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HBASE-938 major compaction period is not checked periodically 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@714200 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2008-11-15 00:36:27 +00:00
parent b5bdaf2c1f
commit 79be2d87f7
8 changed files with 241 additions and 80 deletions
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1
CHANGES.txt
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@ -119,6 +119,7 @@ Release 0.19.0 - Unreleased
HBASE-998 Narrow getClosestRowBefore by passing column family
HBASE-999 Up versions on historian and keep history of deleted regions for a
while rather than delete immediately
HBASE-938 Major compaction period is not checked periodically
NEW FEATURES
HBASE-875 Use MurmurHash instead of JenkinsHash [in bloomfilters]

9
src/java/org/apache/hadoop/hbase/regionserver/CompactSplitThread.java
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@ -117,13 +117,16 @@ class CompactSplitThread extends Thread implements HConstants {
/**
* @param r HRegion store belongs to
* @param why Why compaction requested -- used in debug messages
*/
public synchronized void compactionRequested(HRegion r) {
public synchronized void compactionRequested(final HRegion r,
final String why) {
if (this.server.stopRequested.get()) {
return;
}
LOG.debug("Compaction requested for region: " +
Bytes.toString(r.getRegionName()));
LOG.debug("Compaction requested for region " +
Bytes.toString(r.getRegionName()) +
(why != null && !why.isEmpty()? " because: " + why: ""));
synchronized (regionsInQueue) {
if (!regionsInQueue.contains(r)) {
compactionQueue.add(r);

22
src/java/org/apache/hadoop/hbase/regionserver/HRegion.java
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@ -1336,8 +1336,8 @@ public class HRegion implements HConstants {
try {
for (HStore store : stores.values()) {
List<HStoreKey> keys =
store.getKeys(new HStoreKey(row, ts, this.regionInfo), ALL_VERSIONS,
now, null);
store.getKeys(new HStoreKey(row, ts, this.regionInfo),
ALL_VERSIONS, now, null);
TreeMap<HStoreKey, byte []> edits = new TreeMap<HStoreKey, byte []>(
new HStoreKey.HStoreKeyWritableComparator(regionInfo));
for (HStoreKey key: keys) {
@ -1369,7 +1369,8 @@ public class HRegion implements HConstants {
long now = System.currentTimeMillis();
try {
for (HStore store : stores.values()) {
List<HStoreKey> keys = store.getKeys(new HStoreKey(row, timestamp, this.regionInfo),
List<HStoreKey> keys =
store.getKeys(new HStoreKey(row, timestamp, this.regionInfo),
ALL_VERSIONS, now, columnPattern);
TreeMap<HStoreKey, byte []> edits = new TreeMap<HStoreKey, byte []>(
new HStoreKey.HStoreKeyWritableComparator(regionInfo));
@ -2400,6 +2401,19 @@ public class HRegion implements HConstants {
static void listFiles(FileSystem fs, HRegion r) throws IOException {
listPaths(fs, r.getRegionDir());
}
/**
* @return True if needs a mojor compaction.
* @throws IOException
*/
boolean isMajorCompaction() throws IOException {
for (HStore store: this.stores.values()) {
if (store.isMajorCompaction()) {
return true;
}
}
return false;
}
/*
* List the files under the specified directory
@ -2425,4 +2439,4 @@ public class HRegion implements HConstants {
}
}
}
}
}

