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HDFS-16287. Support to make dfs.namenode.avoid.read.slow.datanode reconfigurable (#3596) 

(cherry picked from commit db89a9411e)
This commit is contained in:
huhaiyang 2021-11-12 10:07:34 +08:00 committed by Akira Ajisaka
parent 34c415ca2e
commit bcbe4fbfa7
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4 changed files with 61 additions and 12 deletions
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21
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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@ -18,8 +18,6 @@
package org.apache.hadoop.hdfs.server.blockmanagement;
import static org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.DNA_ERASURE_CODING_RECONSTRUCTION;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_DEFAULT;
import static org.apache.hadoop.util.Time.monotonicNow;
import org.apache.hadoop.thirdparty.com.google.common.collect.Sets;
@ -141,7 +139,7 @@ public class DatanodeManager {
private final boolean avoidStaleDataNodesForRead;
/** Whether or not to avoid using slow DataNodes for reading. */
private final boolean avoidSlowDataNodesForRead;
private volatile boolean avoidSlowDataNodesForRead;
/** Whether or not to consider lad for reading. */
private final boolean readConsiderLoad;
@ -217,7 +215,6 @@ public class DatanodeManager {
private Daemon slowPeerCollectorDaemon;
private final long slowPeerCollectionInterval;
private final int maxSlowPeerReportNodes;
private boolean excludeSlowNodesEnabled;
@Nullable
private final SlowDiskTracker slowDiskTracker;
@ -260,9 +257,6 @@ public class DatanodeManager {
final Timer timer = new Timer();
this.slowPeerTracker = dataNodePeerStatsEnabled ?
new SlowPeerTracker(conf, timer) : null;
this.excludeSlowNodesEnabled = conf.getBoolean(
DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_KEY,
DFS_NAMENODE_BLOCKPLACEMENTPOLICY_EXCLUDE_SLOW_NODES_ENABLED_DEFAULT);
this.maxSlowPeerReportNodes = conf.getInt(
DFSConfigKeys.DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_KEY,
DFSConfigKeys.DFS_NAMENODE_MAX_SLOWPEER_COLLECT_NODES_DEFAULT);
@ -270,7 +264,7 @@ public class DatanodeManager {
DFSConfigKeys.DFS_NAMENODE_SLOWPEER_COLLECT_INTERVAL_KEY,
DFSConfigKeys.DFS_NAMENODE_SLOWPEER_COLLECT_INTERVAL_DEFAULT,
TimeUnit.MILLISECONDS);
if (slowPeerTracker != null && excludeSlowNodesEnabled) {
if (slowPeerTracker != null) {
startSlowPeerCollector();
}
this.slowDiskTracker = dataNodeDiskStatsEnabled ?
@ -511,7 +505,16 @@ public class DatanodeManager {
private boolean isSlowNode(String dnUuid) {
return avoidSlowDataNodesForRead && slowNodesUuidSet.contains(dnUuid);
}
public void setAvoidSlowDataNodesForReadEnabled(boolean enable) {
this.avoidSlowDataNodesForRead = enable;
}
@VisibleForTesting
public boolean getEnableAvoidSlowDataNodesForRead() {
return this.avoidSlowDataNodesForRead;
}
/**
* Sort the non-striped located blocks by the distance to the target host.
*

