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HDFS-2493. Remove reference to FSNamesystem in blockmanagement classes.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1190491 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tsz-wo Sze 2011-10-28 18:28:26 +00:00
parent cbdb07f4ca
commit 9692cfc9ae
9 changed files with 96 additions and 38 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -825,6 +825,9 @@ Release 0.23.0 - Unreleased
HDFS-2507. Allow saveNamespace operations to be canceled. (todd)
HDFS-2493. Remove reference to FSNamesystem in blockmanagement classes.
(szetszwo)
OPTIMIZATIONS
HDFS-1458. Improve checkpoint performance by avoiding unnecessary image

15
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
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@ -53,7 +53,7 @@
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.ReplicaState;
import org.apache.hadoop.hdfs.server.common.Util;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.namenode.FSClusterStats;
import org.apache.hadoop.hdfs.server.namenode.INode;
import org.apache.hadoop.hdfs.server.namenode.INodeFile;
import org.apache.hadoop.hdfs.server.namenode.INodeFileUnderConstruction;
@ -72,8 +72,6 @@
/**
* Keeps information related to the blocks stored in the Hadoop cluster.
* This class is a helper class for {@link FSNamesystem} and requires several
* methods to be called with lock held on {@link FSNamesystem}.
*/
@InterfaceAudience.Private
public class BlockManager {
@ -176,15 +174,16 @@ public long getExcessBlocksCount() {
/** for block replicas placement */
private BlockPlacementPolicy blockplacement;
public BlockManager(FSNamesystem fsn, Configuration conf) throws IOException {
namesystem = fsn;
datanodeManager = new DatanodeManager(this, fsn, conf);
public BlockManager(final Namesystem namesystem, final FSClusterStats stats,
final Configuration conf) throws IOException {
this.namesystem = namesystem;
datanodeManager = new DatanodeManager(this, namesystem, conf);
heartbeatManager = datanodeManager.getHeartbeatManager();
invalidateBlocks = new InvalidateBlocks(datanodeManager);
blocksMap = new BlocksMap(DEFAULT_MAP_LOAD_FACTOR);
blockplacement = BlockPlacementPolicy.getInstance(
conf, fsn, datanodeManager.getNetworkTopology());
conf, stats, datanodeManager.getNetworkTopology());
pendingReplications = new PendingReplicationBlocks(conf.getInt(
DFSConfigKeys.DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_KEY,
DFSConfigKeys.DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_DEFAULT) * 1000L);
@ -2580,7 +2579,7 @@ int computeDatanodeWork() throws IOException {
workFound = this.computeReplicationWork(blocksToProcess);
// Update FSNamesystemMetrics counters
// Update counters
namesystem.writeLock();
try {
this.updateState();

11
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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@ -50,8 +50,8 @@
import org.apache.hadoop.hdfs.protocol.UnregisteredNodeException;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor.BlockTargetPair;
import org.apache.hadoop.hdfs.server.common.Util;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
import org.apache.hadoop.hdfs.server.protocol.BalancerBandwidthCommand;
import org.apache.hadoop.hdfs.server.protocol.BlockCommand;
import org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand;
@ -79,7 +79,7 @@
public class DatanodeManager {
static final Log LOG = LogFactory.getLog(DatanodeManager.class);
private final FSNamesystem namesystem;
private final Namesystem namesystem;
private final BlockManager blockManager;
private final HeartbeatManager heartbeatManager;
@ -125,12 +125,12 @@ public class DatanodeManager {
final int blockInvalidateLimit;
DatanodeManager(final BlockManager blockManager,
final FSNamesystem namesystem, final Configuration conf
final Namesystem namesystem, final Configuration conf
) throws IOException {
this.namesystem = namesystem;
this.blockManager = blockManager;
this.heartbeatManager = new HeartbeatManager(namesystem, conf);
this.heartbeatManager = new HeartbeatManager(namesystem, blockManager, conf);
this.hostsReader = new HostsFileReader(
conf.get(DFSConfigKeys.DFS_HOSTS, ""),
@ -164,7 +164,8 @@ public class DatanodeManager {
private Daemon decommissionthread = null;
void activate(final Configuration conf) {
this.decommissionthread = new Daemon(new DecommissionManager(namesystem).new Monitor(
final DecommissionManager dm = new DecommissionManager(namesystem, blockManager);
this.decommissionthread = new Daemon(dm.new Monitor(
conf.getInt(DFSConfigKeys.DFS_NAMENODE_DECOMMISSION_INTERVAL_KEY,
DFSConfigKeys.DFS_NAMENODE_DECOMMISSION_INTERVAL_DEFAULT),
conf.getInt(DFSConfigKeys.DFS_NAMENODE_DECOMMISSION_NODES_PER_INTERVAL_KEY,

