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HDFS-12883. RBF: Document Router and State Store metrics. Contributed by Yiqun Lin. 

(cherry picked from commit 91c96bdf8e)
This commit is contained in:
Yiqun Lin 2017-12-14 16:00:53 +08:00
parent d69b7358b6
commit 22bc62058b
4 changed files with 45 additions and 3 deletions
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36
hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
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@ -397,6 +397,42 @@ contains tags such as Hostname as additional information along with metrics.
| `FileIoErrorRateNumOps` | The number of file io error operations within an interval time of metric |
| `FileIoErrorRateAvgTime` | It measures the mean time in milliseconds from the start of an operation to hitting a failure |
RouterRPCMetrics
----------------
RouterRPCMetrics shows the statistics of the Router component in Router-based federation.
| Name | Description |
|:---- |:---- |
| `ProcessingOp` | Number of operations the Router processed internally |
| `ProxyOp` | Number of operations the Router proxied to a Namenode |
| `ProxyOpFailureStandby` | Number of operations to fail to reach NN |
| `ProxyOpFailureCommunicate` | Number of operations to hit a standby NN |
| `ProxyOpNotImplemented` | Number of operations not implemented |
| `RouterFailureStateStore` | Number of failed requests due to State Store unavailable |
| `RouterFailureReadOnly` | Number of failed requests due to read only mount point |
| `RouterFailureLocked` | Number of failed requests due to locked path |
| `RouterFailureSafemode` | Number of failed requests due to safe mode |
| `ProcessingNumOps` | Number of operations the Router processed internally within an interval time of metric |
| `ProcessingAvgTime` | Average time for the Router to process operations in nanoseconds |
| `ProxyNumOps` | Number of times of that the Router to proxy operations to the Namenodes within an interval time of metric |
| `ProxyAvgTime` | Average time for the Router to proxy operations to the Namenodes in nanoseconds |
StateStoreMetrics
-----------------
StateStoreMetrics shows the statistics of the State Store component in Router-based federation.
| Name | Description |
|:---- |:---- |
| `ReadsNumOps` | Number of GET transactions for State Store within an interval time of metric |
| `ReadsAvgTime` | Average time of GET transactions for State Store in milliseconds |
| `WritesNumOps` | Number of PUT transactions for State Store within an interval time of metric |
| `WritesAvgTime` | Average time of PUT transactions for State Store in milliseconds |
| `RemovesNumOps` | Number of REMOVE transactions for State Store within an interval time of metric |
| `RemovesAvgTime` | Average time of REMOVE transactions for State Store in milliseconds |
| `FailuresNumOps` | Number of failed transactions for State Store within an interval time of metric |
| `FailuresAvgTime` | Average time of failed transactions for State Store in milliseconds |
| `Cache`*BaseRecord*`Size` | Number of store records to cache in State Store |
yarn context
============

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/federation/metrics/FederationRPCMetrics.java
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@ -34,7 +34,7 @@ import org.apache.hadoop.metrics2.lib.MutableRate;
* Implementation of the RPC metrics collector.
*/
@Metrics(name = "RouterRPCActivity", about = "Router RPC Activity",
context = "router")
context = "dfs")
public class FederationRPCMetrics implements FederationRPCMBean {
private final MetricsRegistry registry = new MetricsRegistry("router");

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/federation/metrics/StateStoreMetrics.java
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@ -38,7 +38,7 @@ import com.google.common.annotations.VisibleForTesting;
* Implementations of the JMX interface for the State Store metrics.
*/
@Metrics(name = "StateStoreActivity", about = "Router metrics",
context = "router")
context = "dfs")
public final class StateStoreMetrics implements StateStoreMBean {
private final MetricsRegistry registry = new MetricsRegistry("router");

8
hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSRouterFederation.md
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@ -312,4 +312,10 @@ Monitor the namenodes in the subclusters for forwarding the client requests.
| dfs.federation.router.heartbeat.enable | `true` | If `true`, the Router heartbeats into the State Store. |
| dfs.federation.router.heartbeat.interval | 5000 | How often the Router should heartbeat into the State Store in milliseconds. |
| dfs.federation.router.monitor.namenode | | The identifier of the namenodes to monitor and heartbeat. |
| dfs.federation.router.monitor.localnamenode.enable | `true` | If `true`, the Router should monitor the namenode in the local machine. |
| dfs.federation.router.monitor.localnamenode.enable | `true` | If `true`, the Router should monitor the namenode in the local machine. |
Metrics
-------
The Router and State Store statistics are exposed in metrics/JMX. These info will be very useful for monitoring.
More metrics info can see [Router RPC Metrics](../../hadoop-project-dist/hadoop-common/Metrics.html#RouterRPCMetrics) and [State Store Metrics](../../hadoop-project-dist/hadoop-common/Metrics.html#StateStoreMetrics).