28
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java
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@ -186,6 +186,8 @@ import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_GC_TIME_MONITOR_
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_GC_TIME_MONITOR_ENABLE_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_REPLICATOR_CLASSNAME_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_PLACEMENT_EC_CLASSNAME_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_DEFAULT;
import static org.apache.hadoop.util.ExitUtil.terminate;
import static org.apache.hadoop.util.ToolRunner.confirmPrompt;
@ -327,7 +329,8 @@ public class NameNode extends ReconfigurableBase implements
DFS_NAMENODE_REPLICATION_WORK_MULTIPLIER_PER_ITERATION,
DFS_BLOCK_REPLICATOR_CLASSNAME_KEY,
DFS_BLOCK_PLACEMENT_EC_CLASSNAME_KEY,
DFS_IMAGE_PARALLEL_LOAD_KEY));
DFS_IMAGE_PARALLEL_LOAD_KEY,
DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY));
private static final String USAGE = "Usage: hdfs namenode ["
+ StartupOption.BACKUP.getName() + "] | \n\t["
@ -2193,6 +2196,8 @@ public class NameNode extends ReconfigurableBase implements
return newVal;
} else if (property.equals(DFS_IMAGE_PARALLEL_LOAD_KEY)) {
return reconfigureParallelLoad(newVal);
} else if (property.equals(DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY)) {
return reconfigureSlowNodesParameters(datanodeManager, property, newVal);
} else {
throw new ReconfigurationException(property, newVal, getConf().get(
property));
@ -2379,6 +2384,27 @@ public class NameNode extends ReconfigurableBase implements
return Boolean.toString(enableParallelLoad);
}
String reconfigureSlowNodesParameters(final DatanodeManager datanodeManager,
final String property, final String newVal) throws ReconfigurationException {
namesystem.writeLock();
boolean enable;
try {
if (newVal == null) {
enable = DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_DEFAULT;
} else {
enable = Boolean.parseBoolean(newVal);
}
datanodeManager.setAvoidSlowDataNodesForReadEnabled(enable);
LOG.info("RECONFIGURE* changed {} to {}", property, newVal);
return Boolean.toString(enable);
} catch (IllegalArgumentException e) {
throw new ReconfigurationException(property, newVal, getConf().get(
property), e);
} finally {
namesystem.writeUnlock();
}
}
@Override // ReconfigurableBase
protected Configuration getNewConf() {
return new HdfsConfiguration();

18
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeReconfigure.java
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@ -51,6 +51,7 @@ import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHEC
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_STORAGE_POLICY_SATISFIER_MODE_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_STORAGE_POLICY_SATISFIER_MODE_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_INVALIDATE_LIMIT_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY;
import static org.apache.hadoop.fs.CommonConfigurationKeys.IPC_BACKOFF_ENABLE_DEFAULT;
public class TestNameNodeReconfigure {
@ -394,6 +395,23 @@ public class TestNameNodeReconfigure {
assertEquals(true, FSImageFormatProtobuf.getEnableParallelLoad());
}
@Test
public void testEnableSlowNodesParametersAfterReconfigured()
throws ReconfigurationException {
final NameNode nameNode = cluster.getNameNode();
final DatanodeManager datanodeManager = nameNode.namesystem
.getBlockManager().getDatanodeManager();
// By default, avoidSlowDataNodesForRead is false.
assertEquals(false, datanodeManager.getEnableAvoidSlowDataNodesForRead());
nameNode.reconfigureProperty(
DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY, Boolean.toString(true));
// After reconfigured, avoidSlowDataNodesForRead is true.
assertEquals(true, datanodeManager.getEnableAvoidSlowDataNodesForRead());
}
@After
public void shutDown() throws IOException {
if (cluster != null) {

6
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/TestDFSAdmin.java
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@ -25,6 +25,7 @@ import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_IMAGE_PARALLEL_LOAD_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_PLACEMENT_EC_CLASSNAME_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_REPLICATOR_CLASSNAME_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY;
import java.util.function.Supplier;
import org.apache.hadoop.thirdparty.com.google.common.collect.Lists;
@ -422,12 +423,13 @@ public class TestDFSAdmin {
final List<String> outs = Lists.newArrayList();
final List<String> errs = Lists.newArrayList();
getReconfigurableProperties("namenode", address, outs, errs);
assertEquals(13, outs.size());
assertEquals(14, outs.size());
assertEquals(DFS_BLOCK_PLACEMENT_EC_CLASSNAME_KEY, outs.get(1));
assertEquals(DFS_BLOCK_REPLICATOR_CLASSNAME_KEY, outs.get(2));
assertEquals(DFS_HEARTBEAT_INTERVAL_KEY, outs.get(3));
assertEquals(DFS_IMAGE_PARALLEL_LOAD_KEY, outs.get(4));
assertEquals(DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY, outs.get(5));
assertEquals(DFS_NAMENODE_AVOID_SLOW_DATANODE_FOR_READ_KEY, outs.get(5));
assertEquals(DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY, outs.get(6));
assertEquals(errs.size(), 0);
}