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeStatistics.java
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@ -56,4 +56,7 @@ public interface DatanodeStatistics {
* The block related entries are set to -1.
*/
public long[] getStats();
/** @return the expired heartbeats */
public int getExpiredHeartbeats();
}

19
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DecommissionManager.java
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@ -23,7 +23,7 @@
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
/**
* Manage node decommissioning.
@ -33,10 +33,13 @@
class DecommissionManager {
static final Log LOG = LogFactory.getLog(DecommissionManager.class);
private final FSNamesystem fsnamesystem;
private final Namesystem namesystem;
private final BlockManager blockmanager;
DecommissionManager(final FSNamesystem namesystem) {
this.fsnamesystem = namesystem;
DecommissionManager(final Namesystem namesystem,
final BlockManager blockmanager) {
this.namesystem = namesystem;
this.blockmanager = blockmanager;
}
/** Periodically check decommission status. */
@ -61,12 +64,12 @@ class Monitor implements Runnable {
*/
@Override
public void run() {
for(; fsnamesystem.isRunning(); ) {
fsnamesystem.writeLock();
for(; namesystem.isRunning(); ) {
namesystem.writeLock();
try {
check();
} finally {
fsnamesystem.writeUnlock();
namesystem.writeUnlock();
}
try {
@ -78,7 +81,7 @@ public void run() {
}
private void check() {
final DatanodeManager dm = fsnamesystem.getBlockManager().getDatanodeManager();
final DatanodeManager dm = blockmanager.getDatanodeManager();
int count = 0;
for(Map.Entry<String, DatanodeDescriptor> entry
: dm.getDatanodeCyclicIteration(firstkey)) {

28
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/HeartbeatManager.java
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@ -27,7 +27,7 @@
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.protocol.DatanodeID;
import org.apache.hadoop.hdfs.server.common.Util;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
import org.apache.hadoop.util.Daemon;
/**
@ -55,14 +55,17 @@ class HeartbeatManager implements DatanodeStatistics {
/** Heartbeat monitor thread */
private final Daemon heartbeatThread = new Daemon(new Monitor());
final FSNamesystem namesystem;
final Namesystem namesystem;
final BlockManager blockManager;
HeartbeatManager(final FSNamesystem namesystem, final Configuration conf) {
HeartbeatManager(final Namesystem namesystem, final BlockManager blockManager,
final Configuration conf) {
this.heartbeatRecheckInterval = conf.getInt(
DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY,
DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_DEFAULT); // 5 minutes
this.namesystem = namesystem;
this.blockManager = blockManager;
}
void activate(Configuration conf) {
@ -136,6 +139,11 @@ public synchronized long[] getStats() {
getBlockPoolUsed()};
}
@Override
public synchronized int getExpiredHeartbeats() {
return stats.expiredHeartbeats;
}
synchronized void register(final DatanodeDescriptor d) {
if (!datanodes.contains(d)) {
addDatanode(d);
@ -191,7 +199,7 @@ synchronized void stopDecommission(final DatanodeDescriptor node) {
* effect causes more datanodes to be declared dead.
*/
void heartbeatCheck() {
final DatanodeManager dm = namesystem.getBlockManager().getDatanodeManager();
final DatanodeManager dm = blockManager.getDatanodeManager();
// It's OK to check safe mode w/o taking the lock here, we re-check
// for safe mode after taking the lock before removing a datanode.
if (namesystem.isInSafeMode()) {
@ -204,7 +212,7 @@ void heartbeatCheck() {
synchronized(this) {
for (DatanodeDescriptor d : datanodes) {
if (dm.isDatanodeDead(d)) {
namesystem.incrExpiredHeartbeats();
stats.incrExpiredHeartbeats();
dead = d;
break;
}
@ -244,8 +252,7 @@ public void run() {
heartbeatCheck();
lastHeartbeatCheck = now;
}
if (namesystem.getBlockManager().shouldUpdateBlockKey(
now - lastBlockKeyUpdate)) {
if (blockManager.shouldUpdateBlockKey(now - lastBlockKeyUpdate)) {
synchronized(HeartbeatManager.this) {
for(DatanodeDescriptor d : datanodes) {
d.needKeyUpdate = true;
@ -274,6 +281,8 @@ private static class Stats {
private long blockPoolUsed = 0L;
private int xceiverCount = 0;
private int expiredHeartbeats = 0;
private void add(final DatanodeDescriptor node) {
capacityUsed += node.getDfsUsed();
blockPoolUsed += node.getBlockPoolUsed();
@ -297,5 +306,10 @@ private void subtract(final DatanodeDescriptor node) {
capacityTotal -= node.getDfsUsed();
}
}
/** Increment expired heartbeat counter. */
private void incrExpiredHeartbeats() {
expiredHeartbeats++;
}
}
}

