfs);
long start = System.nanoTime();
try (AbstractCompactionStrategy.ScannerList scanners = cfs.getCompactionStrategyManager().getScanners(sstables, validator.desc.ranges);
ValidationCompactionController controller = new ValidationCompactionController(cfs, gcBefore);
CompactionIterator ci = new ValidationCompactionIterator(scanners.scanners, controller, nowInSec, metrics))
{
// validate the CF as we iterate over it
validator.prepare(cfs, tree);
while (ci.hasNext())
{
if (ci.isStopRequested())
throw new CompactionInterruptedException(ci.getCompactionInfo());
try (UnfilteredRowIterator partition = ci.next())
{
validator.add(partition);
}
}
validator.complete();
}
finally
{
if (isSnapshotValidation && !isGlobalSnapshotValidation)
{
// we can only clear the snapshot if we are not doing a global snapshot validation (we then clear it once anticompaction
// is done).
cfs.clearSnapshot(snapshotName);
}
}
if (logger.isDebugEnabled())
{
long duration = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - start);
logger.debug("Validation finished in {} msec, for {}",
duration,
validator.desc);
}
}
finally
{
if (sstables != null)
sstables.release();
}
}
private static MerkleTrees createMerkleTrees(Iterable sstables, Collection> ranges, ColumnFamilyStore cfs)
{
MerkleTrees tree = new MerkleTrees(cfs.getPartitioner());
long allPartitions = 0;
Map, Long> rangePartitionCounts = Maps.newHashMapWithExpectedSize(ranges.size());
for (Range range : ranges)
{
long numPartitions = 0;
for (SSTableReader sstable : sstables)
numPartitions += sstable.estimatedKeysForRanges(Collections.singleton(range));
rangePartitionCounts.put(range, numPartitions);
allPartitions += numPartitions;
}
for (Range range : ranges)
{
long numPartitions = rangePartitionCounts.get(range);
double rangeOwningRatio = allPartitions > 0 ? (double)numPartitions / allPartitions : 0;
// determine max tree depth proportional to range size to avoid blowing up memory with multiple tress,
// capping at 20 to prevent large tree (CASSANDRA-11390)
int maxDepth = rangeOwningRatio > 0 ? (int) Math.floor(20 - Math.log(1 / rangeOwningRatio) / Math.log(2)) : 0;
// determine tree depth from number of partitions, capping at max tree depth (CASSANDRA-5263)
int depth = numPartitions > 0 ? (int) Math.min(Math.ceil(Math.log(numPartitions) / Math.log(2)), maxDepth) : 0;
tree.addMerkleTree((int) Math.pow(2, depth), range);
}
if (logger.isDebugEnabled())
{
// MT serialize may take time
logger.debug("Created {} merkle trees with merkle trees size {}, {} partitions, {} bytes", tree.ranges().size(), tree.size(), allPartitions, MerkleTrees.serializer.serializedSize(tree, 0));
}
return tree;
}
private synchronized Refs getSSTablesToValidate(ColumnFamilyStore cfs, Validator validator)
{
Refs sstables;
ActiveRepairService.ParentRepairSession prs = ActiveRepairService.instance.getParentRepairSession(validator.desc.parentSessionId);
if (prs == null)
return null;
Set sstablesToValidate = new HashSet<>();
if (prs.isGlobal)
prs.markSSTablesRepairing(cfs.metadata.cfId, validator.desc.parentSessionId);
// note that we always grab all existing sstables for this - if we were to just grab the ones that
// were marked as repairing, we would miss any ranges that were compacted away and this would cause us to overstream
try (ColumnFamilyStore.RefViewFragment sstableCandidates = cfs.selectAndReference(View.select(SSTableSet.CANONICAL, (s) -> !prs.isIncremental || !s.isRepaired())))
{
for (SSTableReader sstable : sstableCandidates.sstables)
{
if (new Bounds<>(sstable.first.getToken(), sstable.last.getToken()).intersects(validator.desc.ranges))
{
sstablesToValidate.add(sstable);
}
}
sstables = Refs.tryRef(sstablesToValidate);
if (sstables == null)
{
logger.error("Could not reference sstables");
throw new RuntimeException("Could not reference sstables");
}
}
return sstables;
}
/**
* Splits up an sstable into two new sstables. The first of the new tables will store repaired ranges, the second
* will store the non-repaired ranges. Once anticompation is completed, the original sstable is marked as compacted
* and subsequently deleted.