132
src/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
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@ -52,6 +52,7 @@ import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.Chore;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
@ -174,32 +175,6 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
private final LinkedList<byte[]> reservedSpace = new LinkedList<byte []>();
private RegionServerMetrics metrics;
/**
* Thread to shutdown the region server in an orderly manner. This thread
* is registered as a shutdown hook in the HRegionServer constructor and is
* only called when the HRegionServer receives a kill signal.
*/
class ShutdownThread extends Thread {
private final HRegionServer instance;
/**
* @param instance
*/
public ShutdownThread(HRegionServer instance) {
this.instance = instance;
}
@Override
public void run() {
LOG.info("Starting shutdown thread.");
// tell the region server to stop and wait for it to complete
instance.stop();
instance.join();
LOG.info("Shutdown thread complete");
}
}
// Compactions
final CompactSplitThread compactSplitThread;
@ -207,6 +182,10 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
// Cache flushing
final MemcacheFlusher cacheFlusher;
/* Check for major compactions.
*/
final Chore majorCompactionChecker;
// HLog and HLog roller. log is protected rather than private to avoid
// eclipse warning when accessed by inner classes
protected volatile HLog log;
@ -260,6 +239,13 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
// Log flushing thread
this.logFlusher =
new LogFlusher(this.threadWakeFrequency, this.stopRequested);
// Background thread to check for major compactions; needed if region
// has not gotten updates in a while. Make it run at a lesser frequency.
int multiplier = this.conf.getInt(THREAD_WAKE_FREQUENCY +
".multiplier", 1000);
this.majorCompactionChecker = new MajorCompactionChecker(this,
this.threadWakeFrequency * multiplier, this.stopRequested);
// Task thread to process requests from Master
this.worker = new Worker();
@ -474,6 +460,7 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
logFlusher.interrupt();
compactSplitThread.interruptIfNecessary();
logRoller.interruptIfNecessary();
this.majorCompactionChecker.interrupt();
if (abortRequested) {
if (this.fsOk) {
@ -571,6 +558,66 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
throw ex;
}
}
/*
* Thread to shutdown the region server in an orderly manner. This thread
* is registered as a shutdown hook in the HRegionServer constructor and is
* only called when the HRegionServer receives a kill signal.
*/
private static class ShutdownThread extends Thread {
private final Log LOG = LogFactory.getLog(this.getClass());
private final HRegionServer instance;
/**
* @param instance
*/
public ShutdownThread(HRegionServer instance) {
this.instance = instance;
}
@Override
public void run() {
LOG.info("Starting shutdown thread.");
// tell the region server to stop and wait for it to complete
instance.stop();
instance.join();
LOG.info("Shutdown thread complete");
}
}
/*
* Inner class that runs on a long period checking if regions need major
* compaction.
*/
private static class MajorCompactionChecker extends Chore {
private final Log LOG = LogFactory.getLog(this.getClass());
private final HRegionServer instance;
MajorCompactionChecker(final HRegionServer h,
final int sleepTime, final AtomicBoolean stopper) {
super(sleepTime, stopper);
this.instance = h;
LOG.info("Runs every " + sleepTime + "ms");
}
@Override
protected void chore() {
Set<Integer> keys = this.instance.onlineRegions.keySet();
for (Integer i: keys) {
HRegion r = this.instance.onlineRegions.get(i);
try {
if (r != null && r.isMajorCompaction()) {
// Queue a compaction. Will recognize if major is needed.
this.instance.compactSplitThread.
compactionRequested(r, getName() + " requests major compaction");
}
} catch (IOException e) {
LOG.warn("Failed major compaction check on " + r, e);
}
}
}
};
/**
* Report the status of the server. A server is online once all the startup
@ -660,6 +707,9 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
Threads.setDaemonThreadRunning(this.compactSplitThread, n + ".compactor",
handler);
Threads.setDaemonThreadRunning(this.workerThread, n + ".worker", handler);
Threads.setDaemonThreadRunning(this.majorCompactionChecker,
n + ".majorCompactionChecker", handler);
// Leases is not a Thread. Internally it runs a daemon thread. If it gets
// an unhandled exception, it will just exit.
this.leases.setName(n + ".leaseChecker");
@ -690,7 +740,7 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
// Verify that all threads are alive
if (!(leases.isAlive() && compactSplitThread.isAlive() &&
cacheFlusher.isAlive() && logRoller.isAlive() &&
workerThread.isAlive())) {
workerThread.isAlive() && this.majorCompactionChecker.isAlive())) {
// One or more threads are no longer alive - shut down
stop();
return false;
@ -750,20 +800,11 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
* Presumption is that all closes and stops have already been called.
*/
void join() {
join(this.workerThread);
join(this.cacheFlusher);
join(this.compactSplitThread);
join(this.logRoller);
}
private void join(final Thread t) {
while (t.isAlive()) {
try {
t.join();
} catch (InterruptedException e) {
// continue
}
}
Threads.shutdown(this.majorCompactionChecker);
Threads.shutdown(this.workerThread);
Threads.shutdown(this.cacheFlusher);
Threads.shutdown(this.compactSplitThread);
Threads.shutdown(this.logRoller);
}
/*
@ -925,13 +966,15 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
// Force split a region
HRegion region = getRegion(info.getRegionName());
region.regionInfo.shouldSplit(true);
compactSplitThread.compactionRequested(region);
compactSplitThread.compactionRequested(region,
"MSG_REGION_SPLIT");
} break;
case MSG_REGION_COMPACT: {
// Compact a region
HRegion region = getRegion(info.getRegionName());
compactSplitThread.compactionRequested(region);
compactSplitThread.compactionRequested(region,
"MSG_REGION_COMPACT");
} break;
default:
@ -983,7 +1026,8 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
try {
region = instantiateRegion(regionInfo);
// Startup a compaction early if one is needed.
this.compactSplitThread.compactionRequested(region);
this.compactSplitThread.
compactionRequested(region, "Region open check");
} catch (IOException e) {
LOG.error("error opening region " + regionInfo.getRegionNameAsString(), e);