51
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -17,6 +17,45 @@
*/
package org.apache.hadoop.hdfs.server.namenode;
import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_DEFAULT;
import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_SIZE_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_SIZE_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_ACCESSTIME_PRECISION_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_DELEGATION_KEY_UPDATE_INTERVAL_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_DELEGATION_KEY_UPDATE_INTERVAL_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_DELEGATION_TOKEN_MAX_LIFETIME_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_DELEGATION_TOKEN_MAX_LIFETIME_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_DELEGATION_TOKEN_RENEW_INTERVAL_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_DELEGATION_TOKEN_RENEW_INTERVAL_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_MAX_OBJECTS_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_MAX_OBJECTS_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_REPLICATION_MIN_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_REPLICATION_MIN_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_REPL_QUEUE_THRESHOLD_PCT_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_SAFEMODE_EXTENSION_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_SAFEMODE_MIN_DATANODES_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_SAFEMODE_MIN_DATANODES_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_UPGRADE_PERMISSION_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_UPGRADE_PERMISSION_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_PERMISSIONS_ENABLED_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_PERMISSIONS_ENABLED_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_PERMISSIONS_SUPERUSERGROUP_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_PERMISSIONS_SUPERUSERGROUP_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_REPLICATION_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_REPLICATION_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_SUPPORT_APPEND_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_SUPPORT_APPEND_KEY;
import static org.apache.hadoop.hdfs.server.common.Util.now;
import java.io.BufferedWriter;
@ -68,7 +107,6 @@
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import static org.apache.hadoop.hdfs.DFSConfigKeys.*;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException;
@ -119,7 +157,6 @@
import org.apache.hadoop.metrics2.annotation.Metric;
import org.apache.hadoop.metrics2.annotation.Metrics;
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
import org.apache.hadoop.metrics2.lib.MutableCounterInt;
import org.apache.hadoop.metrics2.util.MBeans;
import org.apache.hadoop.net.NetworkTopology;
import org.apache.hadoop.net.Node;
@ -204,8 +241,6 @@ private static final void logAuditEvent(UserGroupInformation ugi,
private UserGroupInformation fsOwner;
private String supergroup;
private PermissionStatus defaultPermission;
// FSNamesystemMetrics counter variables
@Metric private MutableCounterInt expiredHeartbeats;
// Scan interval is not configurable.
private static final long DELEGATION_TOKEN_REMOVER_SCAN_INTERVAL =
@ -313,7 +348,7 @@ private void initialize(Configuration conf, FSImage fsImage)
DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_KEY,
DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_DEFAULT);
this.systemStart = now();
this.blockManager = new BlockManager(this, conf);
this.blockManager = new BlockManager(this, this, conf);
this.datanodeStatistics = blockManager.getDatanodeManager().getDatanodeStatistics();
this.fsLock = new ReentrantReadWriteLock(true); // fair locking
setConfigurationParameters(conf);
@ -2618,9 +2653,9 @@ public long getMissingBlocksCount() {
return blockManager.getMissingBlocksCount();
}
/** Increment expired heartbeat counter. */
public void incrExpiredHeartbeats() {
expiredHeartbeats.incr();
@Metric({"ExpiredHeartbeats", "Number of expired heartbeats"})
public int getExpiredHeartbeats() {
return datanodeStatistics.getExpiredHeartbeats();
}
/** @see ClientProtocol#getStats() */

2
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDatanodeReport.java
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@ -77,7 +77,7 @@ public void testDatanodeReport() throws Exception {
NUM_OF_DATANODES);
Thread.sleep(5000);
assertCounter("ExpiredHeartbeats", 1, getMetrics("FSNamesystem"));
assertGauge("ExpiredHeartbeats", 1, getMetrics("FSNamesystem"));
}finally {
cluster.shutdown();
}

2
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
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@ -80,7 +80,7 @@ public void setupMockCluster() throws IOException {
"need to set a dummy value here so it assumes a multi-rack cluster");
fsn = Mockito.mock(FSNamesystem.class);
Mockito.doReturn(true).when(fsn).hasWriteLock();
bm = new BlockManager(fsn, conf);
bm = new BlockManager(fsn, fsn, conf);
}
private void addNodes(Iterable<DatanodeDescriptor> nodesToAdd) {