HDFS-8578. On upgrade, Datanode should process all storage/data dirs in parallel. Contributed by vinayakumarb and szetszwo
This commit is contained in:
Tsz-Wo Nicholas Sze
parent
56b7f2c2c1
commit
9b10373b2b
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@ -1910,6 +1910,9 @@ Release 2.7.3 - UNRELEASED
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HDFS-4946. Allow preferLocalNode in BlockPlacementPolicyDefault to be
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configurable (James Kinley and Nathan Roberts via kihwal)
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HDFS-8578. On upgrade, Datanode should process all storage/data dirs in
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parallel. (vinayakumarb and szetszwo via szetszwo)
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OPTIMIZATIONS
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BUG FIXES
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@ -807,6 +807,10 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
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"dfs.datanode.slow.io.warning.threshold.ms";
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public static final long DFS_DATANODE_SLOW_IO_WARNING_THRESHOLD_DEFAULT = 300;
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// Number of parallel threads to load multiple datanode volumes
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public static final String DFS_DATANODE_PARALLEL_VOLUME_LOAD_THREADS_NUM_KEY =
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"dfs.datanode.parallel.volumes.load.threads.num";
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public static final String DFS_NAMENODE_INOTIFY_MAX_EVENTS_PER_RPC_KEY =
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"dfs.namenode.inotify.max.events.per.rpc";
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public static final int DFS_NAMENODE_INOTIFY_MAX_EVENTS_PER_RPC_DEFAULT =
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@ -27,6 +27,7 @@
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import java.util.List;
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import java.util.Properties;
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import java.util.Set;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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@ -145,7 +146,8 @@ public void addStorageDir(StorageDirectory sd) {
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* @throws IOException
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*/
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private StorageDirectory loadStorageDirectory(NamespaceInfo nsInfo,
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File dataDir, StartupOption startOpt, Configuration conf)
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File dataDir, StartupOption startOpt,
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List<Callable<StorageDirectory>> callables, Configuration conf)
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throws IOException {
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StorageDirectory sd = new StorageDirectory(dataDir, null, true);
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try {
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@ -172,19 +174,17 @@ private StorageDirectory loadStorageDirectory(NamespaceInfo nsInfo,
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// Each storage directory is treated individually.
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// During startup some of them can upgrade or roll back
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// while others could be up-to-date for the regular startup.
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if (doTransition(sd, nsInfo, startOpt, conf)) {
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return sd;
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}
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if (!doTransition(sd, nsInfo, startOpt, callables, conf)) {
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if (getCTime() != nsInfo.getCTime()) {
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throw new IOException("Datanode CTime (=" + getCTime()
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+ ") is not equal to namenode CTime (=" + nsInfo.getCTime() + ")");
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// 3. Check CTime and update successfully loaded storage.
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if (getCTime() != nsInfo.getCTime()) {
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throw new IOException("Datanode CTime (=" + getCTime()
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+ ") is not equal to namenode CTime (=" + nsInfo.getCTime() + ")");
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}
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setServiceLayoutVersion(getServiceLayoutVersion());
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writeProperties(sd);
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}
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// 3. Update successfully loaded storage.
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setServiceLayoutVersion(getServiceLayoutVersion());
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writeProperties(sd);
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return sd;
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} catch (IOException ioe) {
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sd.unlock();
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@ -208,7 +208,8 @@ private StorageDirectory loadStorageDirectory(NamespaceInfo nsInfo,
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*/
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List<StorageDirectory> loadBpStorageDirectories(NamespaceInfo nsInfo,
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Collection<File> dataDirs, StartupOption startOpt,
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Configuration conf) throws IOException {
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List<Callable<StorageDirectory>> callables, Configuration conf)
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throws IOException {
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List<StorageDirectory> succeedDirs = Lists.newArrayList();
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try {
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for (File dataDir : dataDirs) {
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@ -218,7 +219,7 @@ List<StorageDirectory> loadBpStorageDirectories(NamespaceInfo nsInfo,
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"attempt to load an used block storage: " + dataDir);
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}
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final StorageDirectory sd = loadStorageDirectory(
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nsInfo, dataDir, startOpt, conf);
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nsInfo, dataDir, startOpt, callables, conf);
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succeedDirs.add(sd);
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}
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} catch (IOException e) {
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@ -242,11 +243,12 @@ List<StorageDirectory> loadBpStorageDirectories(NamespaceInfo nsInfo,
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* @throws IOException on error
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*/
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List<StorageDirectory> recoverTransitionRead(NamespaceInfo nsInfo,
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Collection<File> dataDirs, StartupOption startOpt, Configuration conf)
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Collection<File> dataDirs, StartupOption startOpt,
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List<Callable<StorageDirectory>> callables, Configuration conf)
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throws IOException {
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LOG.info("Analyzing storage directories for bpid " + nsInfo.getBlockPoolID());
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final List<StorageDirectory> loaded = loadBpStorageDirectories(
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nsInfo, dataDirs, startOpt, conf);
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nsInfo, dataDirs, startOpt, callables, conf);
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for (StorageDirectory sd : loaded) {
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addStorageDir(sd);
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}
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@ -353,7 +355,8 @@ protected void setFieldsFromProperties(Properties props, StorageDirectory sd)
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* @return true if the new properties has been written.