66
src/java/org/apache/hadoop/hbase/regionserver/HStore.java
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@ -435,6 +435,7 @@ public class HStore implements HConstants {
curfile = new HStoreFile(conf, fs, basedir, this.info,
family.getName(), fid, reference);
long storeSeqId = -1;
boolean majorCompaction = false;
try {
storeSeqId = curfile.loadInfo(fs);
if (storeSeqId > this.maxSeqId) {
@ -488,7 +489,9 @@ public class HStore implements HConstants {
// Found map and sympathetic info file. Add this hstorefile to result.
if (LOG.isDebugEnabled()) {
LOG.debug("loaded " + FSUtils.getPath(p) + ", isReference=" +
isReference + ", sequence id=" + storeSeqId + ", length=" + length);
isReference + ", sequence id=" + storeSeqId +
", length=" + length + ", majorCompaction=" +
curfile.isMajorCompaction());
}
results.put(Long.valueOf(storeSeqId), curfile);
// Keep list of sympathetic data mapfiles for cleaning info dir in next
@ -691,7 +694,8 @@ public class HStore implements HConstants {
" with " + entries +
" entries, sequence id " + logCacheFlushId + ", data size " +
StringUtils.humanReadableInt(flushed) + ", file size " +
StringUtils.humanReadableInt(newStoreSize));
StringUtils.humanReadableInt(newStoreSize) + " to " +
this.info.getRegionNameAsString());
}
}
return storefiles.size() >= compactionThreshold;
@ -832,11 +836,11 @@ public class HStore implements HConstants {
// Check to see if we need to do a major compaction on this region.
// If so, change doMajorCompaction to true to skip the incremental
// compacting below. Only check if doMajorCompaction is not true.
long lastMajorCompaction = 0L;
if (!doMajorCompaction) {
doMajorCompaction = isMajorCompaction();
doMajorCompaction = isMajorCompaction(filesToCompact);
}
if (!doMajorCompaction && !hasReferences(filesToCompact) &&
boolean references = hasReferences(filesToCompact);
if (!doMajorCompaction && !references &&
filesToCompact.size() < compactionThreshold) {
return checkSplit(forceSplit);
}
@ -862,7 +866,7 @@ public class HStore implements HConstants {
fileSizes[i] = len;
totalSize += len;
}
if (!doMajorCompaction && !hasReferences(filesToCompact)) {
if (!doMajorCompaction && !references) {
// Here we select files for incremental compaction.
// The rule is: if the largest(oldest) one is more than twice the
// size of the second, skip the largest, and continue to next...,
@ -888,7 +892,7 @@ public class HStore implements HConstants {
if (LOG.isDebugEnabled()) {
LOG.debug("Compaction size of " + this.storeNameStr + ": " +
StringUtils.humanReadableInt(totalSize) + "; Skipped " + point +
" files , size: " + skipped);
" file(s), size: " + skipped);
}
}
@ -904,7 +908,8 @@ public class HStore implements HConstants {
HStoreFile compactedOutputFile = new HStoreFile(conf, fs,
this.compactionDir, this.info, family.getName(), -1L, null);
if (LOG.isDebugEnabled()) {
LOG.debug("started compaction of " + rdrs.size() + " files into " +
LOG.debug("Started compaction of " + rdrs.size() + " file(s)" +
(references? "(hasReferences=true)": " ") + " into " +