* @param cfs
* @param repaired a transaction over the repaired sstables to anticompacy
* @param ranges Repaired ranges to be placed into one of the new sstables. The repaired table will be tracked via
* the {@link org.apache.cassandra.io.sstable.metadata.StatsMetadata#repairedAt} field.
*/
private void doAntiCompaction(ColumnFamilyStore cfs, Collection> ranges, LifecycleTransaction repaired, long repairedAt)
{
logger.info("Performing anticompaction on {} sstables", repaired.originals().size());
//Group SSTables
Set sstables = repaired.originals();
// Repairs can take place on both unrepaired (incremental + full) and repaired (full) data.
// Although anti-compaction could work on repaired sstables as well and would result in having more accurate
// repairedAt values for these, we still avoid anti-compacting already repaired sstables, as we currently don't
// make use of any actual repairedAt value and splitting up sstables just for that is not worth it at this point.
Set unrepairedSSTables = sstables.stream().filter((s) -> !s.isRepaired()).collect(Collectors.toSet());
Collection> groupedSSTables = cfs.getCompactionStrategyManager().groupSSTablesForAntiCompaction(unrepairedSSTables);
// iterate over sstables to check if the repaired / unrepaired ranges intersect them.
int antiCompactedSSTableCount = 0;
for (Collection sstableGroup : groupedSSTables)
{
try (LifecycleTransaction txn = repaired.split(sstableGroup))
{
int antiCompacted = antiCompactGroup(cfs, ranges, txn, repairedAt);
antiCompactedSSTableCount += antiCompacted;
}
}
String format = "Anticompaction completed successfully, anticompacted from {} to {} sstable(s).";
logger.info(format, repaired.originals().size(), antiCompactedSSTableCount);
}
private int antiCompactGroup(ColumnFamilyStore cfs, Collection> ranges,
LifecycleTransaction anticompactionGroup, long repairedAt)
{
long groupMaxDataAge = -1;
for (Iterator i = anticompactionGroup.originals().iterator(); i.hasNext();)
{
SSTableReader sstable = i.next();
if (groupMaxDataAge < sstable.maxDataAge)
groupMaxDataAge = sstable.maxDataAge;
}
if (anticompactionGroup.originals().size() == 0)
{
logger.info("No valid anticompactions for this group, All sstables were compacted and are no longer available");
return 0;
}
logger.info("Anticompacting {}", anticompactionGroup);
Set sstableAsSet = anticompactionGroup.originals();
File destination = cfs.getDirectories().getWriteableLocationAsFile(cfs.getExpectedCompactedFileSize(sstableAsSet, OperationType.ANTICOMPACTION));
long repairedKeyCount = 0;
long unrepairedKeyCount = 0;
int nowInSec = FBUtilities.nowInSeconds();
CompactionStrategyManager strategy = cfs.getCompactionStrategyManager();
try (SSTableRewriter repairedSSTableWriter = SSTableRewriter.constructWithoutEarlyOpening(anticompactionGroup, false, groupMaxDataAge);
SSTableRewriter unRepairedSSTableWriter = SSTableRewriter.constructWithoutEarlyOpening(anticompactionGroup, false, groupMaxDataAge);
AbstractCompactionStrategy.ScannerList scanners = strategy.getScanners(anticompactionGroup.originals());
CompactionController controller = new CompactionController(cfs, sstableAsSet, getDefaultGcBefore(cfs, nowInSec));
CompactionIterator ci = new CompactionIterator(OperationType.ANTICOMPACTION, scanners.scanners, controller, nowInSec, UUIDGen.getTimeUUID(), metrics))
{
int expectedBloomFilterSize = Math.max(cfs.metadata.params.minIndexInterval, (int)(SSTableReader.getApproximateKeyCount(sstableAsSet)));
repairedSSTableWriter.switchWriter(CompactionManager.createWriterForAntiCompaction(cfs, destination, expectedBloomFilterSize, repairedAt, sstableAsSet, anticompactionGroup));
unRepairedSSTableWriter.switchWriter(CompactionManager.createWriterForAntiCompaction(cfs, destination, expectedBloomFilterSize, ActiveRepairService.UNREPAIRED_SSTABLE, sstableAsSet, anticompactionGroup));
Range.OrderedRangeContainmentChecker containmentChecker = new Range.OrderedRangeContainmentChecker(ranges);
while (ci.hasNext())
{
try (UnfilteredRowIterator partition = ci.next())
{
// if current range from sstable is repaired, save it into the new repaired sstable
if (containmentChecker.contains(partition.partitionKey().getToken()))
{
repairedSSTableWriter.append(partition);
repairedKeyCount++;
}
// otherwise save into the new 'non-repaired' table
else
{
unRepairedSSTableWriter.append(partition);
unrepairedKeyCount++;
}
}
}
List anticompactedSSTables = new ArrayList<>();
// since both writers are operating over the same Transaction, we cannot use the convenience Transactional.finish() method,
// as on the second finish() we would prepareToCommit() on a Transaction that has already been committed, which is forbidden by the API
// (since it indicates misuse). We call permitRedundantTransitions so that calls that transition to a state already occupied are permitted.
