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HDFS-13181. DiskBalancer: Add an configuration for valid plan hours . Contributed by Bharat Viswanadham.

This commit is contained in:
Arpit Agarwal 2018-02-27 10:18:07 -08:00
parent b22eaa05a1
commit 7da0b78cf2
5 changed files with 162 additions and 14 deletions
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5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
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@ -1157,6 +1157,11 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
"dfs.disk.balancer.max.disk.errors";
public static final int DFS_DISK_BALANCER_MAX_DISK_ERRORS_DEFAULT = 5;
public static final String DFS_DISK_BALANCER_PLAN_VALID_INTERVAL =
"dfs.disk.balancer.plan.valid.interval";
public static final String DFS_DISK_BALANCER_PLAN_VALID_INTERVAL_DEFAULT =
"1d";
public static final String DFS_DISK_BALANCER_BLOCK_TOLERANCE =
"dfs.disk.balancer.block.tolerance.percent";

27
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancer.java
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@ -91,6 +91,8 @@ public class DiskBalancer {
private String planFile;
private DiskBalancerWorkStatus.Result currentResult;
private long bandwidth;
private long planValidityInterval;
private final Configuration config;
/**
* Constructs a Disk Balancer object. This object takes care of reading a
@ -102,6 +104,7 @@ public class DiskBalancer {
*/
public DiskBalancer(String dataNodeUUID,
Configuration conf, BlockMover blockMover) {
this.config = conf;
this.currentResult = Result.NO_PLAN;
this.blockMover = blockMover;
this.dataset = this.blockMover.getDataset();
@ -117,6 +120,10 @@ public class DiskBalancer {
this.bandwidth = conf.getInt(
DFSConfigKeys.DFS_DISK_BALANCER_MAX_DISK_THROUGHPUT,
DFSConfigKeys.DFS_DISK_BALANCER_MAX_DISK_THROUGHPUT_DEFAULT);
this.planValidityInterval = conf.getTimeDuration(
DFSConfigKeys.DFS_DISK_BALANCER_PLAN_VALID_INTERVAL,
DFSConfigKeys.DFS_DISK_BALANCER_PLAN_VALID_INTERVAL_DEFAULT,
TimeUnit.MILLISECONDS);
}
/**
@ -417,15 +424,17 @@ public class DiskBalancer {
long now = Time.now();
long planTime = plan.getTimeStamp();
// TODO : Support Valid Plan hours as a user configurable option.
if ((planTime +
(TimeUnit.HOURS.toMillis(
DiskBalancerConstants.DISKBALANCER_VALID_PLAN_HOURS))) < now) {
String hourString = "Plan was generated more than " +
Integer.toString(DiskBalancerConstants.DISKBALANCER_VALID_PLAN_HOURS)
+ " hours ago.";
LOG.error("Disk Balancer - " + hourString);
throw new DiskBalancerException(hourString,
if ((planTime + planValidityInterval) < now) {
String planValidity = config.get(
DFSConfigKeys.DFS_DISK_BALANCER_PLAN_VALID_INTERVAL,
DFSConfigKeys.DFS_DISK_BALANCER_PLAN_VALID_INTERVAL_DEFAULT);
if (planValidity.matches("[0-9]$")) {
planValidity += "ms";
}
String errorString = "Plan was generated more than " + planValidity
+ " ago";
LOG.error("Disk Balancer - " + errorString);
throw new DiskBalancerException(errorString,
DiskBalancerException.Result.OLD_PLAN_SUBMITTED);
}
}

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/DiskBalancerConstants.java
View File

@ -33,11 +33,6 @@ public final class DiskBalancerConstants {
public static final int DISKBALANCER_MIN_VERSION = 1;
public static final int DISKBALANCER_MAX_VERSION = 1;
/**
* We treat a plan as stale if it was generated before the hours
* defined by the constant below. Defaults to 24 hours.
*/
public static final int DISKBALANCER_VALID_PLAN_HOURS = 24;
// never constructed.
private DiskBalancerConstants() {
}

11
hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
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@ -4630,6 +4630,17 @@
</description>
</property>
<property>
<name>dfs.disk.balancer.plan.valid.interval</name>
<value>1d</value>
<description>
Maximum number of hours the disk balancer plan is valid.
This setting supports multiple time unit suffixes as described
in dfs.heartbeat.interval. If no suffix is specified then milliseconds
is assumed.
</description>
</property>
<property>
<name>dfs.disk.balancer.enabled</name>