FSUtils.getPath(compactedOutputFile.getMapFilePath()));
}
MapFile.Writer writer = compactedOutputFile.getWriter(this.fs,
@ -917,15 +922,14 @@ public class HStore implements HConstants {
}
// Now, write out an HSTORE_LOGINFOFILE for the brand-new TreeMap.
compactedOutputFile.writeInfo(fs, maxId);
compactedOutputFile.writeInfo(fs, maxId, doMajorCompaction);
// Move the compaction into place.
completeCompaction(filesToCompact, compactedOutputFile);
if (LOG.isDebugEnabled()) {
LOG.debug("Completed compaction of " + this.storeNameStr +
" store size is " + StringUtils.humanReadableInt(storeSize) +
(doMajorCompaction? "": "; time since last major compaction: " +
(lastMajorCompaction/1000) + " seconds"));
LOG.debug("Completed " + (doMajorCompaction? "major": "") +
" compaction of " + this.storeNameStr +
" store size is " + StringUtils.humanReadableInt(storeSize));
}
}
return checkSplit(forceSplit);
@ -955,19 +959,40 @@ public class HStore implements HConstants {
/*
* @return True if we should run a major compaction.
*/
private boolean isMajorCompaction() throws IOException {
boolean isMajorCompaction() throws IOException {
return isMajorCompaction(null);
}
/*
* @param filesToCompact Files to compact. Can be null.
* @return True if we should run a major compaction.
*/
private boolean isMajorCompaction(final List<HStoreFile> filesToCompact)
throws IOException {
boolean result = false;
Path mapdir = HStoreFile.getMapDir(this.basedir, this.info.getEncodedName(),
this.family.getName());
long lowTimestamp = getLowestTimestamp(fs, mapdir);
if (lowTimestamp < (System.currentTimeMillis() - this.majorCompactionTime) &&
lowTimestamp > 0l) {
if (LOG.isDebugEnabled()) {
LOG.debug("Major compaction triggered on store: " +
this.storeNameStr + ". Time since last major compaction: " +
((System.currentTimeMillis() - lowTimestamp)/1000) + " seconds");
// Major compaction time has elapsed.
long elapsedTime = System.currentTimeMillis() - lowTimestamp;
if (filesToCompact != null && filesToCompact.size() == 1 &&
filesToCompact.get(0).isMajorCompaction() &&
(this.ttl == HConstants.FOREVER || elapsedTime < this.ttl)) {
if (LOG.isDebugEnabled()) {
LOG.debug("Skipping major compaction because only one (major) " +
"compacted file only and elapsedTime " + elapsedTime +
" is < ttl=" + this.ttl);
}
} else {
if (LOG.isDebugEnabled()) {
LOG.debug("Major compaction triggered on store: " +
this.storeNameStr + ". Time since last major compaction: " +
((System.currentTimeMillis() - lowTimestamp)/1000) + " seconds");
}
result = true;
}
result = true;
}
return result;
}
@ -1160,7 +1185,8 @@ public class HStore implements HConstants {
try {
// 1. Moving the new MapFile into place.
HStoreFile finalCompactedFile = new HStoreFile(conf, fs, basedir,
this.info, family.getName(), -1, null);
this.info, family.getName(), -1, null,
compactedFile.isMajorCompaction());
if (LOG.isDebugEnabled()) {
LOG.debug("moving " + FSUtils.getPath(compactedFile.getMapFilePath()) +
" to " + FSUtils.getPath(finalCompactedFile.getMapFilePath()));