anticompactionGroup.permitRedundantTransitions();
repairedSSTableWriter.setRepairedAt(repairedAt).prepareToCommit();
unRepairedSSTableWriter.prepareToCommit();
anticompactedSSTables.addAll(repairedSSTableWriter.finished());
anticompactedSSTables.addAll(unRepairedSSTableWriter.finished());
repairedSSTableWriter.commit();
unRepairedSSTableWriter.commit();
logger.trace("Repaired {} keys out of {} for {}/{} in {}", repairedKeyCount,
repairedKeyCount + unrepairedKeyCount,
cfs.keyspace.getName(),
cfs.getColumnFamilyName(),
anticompactionGroup);
return anticompactedSSTables.size();
}
catch (Throwable e)
{
JVMStabilityInspector.inspectThrowable(e);
logger.error("Error anticompacting " + anticompactionGroup, e);
}
return 0;
}
/**
* Is not scheduled, because it is performing disjoint work from sstable compaction.
*/
public Future submitIndexBuild(final SecondaryIndexBuilder builder)
{
Runnable runnable = new Runnable()
{
public void run()
{
metrics.beginCompaction(builder);
try
{
builder.build();
}
finally
{
metrics.finishCompaction(builder);
}
}
};
return executor.submitIfRunning(runnable, "index build");
}
public Future submitCacheWrite(final AutoSavingCache.Writer writer)
{
Runnable runnable = new Runnable()
{
public void run()
{
if (!AutoSavingCache.flushInProgress.add(writer.cacheType()))
{
logger.trace("Cache flushing was already in progress: skipping {}", writer.getCompactionInfo());
return;
}
try
{
metrics.beginCompaction(writer);
try
{
writer.saveCache();
}
finally
{
metrics.finishCompaction(writer);
}
}
finally
{
AutoSavingCache.flushInProgress.remove(writer.cacheType());
}
}
};
return executor.submitIfRunning(runnable, "cache write");
}
public List runIndexSummaryRedistribution(IndexSummaryRedistribution redistribution) throws IOException
{
metrics.beginCompaction(redistribution);
try
{
return redistribution.redistributeSummaries();
}
finally
{
metrics.finishCompaction(redistribution);
}
}
public static int getDefaultGcBefore(ColumnFamilyStore cfs, int nowInSec)
{
// 2ndary indexes have ExpiringColumns too, so we need to purge tombstones deleted before now. We do not need to
// add any GcGrace however since 2ndary indexes are local to a node.
return cfs.isIndex() ? nowInSec : cfs.gcBefore(nowInSec);
}
private static class ValidationCompactionIterator extends CompactionIterator
{
public ValidationCompactionIterator(List scanners, ValidationCompactionController controller, int nowInSec, CompactionMetrics metrics)
{
super(OperationType.VALIDATION, scanners, controller, nowInSec, UUIDGen.getTimeUUID(), metrics);
}
}
/*
* Controller for validation compaction that always purges.
* Note that we should not call cfs.getOverlappingSSTables on the provided
* sstables because those sstables are not guaranteed to be active sstables
* (since we can run repair on a snapshot).
