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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.hadoop.mapred.gridmix;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.net.URI;
import java.security.PrivilegedExceptionAction;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FsShell;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.mapred.gridmix.GenerateData.DataStatistics;
import org.apache.hadoop.mapred.gridmix.Statistics.JobStats;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.ExitUtil;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.hadoop.tools.rumen.JobStoryProducer;
import org.apache.hadoop.tools.rumen.ZombieJobProducer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Driver class for the Gridmix3 benchmark. Gridmix accepts a timestamped
* stream (trace) of job/task descriptions. For each job in the trace, the
* client will submit a corresponding, synthetic job to the target cluster at
* the rate in the original trace. The intent is to provide a benchmark that
* can be configured and extended to closely match the measured resource
* profile of actual, production loads.
*/
public class Gridmix extends Configured implements Tool {
public static final Log LOG = LogFactory.getLog(Gridmix.class);
/**
* Output (scratch) directory for submitted jobs. Relative paths are
* resolved against the path provided as input and absolute paths remain
* independent of it. The default is "gridmix".
*/
public static final String GRIDMIX_OUT_DIR = "gridmix.output.directory";
/**
* Number of submitting threads at the client and upper bound for
* in-memory split data. Submitting threads precompute InputSplits for
* submitted jobs. This limits the number of splits held in memory waiting
* for submission and also permits parallel computation of split data.
*/
public static final String GRIDMIX_SUB_THR = "gridmix.client.submit.threads";
/**
* The depth of the queue of job descriptions. Before splits are computed,
* a queue of pending descriptions is stored in memoory. This parameter
* limits the depth of that queue.
*/
public static final String GRIDMIX_QUE_DEP =
"gridmix.client.pending.queue.depth";
/**
* Multiplier to accelerate or decelerate job submission. As a crude means of
* sizing a job trace to a cluster, the time separating two jobs is
* multiplied by this factor.
*/
public static final String GRIDMIX_SUB_MUL = "gridmix.submit.multiplier";
/**
* Class used to resolve users in the trace to the list of target users
* on the cluster.
*/
public static final String GRIDMIX_USR_RSV = "gridmix.user.resolve.class";
/**
* The configuration key which determines the duration for which the
* job-monitor sleeps while polling for job status.
* This value should be specified in milliseconds.
*/
public static final String GRIDMIX_JOBMONITOR_SLEEPTIME_MILLIS =
"gridmix.job-monitor.sleep-time-ms";
/**
* Default value for {@link #GRIDMIX_JOBMONITOR_SLEEPTIME_MILLIS}.
*/
public static final int GRIDMIX_JOBMONITOR_SLEEPTIME_MILLIS_DEFAULT = 500;
/**
* The configuration key which determines the total number of job-status
* monitoring threads.
*/
public static final String GRIDMIX_JOBMONITOR_THREADS =
"gridmix.job-monitor.thread-count";
/**
* Default value for {@link #GRIDMIX_JOBMONITOR_THREADS}.
*/
public static final int GRIDMIX_JOBMONITOR_THREADS_DEFAULT = 1;
/**
* Configuration property set in simulated job's configuration whose value is
* set to the corresponding original job's name. This is not configurable by
* gridmix user.
*/
public static final String ORIGINAL_JOB_NAME =
"gridmix.job.original-job-name";
/**
* Configuration property set in simulated job's configuration whose value is
* set to the corresponding original job's id. This is not configurable by
* gridmix user.
*/
public static final String ORIGINAL_JOB_ID = "gridmix.job.original-job-id";
private DistributedCacheEmulator distCacheEmulator;
// Submit data structures
@SuppressWarnings("rawtypes")
private JobFactory factory;
private JobSubmitter submitter;
private JobMonitor monitor;
private Statistics statistics;
private Summarizer summarizer;
// Shutdown hook
private final Shutdown sdh = new Shutdown();
/** Error while parsing/analyzing the arguments to Gridmix */
static final int ARGS_ERROR = 1;
/** Error while trying to start/setup the Gridmix run */
static final int STARTUP_FAILED_ERROR = 2;
/**
* If at least 1 distributed cache file is missing in the expected
* distributed cache dir, Gridmix cannot proceed with emulation of
* distributed cache load.