73
src/java/org/apache/hadoop/hbase/regionserver/HStoreFile.java
View File

@ -83,6 +83,7 @@ import org.apache.hadoop.io.SequenceFile;
public class HStoreFile implements HConstants {
static final Log LOG = LogFactory.getLog(HStoreFile.class.getName());
static final byte INFO_SEQ_NUM = 0;
static final byte MAJOR_COMPACTION = INFO_SEQ_NUM + 1;
static final String HSTORE_DATFILE_DIR = "mapfiles";
static final String HSTORE_INFO_DIR = "info";
static final String HSTORE_FILTER_DIR = "filter";
@ -97,6 +98,9 @@ public class HStoreFile implements HConstants {
private final FileSystem fs;
private final Reference reference;
private final HRegionInfo hri;
/* If true, this file was product of a major compaction.
*/
private boolean majorCompaction = false;
/**
* Constructor that fully initializes the object
@ -111,6 +115,24 @@ public class HStoreFile implements HConstants {
HStoreFile(HBaseConfiguration conf, FileSystem fs, Path basedir,
final HRegionInfo hri, byte [] colFamily, long fileId,
final Reference ref)
throws IOException {
this(conf, fs, basedir, hri, colFamily, fileId, ref, false);
}
/**
* Constructor that fully initializes the object
* @param conf Configuration object
* @param basedir qualified path that is parent of region directory
* @param colFamily name of the column family
* @param fileId file identifier
* @param ref Reference to another HStoreFile.
* @param hri The region info for this file (HACK HBASE-868). TODO: Fix.
* @param mc Try if this file was result of a major compression.
* @throws IOException
*/
HStoreFile(HBaseConfiguration conf, FileSystem fs, Path basedir,
final HRegionInfo hri, byte [] colFamily, long fileId,
final Reference ref, final boolean mc)
throws IOException {
this.conf = conf;
this.fs = fs;
@ -133,6 +155,7 @@ public class HStoreFile implements HConstants {
// If a reference, construction does not write the pointer files. Thats
// done by invocations of writeReferenceFiles(hsf, fs). Happens at split.
this.reference = ref;
this.majorCompaction = mc;
}
/** @return the region name */
@ -288,11 +311,11 @@ public class HStoreFile implements HConstants {
/**
* Reads in an info file
*
* @param fs file system
* @param filesystem file system
* @return The sequence id contained in the info file
* @throws IOException
*/
long loadInfo(FileSystem fs) throws IOException {
long loadInfo(final FileSystem filesystem) throws IOException {
Path p = null;
if (isReference()) {
p = getInfoFilePath(reference.getEncodedRegionName(),
@ -300,10 +323,18 @@ public class HStoreFile implements HConstants {
} else {
p = getInfoFilePath();
}
DataInputStream in = new DataInputStream(fs.open(p));
long length = filesystem.getFileStatus(p).getLen();
boolean hasMoreThanSeqNum = length > (Byte.SIZE + Bytes.SIZEOF_LONG);
DataInputStream in = new DataInputStream(filesystem.open(p));
try {
byte flag = in.readByte();
if(flag == INFO_SEQ_NUM) {
if (flag == INFO_SEQ_NUM) {
if (hasMoreThanSeqNum) {
flag = in.readByte();
if (flag == MAJOR_COMPACTION) {
this.majorCompaction = in.readBoolean();
}
}
return in.readLong();
}
throw new IOException("Cannot process log file: " + p);
@ -315,16 +346,37 @@ public class HStoreFile implements HConstants {
/**
* Writes the file-identifier to disk
*
* @param fs file system
* @param filesystem file system
* @param infonum file id
* @throws IOException
*/
void writeInfo(FileSystem fs, long infonum) throws IOException {
void writeInfo(final FileSystem filesystem, final long infonum)
throws IOException {
writeInfo(filesystem, infonum, false);
}
/**
* Writes the file-identifier to disk
*
* @param filesystem file system
* @param infonum file id
* @param mc True if this file is product of a major compaction
* @throws IOException
*/
void writeInfo(final FileSystem filesystem, final long infonum,
final boolean mc)
throws IOException {
Path p = getInfoFilePath();
FSDataOutputStream out = fs.create(p);
FSDataOutputStream out = filesystem.create(p);
try {
out.writeByte(INFO_SEQ_NUM);
out.writeLong(infonum);
if (mc) {
// Set whether major compaction flag on this file.
this.majorCompaction = mc;
out.writeByte(MAJOR_COMPACTION);
out.writeBoolean(mc);
}
} finally {
out.close();
}
@ -430,6 +482,13 @@ public class HStoreFile implements HConstants {
return encodedRegionName + "/" + Bytes.toString(colFamily) + "/" + fileId +
(isReference()? "-" + reference.toString(): "");
}
/**
* @return True if this file was made by a major compaction.
*/
public boolean isMajorCompaction() {
return this.majorCompaction;
}
private static String createHStoreFilename(final long fid,
final int encodedRegionName) {

2
src/java/org/apache/hadoop/hbase/regionserver/MemcacheFlusher.java
View File

@ -177,7 +177,7 @@ class MemcacheFlusher extends Thread implements FlushRequester {
// compact if removeFromQueue is true. Note that region.flushCache()
// only returns true if a flush is done and if a compaction is needed.
if (region.flushcache() && !removeFromQueue) {
server.compactSplitThread.compactionRequested(region);
server.compactSplitThread.compactionRequested(region, getName());
}
} catch (DroppedSnapshotException ex) {
// Cache flush can fail in a few places. If it fails in a critical

16
src/java/org/apache/hadoop/hbase/util/Threads.java
View File

@ -57,4 +57,18 @@ public class Threads {
t.start();
return t;
}
}
/**
* Shutdown passed thread using isAlive and join.
* @param t Thread to shutdown
*/
public static void shutdown(final Thread t) {
while (t.isAlive()) {
try {
t.join();
} catch (InterruptedException e) {
LOG.warn(t.getName(), e);
}
}
}
}