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HBASE-4765 Enhance HLog Metrics 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1200619 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nicolas Spiegelberg 2011-11-10 23:29:16 +00:00
parent 373c98b0df
commit 6c57076f7e
4 changed files with 93 additions and 47 deletions
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9
src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
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@ -26,6 +26,7 @@ import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.commons.logging.Log;
@ -142,15 +143,15 @@ public class HFile {
static final char CACHE_KEY_SEPARATOR = '_';
// For measuring latency of "typical" reads and writes
static volatile AtomicLong readOps = new AtomicLong();
static volatile AtomicInteger readOps = new AtomicInteger();
static volatile AtomicLong readTimeNano = new AtomicLong();
static volatile AtomicLong writeOps = new AtomicLong();
static volatile AtomicInteger writeOps = new AtomicInteger();
static volatile AtomicLong writeTimeNano = new AtomicLong();
// for test purpose
public static volatile AtomicLong dataBlockReadCnt = new AtomicLong(0);
public static final long getReadOps() {
public static final int getReadOps() {
return readOps.getAndSet(0);
}
@ -158,7 +159,7 @@ public class HFile {
return readTimeNano.getAndSet(0) / 1000000;
}
public static final long getWriteOps() {
public static final int getWriteOps() {
return writeOps.getAndSet(0);
}

40
src/main/java/org/apache/hadoop/hbase/regionserver/metrics/RegionServerMetrics.java
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@ -191,6 +191,12 @@ public class RegionServerMetrics implements Updater {
public final MetricsTimeVaryingRate fsWriteLatency =
new MetricsTimeVaryingRate("fsWriteLatency", registry);
/**
* size (in bytes) of data in HLog append calls
*/
public final MetricsTimeVaryingRate fsWriteSize =
new MetricsTimeVaryingRate("fsWriteSize", registry);
/**
* filesystem sync latency
*/
@ -299,19 +305,24 @@ public class RegionServerMetrics implements Updater {
// minMax.update(timePerOps);
// }
// Means you can't pass a numOps of zero or get a ArithmeticException / by zero.
int ops = (int)HFile.getReadOps();
// HLog metrics
addHLogMetric(HLog.getWriteTime(), this.fsWriteLatency);
addHLogMetric(HLog.getWriteSize(), this.fsWriteSize);
addHLogMetric(HLog.getSyncTime(), this.fsSyncLatency);
// HFile metrics
int ops = HFile.getReadOps();
if (ops != 0) this.fsReadLatency.inc(ops, HFile.getReadTimeMs());
ops = (int)HFile.getWriteOps();
if (ops != 0) this.fsWriteLatency.inc(ops, HFile.getWriteTimeMs());
// mix in HLog metrics
ops = (int)HLog.getWriteOps();
if (ops != 0) this.fsWriteLatency.inc(ops, HLog.getWriteTime());
ops = (int)HLog.getSyncOps();
if (ops != 0) this.fsSyncLatency.inc(ops, HLog.getSyncTime());
/* NOTE: removed HFile write latency. 2 reasons:
* 1) Mixing HLog latencies are far higher priority since they're
* on-demand and HFile is used in background (compact/flush)
* 2) HFile metrics are being handled at a higher level
* by compaction & flush metrics.
*/
// push the result
this.fsReadLatency.pushMetric(this.metricsRecord);
this.fsWriteLatency.pushMetric(this.metricsRecord);
this.fsWriteSize.pushMetric(this.metricsRecord);
this.fsSyncLatency.pushMetric(this.metricsRecord);
this.compactionTime.pushMetric(this.metricsRecord);
this.compactionSize.pushMetric(this.metricsRecord);
@ -321,10 +332,23 @@ public class RegionServerMetrics implements Updater {
this.metricsRecord.update();
}
private void addHLogMetric(HLog.Metric logMetric,
MetricsTimeVaryingRate hadoopMetric) {
if (logMetric.count > 0)
hadoopMetric.inc(logMetric.min);
if (logMetric.count > 1)
hadoopMetric.inc(logMetric.max);
if (logMetric.count > 2) {
int ops = logMetric.count - 2;
hadoopMetric.inc(ops, logMetric.total - logMetric.max - logMetric.min);
}
}
public void resetAllMinMax() {
this.atomicIncrementTime.resetMinMax();
this.fsReadLatency.resetMinMax();
this.fsWriteLatency.resetMinMax();
this.fsWriteSize.resetMinMax();
this.fsSyncLatency.resetMinMax();
}

