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HDFS-7977. NFS couldn't take percentile intervals. Contributed by Brandon Li 

(cherry picked from commit 570a83ae80)
(cherry picked from commit 260dbe96c3)
This commit is contained in:
Brandon Li 2015-03-24 10:49:16 -07:00
parent cc5922607a
commit 14d1cccfad
4 changed files with 20 additions and 8 deletions
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1
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/conf/NfsConfigKeys.java
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@ -72,7 +72,6 @@ public class NfsConfigKeys {
public static final String NFS_HTTPS_ADDRESS_DEFAULT = "0.0.0.0:" + NFS_HTTPS_PORT_DEFAULT;
public static final String NFS_METRICS_PERCENTILES_INTERVALS_KEY = "nfs.metrics.percentiles.intervals";
public static final String NFS_METRICS_PERCENTILES_INTERVALS_DEFAULT = "";
/*
* HDFS super-user is the user with the same identity as NameNode process

13
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/Nfs3Metrics.java
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@ -90,9 +90,9 @@ public class Nfs3Metrics {
readNanosQuantiles[i] = registry.newQuantiles("readProcessNanos"
+ interval + "s", "Read process in ns", "ops", "latency", interval);
writeNanosQuantiles[i] = registry.newQuantiles("writeProcessNanos"
+ interval + "s", " process in ns", "ops", "latency", interval);
+ interval + "s", "Write process in ns", "ops", "latency", interval);
commitNanosQuantiles[i] = registry.newQuantiles("commitProcessNanos"
+ interval + "s", "Read process in ns", "ops", "latency", interval);
+ interval + "s", "Commit process in ns", "ops", "latency", interval);
}
}
@ -101,10 +101,9 @@ public class Nfs3Metrics {
MetricsSystem ms = DefaultMetricsSystem.instance();
JvmMetrics jm = JvmMetrics.create(gatewayName, sessionId, ms);
// Percentile measurement is [,,,] by default
int[] intervals = conf.getInts(conf.get(
NfsConfigKeys.NFS_METRICS_PERCENTILES_INTERVALS_KEY,
NfsConfigKeys.NFS_METRICS_PERCENTILES_INTERVALS_DEFAULT));
// Percentile measurement is [50th,75th,90th,95th,99th] currently
int[] intervals = conf
.getInts(NfsConfigKeys.NFS_METRICS_PERCENTILES_INTERVALS_KEY);
return ms.register(new Nfs3Metrics(gatewayName, sessionId, intervals, jm));
}
@ -217,4 +216,4 @@ public class Nfs3Metrics {
}
}
}
}

2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -927,6 +927,8 @@ Release 2.7.0 - UNRELEASED
HDFS-7961. Trigger full block report after hot swapping disk. (Eddy Xu via wang)
HDFS-7977. NFS couldn't take percentile intervals (brandonli)
BREAKDOWN OF HDFS-7584 SUBTASKS AND RELATED JIRAS
HDFS-7720. Quota by Storage Type API, tools and ClientNameNode

12
hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HdfsNfsGateway.md
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@ -170,6 +170,18 @@ It's strongly recommended for the users to update a few configuration properties
<value>the_name_of_hdfs_superuser</value>
</property>
* Metrics. Like other HDFS daemons, the gateway exposes runtime metrics. It is available at `http://gateway-ip:50079/jmx` as a JSON document.
The NFS handler related metrics is exposed under the name "Nfs3Metrics". The latency histograms can be enabled by adding the following
property to hdfs-site.xml file.
<property>
<name>nfs.metrics.percentiles.intervals</name>
<value>100</value>
<description>Enable the latency histograms for read, write and
commit requests. The time unit is 100 seconds in this example.
</description>
</property>
* JVM and log settings. You can export JVM settings (e.g., heap size and GC log) in
HADOOP\_NFS3\_OPTS. More NFS related settings can be found in hadoop-env.sh.
To get NFS debug trace, you can edit the log4j.property file