*/
private static class ValidationCompactionController extends CompactionController
{
public ValidationCompactionController(ColumnFamilyStore cfs, int gcBefore)
{
super(cfs, gcBefore);
}
@Override
public Predicate getPurgeEvaluator(DecoratedKey key)
{
/*
* The main reason we always purge is that including gcable tombstone would mean that the
* repair digest will depends on the scheduling of compaction on the different nodes. This
* is still not perfect because gcbefore is currently dependend on the current time at which
* the validation compaction start, which while not too bad for normal repair is broken for
* repair on snapshots. A better solution would be to agree on a gcbefore that all node would
* use, and we'll do that with CASSANDRA-4932.
* Note validation compaction includes all sstables, so we don't have the problem of purging
* a tombstone that could shadow a column in another sstable, but this is doubly not a concern
* since validation compaction is read-only.
*/
return time -> true;
}
}
public Future submitViewBuilder(final ViewBuilder builder)
{
Runnable runnable = new Runnable()
{
public void run()
{
metrics.beginCompaction(builder);
try
{
builder.run();
}
finally
{
metrics.finishCompaction(builder);
}
}
};
if (executor.isShutdown())
{
logger.info("Compaction executor has shut down, not submitting index build");
return null;
}
return executor.submit(runnable);
}
public int getActiveCompactions()
{
return CompactionMetrics.getCompactions().size();
}
static class CompactionExecutor extends JMXEnabledThreadPoolExecutor
{
protected CompactionExecutor(int minThreads, int maxThreads, String name, BlockingQueue queue)
{
super(minThreads, maxThreads, 60, TimeUnit.SECONDS, queue, new NamedThreadFactory(name, Thread.MIN_PRIORITY), "internal");
}
private CompactionExecutor(int threadCount, String name)
{
this(threadCount, threadCount, name, new LinkedBlockingQueue());
}
public CompactionExecutor()
{
this(Math.max(1, DatabaseDescriptor.getConcurrentCompactors()), "CompactionExecutor");
}
protected void beforeExecute(Thread t, Runnable r)
{
// can't set this in Thread factory, so we do it redundantly here
isCompactionManager.set(true);
super.beforeExecute(t, r);
}
// modified from DebuggableThreadPoolExecutor so that CompactionInterruptedExceptions are not logged
@Override
public void afterExecute(Runnable r, Throwable t)
{
DebuggableThreadPoolExecutor.maybeResetTraceSessionWrapper(r);
if (t == null)
t = DebuggableThreadPoolExecutor.extractThrowable(r);
if (t != null)
{
if (t instanceof CompactionInterruptedException)
{
logger.info(t.getMessage());
if (t.getSuppressed() != null && t.getSuppressed().length > 0)
logger.warn("Interruption of compaction encountered exceptions:", t);
else
logger.trace("Full interruption stack trace:", t);
}
else
{
DebuggableThreadPoolExecutor.handleOrLog(t);
}
}
// Snapshots cannot be deleted on Windows while segments of the root element are mapped in NTFS. Compactions
// unmap those segments which could free up a snapshot for successful deletion.
SnapshotDeletingTask.rescheduleFailedTasks();
}
public ListenableFuture submitIfRunning(Runnable task, String name)
{
return submitIfRunning(Executors.callable(task, null), name);
}
/**
* Submit the task but only if the executor has not been shutdown.If the executor has
* been shutdown, or in case of a rejected execution exception return a cancelled future.
*
* @param task - the task to submit
* @param name - the task name to use in log messages
*
* @return the future that will deliver the task result, or a future that has already been
* cancelled if the task could not be submitted.