73
src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java
View File

@ -262,32 +262,50 @@ public class HLog implements Syncable {
}
}
public static class Metric {
public long min = Long.MAX_VALUE;
public long max = 0;
public long total = 0;
public int count = 0;
synchronized void inc(final long val) {
min = Math.min(min, val);
max = Math.max(max, val);
total += val;
++count;
}
synchronized Metric get() {
Metric copy = new Metric();
copy.min = min;
copy.max = max;
copy.total = total;
copy.count = count;
this.min = Long.MAX_VALUE;
this.max = 0;
this.total = 0;
this.count = 0;
return copy;
}
}
// For measuring latency of writes
private static volatile long writeOps;
private static volatile long writeTime;
private static Metric writeTime = new Metric();
private static Metric writeSize = new Metric();
// For measuring latency of syncs
private static AtomicLong syncOps = new AtomicLong();
private static AtomicLong syncTime = new AtomicLong();
private static Metric syncTime = new Metric();
private static AtomicLong syncBatchSize = new AtomicLong();
public static long getWriteOps() {
long ret = writeOps;
writeOps = 0;
return ret;
public static Metric getWriteTime() {
return writeTime.get();
}
public static long getWriteTime() {
long ret = writeTime;
writeTime = 0;
return ret;
public static Metric getWriteSize() {
return writeSize.get();
}
public static long getSyncOps() {
return syncOps.getAndSet(0);
}
public static long getSyncTime() {
return syncTime.getAndSet(0);
public static Metric getSyncTime() {
return syncTime.get();
}
public static long getSyncBatchSize() {
@ -1247,8 +1265,7 @@ public class HLog implements Syncable {
}
// We try to not acquire the updateLock just to update statistics.
// Make these statistics as AtomicLong.
syncTime.addAndGet(System.currentTimeMillis() - now);
syncOps.incrementAndGet();
syncTime.inc(System.currentTimeMillis() - now);
if (!this.logRollRunning) {
checkLowReplication();
if (this.writer.getLength() > this.logrollsize) {
@ -1379,13 +1396,13 @@ public class HLog implements Syncable {
}
long took = System.currentTimeMillis() - now;
coprocessorHost.postWALWrite(info, logKey, logEdit);
writeTime += took;
writeOps++;
if (took > 1000) {
writeTime.inc(took);
long len = 0;
for(KeyValue kv : logEdit.getKeyValues()) {
for (KeyValue kv : logEdit.getKeyValues()) {
len += kv.getLength();
}
writeSize.inc(len);
if (took > 1000) {
LOG.warn(String.format(
"%s took %d ms appending an edit to hlog; editcount=%d, len~=%s",
Thread.currentThread().getName(), took, this.numEntries.get(),
@ -1504,8 +1521,12 @@ public class HLog implements Syncable {
System.currentTimeMillis(), HConstants.DEFAULT_CLUSTER_ID);
logSyncerThread.append(new Entry(key, edit));
txid = this.unflushedEntries.incrementAndGet();
writeTime += System.currentTimeMillis() - now;
writeOps++;
writeTime.inc(System.currentTimeMillis() - now);
long len = 0;
for (KeyValue kv : edit.getKeyValues()) {
len += kv.getLength();
}
writeSize.inc(len);
this.numEntries.incrementAndGet();
}
// sync txn to file system

14
src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
View File

@ -348,8 +348,8 @@ public class TestHRegion extends HBaseTestCase {
byte[] val = Bytes.toBytes("val");
initHRegion(b, getName(), cf);
HLog.getSyncOps(); // clear counter from prior tests
assertEquals(0, HLog.getSyncOps());
HLog.getSyncTime(); // clear counter from prior tests
assertEquals(0, HLog.getSyncTime().count);
LOG.info("First a batch put with all valid puts");
final Put[] puts = new Put[10];
@ -364,7 +364,7 @@ public class TestHRegion extends HBaseTestCase {
assertEquals(OperationStatusCode.SUCCESS, codes[i]
.getOperationStatusCode());
}
assertEquals(1, HLog.getSyncOps());
assertEquals(1, HLog.getSyncTime().count);
LOG.info("Next a batch put with one invalid family");
puts[5].add(Bytes.toBytes("BAD_CF"), qual, val);
@ -374,7 +374,7 @@ public class TestHRegion extends HBaseTestCase {
assertEquals((i == 5) ? OperationStatusCode.BAD_FAMILY :
OperationStatusCode.SUCCESS, codes[i].getOperationStatusCode());
}
assertEquals(1, HLog.getSyncOps());
assertEquals(1, HLog.getSyncTime().count);
LOG.info("Next a batch put that has to break into two batches to avoid a lock");
Integer lockedRow = region.obtainRowLock(Bytes.toBytes("row_2"));
@ -395,7 +395,7 @@ public class TestHRegion extends HBaseTestCase {
LOG.info("...waiting for put thread to sync first time");
long startWait = System.currentTimeMillis();
while (HLog.getSyncOps() == 0) {
while (HLog.getSyncTime().count == 0) {
Thread.sleep(100);
if (System.currentTimeMillis() - startWait > 10000) {
fail("Timed out waiting for thread to sync first minibatch");
@ -406,7 +406,7 @@ public class TestHRegion extends HBaseTestCase {
LOG.info("...joining on thread");
ctx.stop();
LOG.info("...checking that next batch was synced");
assertEquals(1, HLog.getSyncOps());
assertEquals(1, HLog.getSyncTime().count);
codes = retFromThread.get();
for (int i = 0; i < 10; i++) {
assertEquals((i == 5) ? OperationStatusCode.BAD_FAMILY :
@ -430,7 +430,7 @@ public class TestHRegion extends HBaseTestCase {
OperationStatusCode.SUCCESS, codes[i].getOperationStatusCode());
}
// Make sure we didn't do an extra batch
assertEquals(1, HLog.getSyncOps());
assertEquals(1, HLog.getSyncTime().count);
// Make sure we still hold lock
assertTrue(region.isRowLocked(lockedRow));