Revert "HDFS-11477. Simplify file IO profiling configuration. Contributed by Hanisha Koneru."

This reverts commit e61491d476.
This commit is contained in:
Andrew Wang 2017-03-02 16:20:48 -08:00
parent e61491d476
commit 8f4817f2c5
6 changed files with 17 additions and 31 deletions

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@ -332,12 +332,7 @@ Each metrics record contains tags such as SessionId and Hostname as additional i
FsVolume
--------
Per-volume metrics contain Datanode Volume IO related statistics. Per-volume
metrics are off by default. They can be enabled by setting `dfs.datanode
.fileio.profiling.sampling.fraction` to a fraction between 0.0 and 1.0.
Setting this value to 0.0 would mean profiling is not enabled. But enabling
per-volume metrics may have a performance impact. Each metrics record
contains tags such as Hostname as additional information along with metrics.
Per-volume metrics contain Datanode Volume IO related statistics. Per-volume metrics are off by default. They can be enbabled by setting `dfs.datanode.enable.fileio.profiling` to **true**, but enabling per-volume metrics may have a performance impact. Each metrics record contains tags such as Hostname as additional information along with metrics.
| Name | Description |
|:---- |:---- |

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@ -718,6 +718,10 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
public static final long DFS_EDIT_LOG_TRANSFER_RATE_DEFAULT = 0; //no throttling
// Datanode File IO Stats
public static final String DFS_DATANODE_ENABLE_FILEIO_PROFILING_KEY =
"dfs.datanode.enable.fileio.profiling";
public static final boolean DFS_DATANODE_ENABLE_FILEIO_PROFILING_DEFAULT =
false;
public static final String DFS_DATANODE_ENABLE_FILEIO_FAULT_INJECTION_KEY =
"dfs.datanode.enable.fileio.fault.injection";
public static final boolean
@ -726,7 +730,7 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY =
"dfs.datanode.fileio.profiling.sampling.fraction";
public static final double
DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_DEFAULT = 0.0;
DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_DEAFULT = 1.0;
//Keys with no defaults
public static final String DFS_DATANODE_PLUGINS_KEY = "dfs.datanode.plugins";

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@ -62,7 +62,7 @@
*
* Behavior can be injected into these events by enabling the
* profiling and/or fault injection event hooks through
* {@link DFSConfigKeys#DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY} and
* {@link DFSConfigKeys#DFS_DATANODE_ENABLE_FILEIO_PROFILING_KEY} and
* {@link DFSConfigKeys#DFS_DATANODE_ENABLE_FILEIO_FAULT_INJECTION_KEY}.
* These event hooks are disabled by default.
*

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@ -18,7 +18,6 @@
package org.apache.hadoop.hdfs.server.datanode;
import static java.lang.Math.abs;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
@ -44,32 +43,18 @@ class ProfilingFileIoEvents {
public ProfilingFileIoEvents(@Nullable Configuration conf) {
if (conf != null) {
isEnabled = conf.getBoolean(DFSConfigKeys
.DFS_DATANODE_ENABLE_FILEIO_PROFILING_KEY, DFSConfigKeys
.DFS_DATANODE_ENABLE_FILEIO_PROFILING_DEFAULT);
double fileIOSamplingFraction = conf.getDouble(DFSConfigKeys
.DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY,
DFSConfigKeys
.DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_DEFAULT);
if (abs(fileIOSamplingFraction) < 0.000001) {
LOG.info(DFSConfigKeys
.DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY + " set to "
+ fileIOSamplingFraction + ". Disabling file IO profiling");
isEnabled = false;
} else if (fileIOSamplingFraction < 0.000001) {
.DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_DEAFULT);
if (fileIOSamplingFraction > 1) {
LOG.warn(DFSConfigKeys
.DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY +
" value cannot be less than 0. Disabling file IO profiling.");
isEnabled = false;
} else if (fileIOSamplingFraction > 1) {
LOG.warn(DFSConfigKeys
.DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY +
" value cannot be more than 1. Setting value to 1 and enabling " +
"file IO profiling");
isEnabled = true;
" value cannot be more than 1. Setting value to 1");
fileIOSamplingFraction = 1;
} else {
LOG.info(DFSConfigKeys
.DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY + " set to "
+ fileIOSamplingFraction + ". Enabling file IO profiling");
isEnabled = true;
}
sampleRangeMax = (int) (fileIOSamplingFraction * Integer.MAX_VALUE);
} else {

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@ -121,8 +121,8 @@ public void testVolumeMetricsWithVolumeDepartureArrival() throws Exception {
private MiniDFSCluster setupClusterForVolumeMetrics() throws IOException {
Configuration conf = new HdfsConfiguration();
conf.setDouble(DFSConfigKeys
.DFS_DATANODE_FILEIO_PROFILING_SAMPLING_FRACTION_KEY, 1.0);
conf.setBoolean(DFSConfigKeys
.DFS_DATANODE_ENABLE_FILEIO_PROFILING_KEY, true);
SimulatedFSDataset.setFactory(conf);
return new MiniDFSCluster.Builder(conf)
.numDataNodes(NUM_DATANODES)

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@ -103,6 +103,8 @@ public void initializeMemberVariables() {
.add(DFSConfigKeys.DFS_DATANODE_STARTUP_KEY);
configurationPropsToSkipCompare
.add(DFSConfigKeys.DFS_NAMENODE_STARTUP_KEY);
configurationPropsToSkipCompare
.add(DFSConfigKeys.DFS_DATANODE_ENABLE_FILEIO_PROFILING_KEY);
configurationPropsToSkipCompare.add(DFSConfigKeys
.DFS_DATANODE_ENABLE_FILEIO_FAULT_INJECTION_KEY);
configurationPropsToSkipCompare.add(DFSConfigKeys