*/
public ListenableFuture submitIfRunning(Callable task, String name)
{
if (isShutdown())
{
logger.info("Executor has been shut down, not submitting {}", name);
return Futures.immediateCancelledFuture();
}
try
{
ListenableFutureTask ret = ListenableFutureTask.create(task);
execute(ret);
return ret;
}
catch (RejectedExecutionException ex)
{
if (isShutdown())
logger.info("Executor has shut down, could not submit {}", name);
else
logger.error("Failed to submit {}", name, ex);
return Futures.immediateCancelledFuture();
}
}
}
private static class ValidationExecutor extends CompactionExecutor
{
public ValidationExecutor()
{
super(1, Integer.MAX_VALUE, "ValidationExecutor", new SynchronousQueue());
}
}
private static class CacheCleanupExecutor extends CompactionExecutor
{
public CacheCleanupExecutor()
{
super(1, "CacheCleanupExecutor");
}
}
public interface CompactionExecutorStatsCollector
{
void beginCompaction(CompactionInfo.Holder ci);
void finishCompaction(CompactionInfo.Holder ci);
}
public List> getCompactions()
{
List compactionHolders = CompactionMetrics.getCompactions();
List> out = new ArrayList>(compactionHolders.size());
for (CompactionInfo.Holder ci : compactionHolders)
out.add(ci.getCompactionInfo().asMap());
return out;
}
public List getCompactionSummary()
{
List compactionHolders = CompactionMetrics.getCompactions();
List out = new ArrayList(compactionHolders.size());
for (CompactionInfo.Holder ci : compactionHolders)
out.add(ci.getCompactionInfo().toString());
return out;
}
public TabularData getCompactionHistory()
{
try
{
return SystemKeyspace.getCompactionHistory();
}
catch (OpenDataException e)
{
throw new RuntimeException(e);
}
}
public long getTotalBytesCompacted()
{
return metrics.bytesCompacted.getCount();
}
public long getTotalCompactionsCompleted()
{
return metrics.totalCompactionsCompleted.getCount();
}
public int getPendingTasks()
{
return metrics.pendingTasks.getValue();
}
public long getCompletedTasks()
{
return metrics.completedTasks.getValue();
}
public void stopCompaction(String type)
{
OperationType operation = OperationType.valueOf(type);
for (Holder holder : CompactionMetrics.getCompactions())
{
if (holder.getCompactionInfo().getTaskType() == operation)
holder.stop();
}
}
public void stopCompactionById(String compactionId)
{
for (Holder holder : CompactionMetrics.getCompactions())
{
UUID holderId = holder.getCompactionInfo().compactionId();
if (holderId != null && holderId.equals(UUID.fromString(compactionId)))
holder.stop();
}
}
public void setConcurrentCompactors(int value)
{
if (value > executor.getCorePoolSize())
{
// we are increasing the value
executor.setMaximumPoolSize(value);
executor.setCorePoolSize(value);
}
else if (value < executor.getCorePoolSize())
{
// we are reducing the value
executor.setCorePoolSize(value);
executor.setMaximumPoolSize(value);
}
}
public int getCoreCompactorThreads()
{
return executor.getCorePoolSize();
}
public void setCoreCompactorThreads(int number)
{
executor.setCorePoolSize(number);
}
public int getMaximumCompactorThreads()
{
return executor.getMaximumPoolSize();
}
public void setMaximumCompactorThreads(int number)
{
executor.setMaximumPoolSize(number);
}
public int getCoreValidationThreads()
{
return validationExecutor.getCorePoolSize();
}
public void setCoreValidationThreads(int number)
{
validationExecutor.setCorePoolSize(number);
}
public int getMaximumValidatorThreads()
{
return validationExecutor.getMaximumPoolSize();
}
public void setMaximumValidatorThreads(int number)
{
validationExecutor.setMaximumPoolSize(number);
}
/**
* Try to stop all of the compactions for given ColumnFamilies.
*
* Note that this method does not wait for all compactions to finish; you'll need to loop against
* isCompacting if you want that behavior.
*
* @param columnFamilies The ColumnFamilies to try to stop compaction upon.
* @param interruptValidation true if validation operations for repair should also be interrupted
*
*/
public void interruptCompactionFor(Iterable columnFamilies, boolean interruptValidation)
{
assert columnFamilies != null;
// interrupt in-progress compactions
for (Holder compactionHolder : CompactionMetrics.getCompactions())
{
CompactionInfo info = compactionHolder.getCompactionInfo();
if ((info.getTaskType() == OperationType.VALIDATION) && !interruptValidation)
continue;
if (Iterables.contains(columnFamilies, info.getCFMetaData()))
compactionHolder.stop(); // signal compaction to stop
}
}
public void interruptCompactionForCFs(Iterable cfss, boolean interruptValidation)
{
List metadata = new ArrayList<>();
for (ColumnFamilyStore cfs : cfss)
metadata.add(cfs.metadata);
interruptCompactionFor(metadata, interruptValidation);
}
public void waitForCessation(Iterable cfss)
{
long start = System.nanoTime();
long delay = TimeUnit.MINUTES.toNanos(1);
while (System.nanoTime() - start < delay)
{
if (CompactionManager.instance.isCompacting(cfss))
Uninterruptibles.sleepUninterruptibly(1, TimeUnit.MILLISECONDS);
else
break;
}
}
}
