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/*
* 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.writers;
import java.util.Set;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.Directories;
import org.apache.cassandra.db.RowIndexEntry;
import org.apache.cassandra.db.SerializationHeader;
import org.apache.cassandra.db.compaction.OperationType;
import org.apache.cassandra.db.rows.UnfilteredRowIterator;
import org.apache.cassandra.db.lifecycle.LifecycleTransaction;
import org.apache.cassandra.io.sstable.Descriptor;
import org.apache.cassandra.io.sstable.format.SSTableReader;
import org.apache.cassandra.io.sstable.format.SSTableWriter;
import org.apache.cassandra.io.sstable.metadata.MetadataCollector;
public class MaxSSTableSizeWriter extends CompactionAwareWriter
{
private final long maxSSTableSize;
private final int level;
private final long estimatedSSTables;
private final Set allSSTables;
private Directories.DataDirectory sstableDirectory;
public MaxSSTableSizeWriter(ColumnFamilyStore cfs,
Directories directories,
LifecycleTransaction txn,
Set nonExpiredSSTables,
long maxSSTableSize,
int level)
{
this(cfs, directories, txn, nonExpiredSSTables, maxSSTableSize, level, false);
}
@Deprecated
public MaxSSTableSizeWriter(ColumnFamilyStore cfs,
Directories directories,
LifecycleTransaction txn,
Set nonExpiredSSTables,
long maxSSTableSize,
int level,
boolean offline,
boolean keepOriginals)
{
this(cfs, directories, txn, nonExpiredSSTables, maxSSTableSize, level, keepOriginals);
}
public MaxSSTableSizeWriter(ColumnFamilyStore cfs,
Directories directories,
LifecycleTransaction txn,
Set nonExpiredSSTables,
long maxSSTableSize,
int level,
boolean keepOriginals)
{
super(cfs, directories, txn, nonExpiredSSTables, keepOriginals);
this.allSSTables = txn.originals();
this.level = level;
this.maxSSTableSize = maxSSTableSize;
long totalSize = getTotalWriteSize(nonExpiredSSTables, estimatedTotalKeys, cfs, txn.opType());
estimatedSSTables = Math.max(1, totalSize / maxSSTableSize);
}
/**
* Gets the estimated total amount of data to write during compaction
*/
private static long getTotalWriteSize(Iterable nonExpiredSSTables, long estimatedTotalKeys, ColumnFamilyStore cfs, OperationType compactionType)
{
long estimatedKeysBeforeCompaction = 0;
for (SSTableReader sstable : nonExpiredSSTables)
estimatedKeysBeforeCompaction += sstable.estimatedKeys();
estimatedKeysBeforeCompaction = Math.max(1, estimatedKeysBeforeCompaction);
double estimatedCompactionRatio = (double) estimatedTotalKeys / estimatedKeysBeforeCompaction;
return Math.round(estimatedCompactionRatio * cfs.getExpectedCompactedFileSize(nonExpiredSSTables, compactionType));
}
protected boolean realAppend(UnfilteredRowIterator partition)
{
RowIndexEntry rie = sstableWriter.append(partition);
if (sstableWriter.currentWriter().getEstimatedOnDiskBytesWritten() > maxSSTableSize)
{
switchCompactionLocation(sstableDirectory);
}
return rie != null;
}
@Override
public void switchCompactionLocation(Directories.DataDirectory location)
{
sstableDirectory = location;
@SuppressWarnings("resource")
SSTableWriter writer = SSTableWriter.create(Descriptor.fromFilename(cfs.getSSTablePath(getDirectories().getLocationForDisk(sstableDirectory))),
estimatedTotalKeys / estimatedSSTables,
minRepairedAt,
cfs.metadata,
new MetadataCollector(allSSTables, cfs.metadata.comparator, level),
SerializationHeader.make(cfs.metadata, nonExpiredSSTables),
cfs.indexManager.listIndexes(),
txn);
sstableWriter.switchWriter(writer);
}
}