*/
static final int MISSING_DIST_CACHE_FILES_ERROR = 3;
Gridmix(String[] args) {
summarizer = new Summarizer(args);
}
public Gridmix() {
summarizer = new Summarizer();
}
// Get the input data directory for Gridmix. Input directory is
// /input
static Path getGridmixInputDataPath(Path ioPath) {
return new Path(ioPath, "input");
}
/**
* Write random bytes at the path <inputDir> if needed.
* @see org.apache.hadoop.mapred.gridmix.GenerateData
* @return exit status
*/
@SuppressWarnings("deprecation")
protected int writeInputData(long genbytes, Path inputDir)
throws IOException, InterruptedException {
if (genbytes > 0) {
final Configuration conf = getConf();
if (inputDir.getFileSystem(conf).exists(inputDir)) {
LOG.error("Gridmix input data directory " + inputDir
+ " already exists when -generate option is used.\n");
return STARTUP_FAILED_ERROR;
}
// configure the compression ratio if needed
CompressionEmulationUtil.setupDataGeneratorConfig(conf);
final GenerateData genData = new GenerateData(conf, inputDir, genbytes);
LOG.info("Generating " + StringUtils.humanReadableInt(genbytes) +
" of test data...");
launchGridmixJob(genData);
FsShell shell = new FsShell(conf);
try {
LOG.info("Changing the permissions for inputPath " + inputDir.toString());
shell.run(new String[] {"-chmod","-R","777", inputDir.toString()});
} catch (Exception e) {
LOG.error("Couldnt change the file permissions " , e);
throw new IOException(e);
}
LOG.info("Input data generation successful.");
}
return 0;
}
/**
* Write random bytes in the distributed cache files that will be used by all
* simulated jobs of current gridmix run, if files are to be generated.
* Do this as part of the MapReduce job {@link GenerateDistCacheData#JOB_NAME}
* @see org.apache.hadoop.mapred.gridmix.GenerateDistCacheData
*/
protected void writeDistCacheData(Configuration conf)
throws IOException, InterruptedException {
int fileCount =
conf.getInt(GenerateDistCacheData.GRIDMIX_DISTCACHE_FILE_COUNT, -1);
if (fileCount > 0) {// generate distributed cache files
final GridmixJob genDistCacheData = new GenerateDistCacheData(conf);
LOG.info("Generating distributed cache data of size " + conf.getLong(
GenerateDistCacheData.GRIDMIX_DISTCACHE_BYTE_COUNT, -1));
launchGridmixJob(genDistCacheData);
}
}
// Launch Input/DistCache Data Generation job and wait for completion
void launchGridmixJob(GridmixJob job)
throws IOException, InterruptedException {
submitter.add(job);
// TODO add listeners, use for job dependencies
try {
while (!job.isSubmitted()) {
try {
Thread.sleep(100); // sleep
} catch (InterruptedException ie) {}
}
// wait for completion
job.getJob().waitForCompletion(false);
} catch (ClassNotFoundException e) {
throw new IOException("Internal error", e);
}
if (!job.getJob().isSuccessful()) {
throw new IOException(job.getJob().getJobName() + " job failed!");
}
}
/**
* Create an appropriate {@code JobStoryProducer} object for the
* given trace.
*
* @param traceIn the path to the trace file. The special path
* "-" denotes the standard input stream.
*
* @param conf the configuration to be used.
*
* @throws IOException if there was an error.
*/
protected JobStoryProducer createJobStoryProducer(String traceIn,
Configuration conf) throws IOException {
if ("-".equals(traceIn)) {
return new ZombieJobProducer(System.in, null);
}
return new ZombieJobProducer(new Path(traceIn), null, conf);
}
// get the gridmix job submission policy
protected static GridmixJobSubmissionPolicy getJobSubmissionPolicy(
Configuration conf) {
return GridmixJobSubmissionPolicy.getPolicy(conf,
GridmixJobSubmissionPolicy.STRESS);
}
/**
* Create each component in the pipeline and start it.
* @param conf Configuration data, no keys specific to this context
* @param traceIn Either a Path to the trace data or "-" for
* stdin
* @param ioPath <ioPath>/input/ is the dir from which input data is
* read and <ioPath>/distributedCache/ is the gridmix
* distributed cache directory.