128
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/diskbalancer/command/TestDiskBalancerCommand.java
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@ -18,6 +18,7 @@
package org.apache.hadoop.hdfs.server.diskbalancer.command;
import static java.lang.Thread.sleep;
import static org.apache.hadoop.hdfs.tools.DiskBalancerCLI.CANCEL;
import static org.apache.hadoop.hdfs.tools.DiskBalancerCLI.EXECUTE;
import static org.apache.hadoop.hdfs.tools.DiskBalancerCLI.HELP;
@ -58,6 +59,7 @@ import org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerDataNode
import org.apache.hadoop.hdfs.tools.DiskBalancerCLI;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.test.GenericTestUtils;
import org.apache.hadoop.test.LambdaTestUtils;
import org.apache.hadoop.test.PathUtils;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
@ -187,6 +189,132 @@ public class TestDiskBalancerCommand {
}
}
@Test(timeout = 600000)
public void testDiskBalancerExecuteOptionPlanValidityWithException() throws
Exception {
final int numDatanodes = 1;
final Configuration hdfsConf = new HdfsConfiguration();
hdfsConf.setBoolean(DFSConfigKeys.DFS_DISK_BALANCER_ENABLED, true);
hdfsConf.set(DFSConfigKeys.DFS_DISK_BALANCER_PLAN_VALID_INTERVAL, "0d");
/* new cluster with imbalanced capacity */
final MiniDFSCluster miniCluster = DiskBalancerTestUtil.
newImbalancedCluster(
hdfsConf,
numDatanodes,
CAPACITIES,
DEFAULT_BLOCK_SIZE,
FILE_LEN);
try {
/* get full path of plan */
final String planFileFullName = runAndVerifyPlan(miniCluster, hdfsConf);
/* run execute command */
final String cmdLine = String.format(
"hdfs diskbalancer -%s %s",
EXECUTE,
planFileFullName);
LambdaTestUtils.intercept(
RemoteException.class,
"DiskBalancerException",
"Plan was generated more than 0d ago",
() -> {
runCommand(cmdLine, hdfsConf, miniCluster);
});
} finally{
if (miniCluster != null) {
miniCluster.shutdown();
}
}
}
@Test(timeout = 600000)
public void testDiskBalancerExecutePlanValidityWithOutUnitException()
throws
Exception {
final int numDatanodes = 1;
final Configuration hdfsConf = new HdfsConfiguration();
hdfsConf.setBoolean(DFSConfigKeys.DFS_DISK_BALANCER_ENABLED, true);
hdfsConf.set(DFSConfigKeys.DFS_DISK_BALANCER_PLAN_VALID_INTERVAL, "0");
/* new cluster with imbalanced capacity */
final MiniDFSCluster miniCluster = DiskBalancerTestUtil.
newImbalancedCluster(
hdfsConf,
numDatanodes,
CAPACITIES,
DEFAULT_BLOCK_SIZE,
FILE_LEN);
try {
/* get full path of plan */
final String planFileFullName = runAndVerifyPlan(miniCluster, hdfsConf);
/* run execute command */
final String cmdLine = String.format(
"hdfs diskbalancer -%s %s",
EXECUTE,
planFileFullName);
LambdaTestUtils.intercept(
RemoteException.class,
"DiskBalancerException",
"Plan was generated more than 0ms ago",
() -> {
runCommand(cmdLine, hdfsConf, miniCluster);
});
} finally{
if (miniCluster != null) {
miniCluster.shutdown();
}
}
}
@Test(timeout = 600000)
public void testDiskBalancerExecuteOptionPlanValidity() throws Exception {
final int numDatanodes = 1;
final Configuration hdfsConf = new HdfsConfiguration();
hdfsConf.setBoolean(DFSConfigKeys.DFS_DISK_BALANCER_ENABLED, true);
hdfsConf.set(DFSConfigKeys.DFS_DISK_BALANCER_PLAN_VALID_INTERVAL, "600s");
/* new cluster with imbalanced capacity */
final MiniDFSCluster miniCluster = DiskBalancerTestUtil.
newImbalancedCluster(
hdfsConf,
numDatanodes,
CAPACITIES,
DEFAULT_BLOCK_SIZE,
FILE_LEN);
try {
/* get full path of plan */
final String planFileFullName = runAndVerifyPlan(miniCluster, hdfsConf);
/* run execute command */
final String cmdLine = String.format(
"hdfs diskbalancer -%s %s",
EXECUTE,
planFileFullName);
// Plan is valid for 600 seconds, sleeping for 10seconds, so now
// diskbalancer should execute the plan
sleep(10000);
runCommand(cmdLine, hdfsConf, miniCluster);
} finally{
if (miniCluster != null) {
miniCluster.shutdown();
}
}
}
private String runAndVerifyPlan(
final MiniDFSCluster miniCluster,
final Configuration hdfsConf) throws Exception {