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*/
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private boolean doTransition(StorageDirectory sd, NamespaceInfo nsInfo,
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StartupOption startOpt, Configuration conf) throws IOException {
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StartupOption startOpt, List<Callable<StorageDirectory>> callables,
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Configuration conf) throws IOException {
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if (startOpt == StartupOption.ROLLBACK && sd.getPreviousDir().exists()) {
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Preconditions.checkState(!getTrashRootDir(sd).exists(),
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sd.getPreviousDir() + " and " + getTrashRootDir(sd) + " should not " +
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@ -395,7 +398,7 @@ private boolean doTransition(StorageDirectory sd, NamespaceInfo nsInfo,
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}
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if (this.layoutVersion > HdfsServerConstants.DATANODE_LAYOUT_VERSION
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|| this.cTime < nsInfo.getCTime()) {
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doUpgrade(sd, nsInfo, conf); // upgrade
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doUpgrade(sd, nsInfo, callables, conf); // upgrade
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return true;
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}
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// layoutVersion == LAYOUT_VERSION && this.cTime > nsInfo.cTime
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@ -425,7 +428,9 @@ private boolean doTransition(StorageDirectory sd, NamespaceInfo nsInfo,
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* @throws IOException on error
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*/
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private void doUpgrade(final StorageDirectory bpSd,
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final NamespaceInfo nsInfo, final Configuration conf) throws IOException {
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final NamespaceInfo nsInfo,
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final List<Callable<StorageDirectory>> callables,
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final Configuration conf) throws IOException {
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// Upgrading is applicable only to release with federation or after
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if (!DataNodeLayoutVersion.supports(
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LayoutVersion.Feature.FEDERATION, layoutVersion)) {
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@ -463,10 +468,21 @@ private void doUpgrade(final StorageDirectory bpSd,
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rename(bpCurDir, bpTmpDir);
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final String name = "block pool " + blockpoolID + " at " + bpSd.getRoot();
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doUgrade(name, bpSd, nsInfo, bpPrevDir, bpTmpDir, bpCurDir, oldLV, conf);
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if (callables == null) {
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doUpgrade(name, bpSd, nsInfo, bpPrevDir, bpTmpDir, bpCurDir, oldLV, conf);
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} else {
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callables.add(new Callable<StorageDirectory>() {
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@Override
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public StorageDirectory call() throws Exception {
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doUpgrade(name, bpSd, nsInfo, bpPrevDir, bpTmpDir, bpCurDir, oldLV,
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conf);
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return bpSd;
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}
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});
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}
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}
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private void doUgrade(String name, final StorageDirectory bpSd,
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private void doUpgrade(String name, final StorageDirectory bpSd,
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NamespaceInfo nsInfo, final File bpPrevDir, final File bpTmpDir,
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final File bpCurDir, final int oldLV, Configuration conf)
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throws IOException {
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@ -37,10 +37,12 @@
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import java.util.TreeMap;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.Future;
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import org.apache.hadoop.HadoopIllegalArgumentException;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceStability;
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import org.apache.hadoop.conf.Configuration;
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@ -51,6 +53,7 @@
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.permission.FsPermission;
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import org.apache.hadoop.hdfs.DFSConfigKeys;
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import org.apache.hadoop.hdfs.DFSUtilClient;
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import org.apache.hadoop.hdfs.HdfsConfiguration;
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import org.apache.hadoop.hdfs.protocol.Block;
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import org.apache.hadoop.hdfs.protocol.LayoutVersion;
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@ -260,8 +263,8 @@ public void build() {
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}
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private StorageDirectory loadStorageDirectory(DataNode datanode,
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NamespaceInfo nsInfo, File dataDir, StartupOption startOpt)
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throws IOException {
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NamespaceInfo nsInfo, File dataDir, StartupOption startOpt,
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List<Callable<StorageDirectory>> callables) throws IOException {
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StorageDirectory sd = new StorageDirectory(dataDir, null, false);
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try {
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StorageState curState = sd.analyzeStorage(startOpt, this);
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@ -287,13 +290,12 @@ private StorageDirectory loadStorageDirectory(DataNode datanode,
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// Each storage directory is treated individually.
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// During startup some of them can upgrade or roll back
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// while others could be up-to-date for the regular startup.