* @param scratchDir Path into which job output is written
* @param startFlag Semaphore for starting job trace pipeline
*/
@SuppressWarnings("unchecked")
private void startThreads(Configuration conf, String traceIn, Path ioPath,
Path scratchDir, CountDownLatch startFlag, UserResolver userResolver)
throws IOException {
try {
Path inputDir = getGridmixInputDataPath(ioPath);
GridmixJobSubmissionPolicy policy = getJobSubmissionPolicy(conf);
LOG.info(" Submission policy is " + policy.name());
statistics = new Statistics(conf, policy.getPollingInterval(), startFlag);
monitor = createJobMonitor(statistics, conf);
int noOfSubmitterThreads =
(policy == GridmixJobSubmissionPolicy.SERIAL)
? 1
: Runtime.getRuntime().availableProcessors() + 1;
int numThreads = conf.getInt(GRIDMIX_SUB_THR, noOfSubmitterThreads);
int queueDep = conf.getInt(GRIDMIX_QUE_DEP, 5);
submitter = createJobSubmitter(monitor, numThreads, queueDep,
new FilePool(conf, inputDir), userResolver,
statistics);
distCacheEmulator = new DistributedCacheEmulator(conf, ioPath);
factory = createJobFactory(submitter, traceIn, scratchDir, conf,
startFlag, userResolver);
factory.jobCreator.setDistCacheEmulator(distCacheEmulator);
if (policy == GridmixJobSubmissionPolicy.SERIAL) {
statistics.addJobStatsListeners(factory);
} else {
statistics.addClusterStatsObservers(factory);
}
// add the gridmix run summarizer to the statistics
statistics.addJobStatsListeners(summarizer.getExecutionSummarizer());
statistics.addClusterStatsObservers(summarizer.getClusterSummarizer());
monitor.start();
submitter.start();
}catch(Exception e) {
LOG.error(" Exception at start " ,e);
throw new IOException(e);
}
}
protected JobMonitor createJobMonitor(Statistics stats, Configuration conf)
throws IOException {
int delay = conf.getInt(GRIDMIX_JOBMONITOR_SLEEPTIME_MILLIS,
GRIDMIX_JOBMONITOR_SLEEPTIME_MILLIS_DEFAULT);
int numThreads = conf.getInt(GRIDMIX_JOBMONITOR_THREADS,
GRIDMIX_JOBMONITOR_THREADS_DEFAULT);
return new JobMonitor(delay, TimeUnit.MILLISECONDS, stats, numThreads);
}
protected JobSubmitter createJobSubmitter(JobMonitor monitor, int threads,
int queueDepth, FilePool pool, UserResolver resolver,
Statistics statistics) throws IOException {
return new JobSubmitter(monitor, threads, queueDepth, pool, statistics);
}
@SuppressWarnings("rawtypes")
protected JobFactory createJobFactory(JobSubmitter submitter, String traceIn,
Path scratchDir, Configuration conf, CountDownLatch startFlag,
UserResolver resolver)
throws IOException {
return GridmixJobSubmissionPolicy.getPolicy(
conf, GridmixJobSubmissionPolicy.STRESS).createJobFactory(
submitter, createJobStoryProducer(traceIn, conf), scratchDir, conf,
startFlag, resolver);
}
private static UserResolver userResolver;
public UserResolver getCurrentUserResolver() {
return userResolver;
}
public int run(final String[] argv) throws IOException, InterruptedException {
int val = -1;
final Configuration conf = getConf();
UserGroupInformation.setConfiguration(conf);
UserGroupInformation ugi = UserGroupInformation.getLoginUser();
val = ugi.doAs(new PrivilegedExceptionAction() {
public Integer run() throws Exception {
return runJob(conf, argv);
}
});
// print the gridmix summary if the run was successful
if (val == 0) {
// print the run summary
System.out.print("\n\n");
System.out.println(summarizer.toString());
}
return val;
}
@SuppressWarnings("deprecation")
private int runJob(Configuration conf, String[] argv)
throws IOException, InterruptedException {
if (argv.length < 2) {
LOG.error("Too few arguments to Gridmix.\n");
printUsage(System.err);
return ARGS_ERROR;
}
long genbytes = -1L;
String traceIn = null;
Path ioPath = null;
URI userRsrc = null;
try {
userResolver = ReflectionUtils.newInstance(conf.getClass(GRIDMIX_USR_RSV,
SubmitterUserResolver.class, UserResolver.class), conf);
for (int i = 0; i < argv.length - 2; ++i) {
if ("-generate".equals(argv[i])) {
genbytes = StringUtils.TraditionalBinaryPrefix.string2long(argv[++i]);
if (genbytes <= 0) {
LOG.error("size of input data to be generated specified using "
+ "-generate option should be nonnegative.\n");
return ARGS_ERROR;
}
} else if ("-users".equals(argv[i])) {
