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HDFS-12502. nntop should support a category based on FilesInGetListingOps.

This commit is contained in:
Zhe Zhang 2017-10-18 23:51:24 -07:00
parent b016f08f67
commit 60bfee270e
3 changed files with 36 additions and 10 deletions
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5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -3673,6 +3673,11 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
readUnlock(operationName);
}
logAuditEvent(true, operationName, src);
if (topConf.isEnabled && isAuditEnabled() && isExternalInvocation()
&& dl != null && Server.getRemoteUser() != null) {
topMetrics.reportFilesInGetListing(Server.getRemoteUser().toString(),
dl.getPartialListing().length);
}
return dl;
}

28
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/top/metrics/TopMetrics.java
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@ -70,6 +70,14 @@ public class TopMetrics implements MetricsSource {
public static final Logger LOG = LoggerFactory.getLogger(TopMetrics.class);
public static final String TOPMETRICS_METRICS_SOURCE_NAME =
"NNTopUserOpCounts";
/**
* In addition to counts of different RPC calls, NNTop also reports top
* users listing large directories (measured by the number of files involved
* in listing operations from the user). This is important because the CPU
* and GC overhead of a listing operation grows linearly with the number of
* files involved. This category in NNTop is {@link #FILES_IN_GETLISTING}.
*/
public static final String FILES_IN_GETLISTING = "filesInGetListing";
private final boolean isMetricsSourceEnabled;
private static void logConf(Configuration conf) {
@ -123,22 +131,30 @@ public class TopMetrics implements MetricsSource {
public void report(boolean succeeded, String userName, InetAddress addr,
String cmd, String src, String dst, FileStatus status) {
// currently nntop only makes use of the username and the command
report(userName, cmd);
report(userName, cmd, 1);
}
public void report(String userName, String cmd) {
public void reportFilesInGetListing(String userName, int numFiles) {
report(userName, FILES_IN_GETLISTING, numFiles);
}
public void report(String userName, String cmd, int delta) {
long currTime = Time.monotonicNow();
report(currTime, userName, cmd);
report(currTime, userName, cmd, delta);
}
public void report(long currTime, String userName, String cmd) {
public void report(long currTime, String userName, String cmd, int delta) {
LOG.debug("a metric is reported: cmd: {} user: {}", cmd, userName);
userName = UserGroupInformation.trimLoginMethod(userName);
for (RollingWindowManager rollingWindowManager : rollingWindowManagers
.values()) {
rollingWindowManager.recordMetric(currTime, cmd, userName, 1);
rollingWindowManager.recordMetric(currTime, cmd, userName, delta);
// Increase the number of all RPC calls by the user, unless the report
// is for the number of files in a listing operation.
if (!cmd.equals(FILES_IN_GETLISTING)) {
rollingWindowManager.recordMetric(currTime,
TopConf.ALL_CMDS, userName, 1);
TopConf.ALL_CMDS, userName, delta);
}
}
}

11
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/metrics/TestTopMetrics.java
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@ -26,6 +26,7 @@ import org.apache.hadoop.metrics2.lib.Interns;
import org.junit.Test;
import static org.apache.hadoop.hdfs.server.namenode.top.metrics.TopMetrics.TOPMETRICS_METRICS_SOURCE_NAME;
import static org.apache.hadoop.hdfs.server.namenode.top.metrics.TopMetrics.FILES_IN_GETLISTING;
import static org.apache.hadoop.test.MetricsAsserts.getMetrics;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
@ -41,9 +42,10 @@ public class TestTopMetrics {
TopMetrics topMetrics = new TopMetrics(conf,
topConf.nntopReportingPeriodsMs);
// Dummy command
topMetrics.report("test", "listStatus");
topMetrics.report("test", "listStatus");
topMetrics.report("test", "listStatus");
topMetrics.report("test", "listStatus", 1);
topMetrics.report("test", "listStatus", 1);
topMetrics.report("test", "listStatus", 1);
topMetrics.report("test", FILES_IN_GETLISTING, 1000);
MetricsRecordBuilder rb = getMetrics(topMetrics);
MetricsCollector mc = rb.parent();
@ -59,5 +61,8 @@ public class TestTopMetrics {
verify(rb, times(3)).addCounter(Interns.info("op=listStatus." +
"user=test.count", "Total operations performed by user"), 3L);
verify(rb, times(3)).addCounter(Interns.info("op=" + FILES_IN_GETLISTING +
".user=test.count", "Total operations performed by user"), 1000L);
}
}