userRsrc = new URI(argv[++i]);
} else {
LOG.error("Unknown option " + argv[i] + " specified.\n");
printUsage(System.err);
return ARGS_ERROR;
}
}
if (userResolver.needsTargetUsersList()) {
if (userRsrc != null) {
if (!userResolver.setTargetUsers(userRsrc, conf)) {
LOG.warn("Ignoring the user resource '" + userRsrc + "'.");
}
} else {
LOG.error(userResolver.getClass()
+ " needs target user list. Use -users option.\n");
printUsage(System.err);
return ARGS_ERROR;
}
} else if (userRsrc != null) {
LOG.warn("Ignoring the user resource '" + userRsrc + "'.");
}
ioPath = new Path(argv[argv.length - 2]);
traceIn = argv[argv.length - 1];
} catch (Exception e) {
LOG.error(e.toString() + "\n");
if (LOG.isDebugEnabled()) {
e.printStackTrace();
}
printUsage(System.err);
return ARGS_ERROR;
}
// Create with 777 permissions
final FileSystem inputFs = ioPath.getFileSystem(conf);
ioPath = ioPath.makeQualified(inputFs);
boolean succeeded = false;
try {
succeeded = FileSystem.mkdirs(inputFs, ioPath,
new FsPermission((short)0777));
} catch(IOException e) {
// No need to emit this exception message
} finally {
if (!succeeded) {
LOG.error("Failed creation of directory " + ioPath + "\n");
return STARTUP_FAILED_ERROR;
}
}
return start(conf, traceIn, ioPath, genbytes, userResolver);
}
/**
*
* @param conf gridmix configuration
* @param traceIn trace file path(if it is '-', then trace comes from the
* stream stdin)
* @param ioPath Working directory for gridmix. GenerateData job
* will generate data in the directory <ioPath>/input/ and
* distributed cache data is generated in the directory
* <ioPath>/distributedCache/, if -generate option is
* specified.
* @param genbytes size of input data to be generated under the directory
* <ioPath>/input/
* @param userResolver gridmix user resolver
* @return exit code
* @throws IOException
* @throws InterruptedException
*/
int start(Configuration conf, String traceIn, Path ioPath, long genbytes,
UserResolver userResolver)
throws IOException, InterruptedException {
DataStatistics stats = null;
InputStream trace = null;
int exitCode = 0;
try {
Path scratchDir = new Path(ioPath, conf.get(GRIDMIX_OUT_DIR, "gridmix"));
// add shutdown hook for SIGINT, etc.
Runtime.getRuntime().addShutdownHook(sdh);
CountDownLatch startFlag = new CountDownLatch(1);
try {
// Create, start job submission threads
startThreads(conf, traceIn, ioPath, scratchDir, startFlag,
userResolver);
Path inputDir = getGridmixInputDataPath(ioPath);
// Write input data if specified
exitCode = writeInputData(genbytes, inputDir);
if (exitCode != 0) {
return exitCode;
}
// publish the data statistics
stats = GenerateData.publishDataStatistics(inputDir, genbytes, conf);
// scan input dir contents
submitter.refreshFilePool();
boolean shouldGenerate = (genbytes > 0);
// set up the needed things for emulation of various loads
exitCode = setupEmulation(conf, traceIn, scratchDir, ioPath,
shouldGenerate);
if (exitCode != 0) {
return exitCode;
}
// start the summarizer
summarizer.start(conf);
factory.start();
statistics.start();
} catch (Throwable e) {
LOG.error("Startup failed. " + e.toString() + "\n");
if (LOG.isDebugEnabled()) {
e.printStackTrace();
}
if (factory != null) factory.abort(); // abort pipeline
exitCode = STARTUP_FAILED_ERROR;
} finally {
// signal for factory to start; sets start time
startFlag.countDown();
}
if (factory != null) {
// wait for input exhaustion
factory.join(Long.MAX_VALUE);
final Throwable badTraceException = factory.error();
if (null != badTraceException) {
LOG.error("Error in trace", badTraceException);
throw new IOException("Error in trace", badTraceException);
}
// wait for pending tasks to be submitted
submitter.shutdown();
submitter.join(Long.MAX_VALUE);
// wait for running tasks to complete
monitor.shutdown();
monitor.join(Long.MAX_VALUE);
statistics.shutdown();
statistics.join(Long.MAX_VALUE);
}
} finally {
if (factory != null) {
summarizer.finalize(factory, traceIn, genbytes, userResolver, stats,
conf);
}
IOUtils.cleanup(LOG, trace);
}
return exitCode;
}
/**
* Create gridmix output directory. Setup things for emulation of
* various loads, if needed.
* @param conf gridmix configuration
* @param traceIn trace file path(if it is '-', then trace comes from the
* stream stdin)
* @param scratchDir gridmix output directory
* @param ioPath Working directory for gridmix.
* @param generate true if -generate option was specified
* @return exit code
* @throws IOException
* @throws InterruptedException
*/
private int setupEmulation(Configuration conf, String traceIn,
Path scratchDir, Path ioPath, boolean generate)
throws IOException, InterruptedException {
// create scratch directory(output directory of gridmix)
final FileSystem scratchFs = scratchDir.getFileSystem(conf);
FileSystem.mkdirs(scratchFs, scratchDir, new FsPermission((short) 0777));
// Setup things needed for emulation of distributed cache load
return setupDistCacheEmulation(conf, traceIn, ioPath, generate);
// Setup emulation of other loads like CPU load, Memory load
}
/**
* Setup gridmix for emulation of distributed cache load. This includes
* generation of distributed cache files, if needed.
* @param conf gridmix configuration
* @param traceIn trace file path(if it is '-', then trace comes from the
* stream stdin)
* @param ioPath <ioPath>/input/ is the dir where input data (a) exists
* or (b) is generated. <ioPath>/distributedCache/ is the
* folder where distributed cache data (a) exists or (b) is to be
* generated by gridmix.
* @param generate true if -generate option was specified
* @return exit code
* @throws IOException
* @throws InterruptedException
*/
private int setupDistCacheEmulation(Configuration conf, String traceIn,
Path ioPath, boolean generate) throws IOException, InterruptedException {
distCacheEmulator.init(traceIn, factory.jobCreator, generate);
int exitCode = 0;
if (distCacheEmulator.shouldGenerateDistCacheData() ||
distCacheEmulator.shouldEmulateDistCacheLoad()) {
JobStoryProducer jsp = createJobStoryProducer(traceIn, conf);
exitCode = distCacheEmulator.setupGenerateDistCacheData(jsp);
if (exitCode == 0) {
// If there are files to be generated, run a MapReduce job to generate
// these distributed cache files of all the simulated jobs of this trace.
writeDistCacheData(conf);
}
}
return exitCode;
}
/**
* Handles orderly shutdown by requesting that each component in the
* pipeline abort its progress, waiting for each to exit and killing
* any jobs still running on the cluster.
*/
class Shutdown extends Thread {
static final long FAC_SLEEP = 1000;
static final long SUB_SLEEP = 4000;
static final long MON_SLEEP = 15000;
private void killComponent(Component component, long maxwait) {
if (component == null) {
return;
}
component.abort();
try {
component.join(maxwait);
} catch (InterruptedException e) {
LOG.warn("Interrupted waiting for " + component);
}
}
@Override
public void run() {
LOG.info("Exiting...");
try {
killComponent(factory, FAC_SLEEP); // read no more tasks
killComponent(submitter, SUB_SLEEP); // submit no more tasks
killComponent(monitor, MON_SLEEP); // process remaining jobs here
killComponent(statistics,MON_SLEEP);
} finally {
if (monitor == null) {
return;
}
List remainingJobs = monitor.getRemainingJobs();
if (remainingJobs.isEmpty()) {
return;
}
LOG.info("Killing running jobs...");
for (JobStats stats : remainingJobs) {
Job job = stats.getJob();
try {
if (!job.isComplete()) {
job.killJob();
LOG.info("Killed " + job.getJobName() + " (" + job.getJobID() + ")");
} else {
if (job.isSuccessful()) {
monitor.onSuccess(job);
} else {
monitor.onFailure(job);
}
}
} catch (IOException e) {
LOG.warn("Failure killing " + job.getJobName(), e);
} catch (Exception e) {
LOG.error("Unexpected exception", e);
}
}
LOG.info("Done.");
}
}
}
public static void main(String[] argv) throws Exception {
int res = -1;
try {
res = ToolRunner.run(new Configuration(), new Gridmix(argv), argv);
} finally {
ExitUtil.terminate(res);
}
}
private String getEnumValues(Enum[] e) {
StringBuilder sb = new StringBuilder();
String sep = "";
for (Enum v : e) {
sb.append(sep);
sb.append(v.name());
sep = "|";
}
return sb.toString();
}
private String getJobTypes() {
return getEnumValues(JobCreator.values());
}
private String getSubmissionPolicies() {
return getEnumValues(GridmixJobSubmissionPolicy.values());
}
protected void printUsage(PrintStream out) {
ToolRunner.printGenericCommandUsage(out);
out.println("Usage: gridmix [-generate ] [-users URI] [-Dname=value ...] ");
out.println(" e.g. gridmix -generate 100m foo -");
out.println("Options:");
out.println(" -generate : Generate input data of size MiB under "
+ "/input/ and generate\n\t\t distributed cache data under "
+ "/distributedCache/.");
out.println(" -users : URI that contains the users list.");
out.println("Configuration parameters:");
out.println(" General parameters:");
out.printf(" %-48s : Output directory%n", GRIDMIX_OUT_DIR);
out.printf(" %-48s : Submitting threads%n", GRIDMIX_SUB_THR);
out.printf(" %-48s : Queued job desc%n", GRIDMIX_QUE_DEP);
out.printf(" %-48s : User resolution class%n", GRIDMIX_USR_RSV);
out.printf(" %-48s : Job types (%s)%n", JobCreator.GRIDMIX_JOB_TYPE, getJobTypes());
out.println(" Parameters related to job submission:");
out.printf(" %-48s : Default queue%n",
GridmixJob.GRIDMIX_DEFAULT_QUEUE);
out.printf(" %-48s : Enable/disable using queues in trace%n",
GridmixJob.GRIDMIX_USE_QUEUE_IN_TRACE);
out.printf(" %-48s : Job submission policy (%s)%n",
GridmixJobSubmissionPolicy.JOB_SUBMISSION_POLICY, getSubmissionPolicies());
out.println(" Parameters specific for LOADJOB:");
out.printf(" %-48s : Key fraction of rec%n",
AvgRecordFactory.GRIDMIX_KEY_FRC);
out.println(" Parameters specific for SLEEPJOB:");
out.printf(" %-48s : Whether to ignore reduce tasks%n",
SleepJob.SLEEPJOB_MAPTASK_ONLY);
out.printf(" %-48s : Number of fake locations for map tasks%n",
JobCreator.SLEEPJOB_RANDOM_LOCATIONS);
out.printf(" %-48s : Maximum map task runtime in mili-sec%n",
SleepJob.GRIDMIX_SLEEP_MAX_MAP_TIME);
out.printf(" %-48s : Maximum reduce task runtime in mili-sec (merge+reduce)%n",
SleepJob.GRIDMIX_SLEEP_MAX_REDUCE_TIME);
out.println(" Parameters specific for STRESS submission throttling policy:");
out.printf(" %-48s : jobs vs task-tracker ratio%n",
StressJobFactory.CONF_MAX_JOB_TRACKER_RATIO);
out.printf(" %-48s : maps vs map-slot ratio%n",
StressJobFactory.CONF_OVERLOAD_MAPTASK_MAPSLOT_RATIO);
out.printf(" %-48s : reduces vs reduce-slot ratio%n",
StressJobFactory.CONF_OVERLOAD_REDUCETASK_REDUCESLOT_RATIO);
out.printf(" %-48s : map-slot share per job%n",
StressJobFactory.CONF_MAX_MAPSLOT_SHARE_PER_JOB);
out.printf(" %-48s : reduce-slot share per job%n",
StressJobFactory.CONF_MAX_REDUCESLOT_SHARE_PER_JOB);
}
/**
* Components in the pipeline must support the following operations for
* orderly startup and shutdown.
*/
interface Component {
/**
* Accept an item into this component from an upstream component. If
* shutdown or abort have been called, this may fail, depending on the
* semantics for the component.
*/
void add(T item) throws InterruptedException;
/**
* Attempt to start the service.
*/
void start();
/**
* Wait until the service completes. It is assumed that either a
* {@link #shutdown} or {@link #abort} has been requested.
*/
void join(long millis) throws InterruptedException;
/**
* Shut down gracefully, finishing all pending work. Reject new requests.
*/
void shutdown();
/**
* Shut down immediately, aborting any work in progress and discarding
* all pending work. It is legal to store pending work for another
* thread to process.
*/
void abort();
}
// it is need for tests
protected Summarizer getSummarizer() {
return summarizer;
}
}