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if (doTransition(sd, nsInfo, startOpt, datanode.getConf())) {
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return sd;
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}
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if (!doTransition(sd, nsInfo, startOpt, callables, datanode.getConf())) {
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// 3. Update successfully loaded storage.
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setServiceLayoutVersion(getServiceLayoutVersion());
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writeProperties(sd);
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// 3. Update successfully loaded storage.
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setServiceLayoutVersion(getServiceLayoutVersion());
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writeProperties(sd);
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}
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return sd;
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} catch (IOException ioe) {
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@ -325,7 +327,7 @@ public VolumeBuilder prepareVolume(DataNode datanode, File volume,
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}
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StorageDirectory sd = loadStorageDirectory(
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datanode, nsInfos.get(0), volume, StartupOption.HOTSWAP);
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datanode, nsInfos.get(0), volume, StartupOption.HOTSWAP, null);
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VolumeBuilder builder =
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new VolumeBuilder(this, sd);
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for (NamespaceInfo nsInfo : nsInfos) {
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@ -336,12 +338,35 @@ public VolumeBuilder prepareVolume(DataNode datanode, File volume,
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final BlockPoolSliceStorage bpStorage = getBlockPoolSliceStorage(nsInfo);
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final List<StorageDirectory> dirs = bpStorage.loadBpStorageDirectories(
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nsInfo, bpDataDirs, StartupOption.HOTSWAP, datanode.getConf());
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nsInfo, bpDataDirs, StartupOption.HOTSWAP, null, datanode.getConf());
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builder.addBpStorageDirectories(nsInfo.getBlockPoolID(), dirs);
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}
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return builder;
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}
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static int getParallelVolumeLoadThreadsNum(int dataDirs, Configuration conf) {
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final String key
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= DFSConfigKeys.DFS_DATANODE_PARALLEL_VOLUME_LOAD_THREADS_NUM_KEY;
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final int n = conf.getInt(key, dataDirs);
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if (n < 1) {
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throw new HadoopIllegalArgumentException(key + " = " + n + " < 1");
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}
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final int min = Math.min(n, dataDirs);
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LOG.info("Using " + min + " threads to upgrade data directories ("
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+ key + "=" + n + ", dataDirs=" + dataDirs + ")");
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return min;
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}
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static class UpgradeTask {
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private final StorageLocation dataDir;
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private final Future<StorageDirectory> future;
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UpgradeTask(StorageLocation dataDir, Future<StorageDirectory> future) {
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this.dataDir = dataDir;
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this.future = future;
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}
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}
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/**
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* Add a list of volumes to be managed by DataStorage. If the volume is empty,
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* format it, otherwise recover it from previous transitions if required.
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@ -356,32 +381,62 @@ public VolumeBuilder prepareVolume(DataNode datanode, File volume,
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synchronized List<StorageDirectory> addStorageLocations(DataNode datanode,
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NamespaceInfo nsInfo, Collection<StorageLocation> dataDirs,
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StartupOption startOpt) throws IOException {
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final List<StorageLocation> successLocations = loadDataStorage(
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datanode, nsInfo, dataDirs, startOpt);
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return loadBlockPoolSliceStorage(
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datanode, nsInfo, successLocations, startOpt);
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final int numThreads = getParallelVolumeLoadThreadsNum(
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dataDirs.size(), datanode.getConf());
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final ExecutorService executor = Executors.newFixedThreadPool(numThreads);
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try {
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final List<StorageLocation> successLocations = loadDataStorage(
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datanode, nsInfo, dataDirs, startOpt, executor);
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return loadBlockPoolSliceStorage(
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datanode, nsInfo, successLocations, startOpt, executor);
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} finally {
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executor.shutdown();
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}
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}
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private List<StorageLocation> loadDataStorage(DataNode datanode,
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NamespaceInfo nsInfo, Collection<StorageLocation> dataDirs,
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StartupOption startOpt) throws IOException {
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StartupOption startOpt, ExecutorService executor) throws IOException {
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final List<StorageLocation> success = Lists.newArrayList();
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final List<UpgradeTask> tasks = Lists.newArrayList();
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for (StorageLocation dataDir : dataDirs) {
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File root = dataDir.getFile();
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if (!containsStorageDir(root)) {
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try {
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// It first ensures the datanode level format is completed.
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final List<Callable<StorageDirectory>> callables
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= Lists.newArrayList();
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final StorageDirectory sd = loadStorageDirectory(
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datanode, nsInfo, root, startOpt);
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addStorageDir(sd);
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datanode, nsInfo, root, startOpt, callables);
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if (callables.isEmpty()) {
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addStorageDir(sd);
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success.add(dataDir);
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} else {
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for(Callable<StorageDirectory> c : callables) {
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tasks.add(new UpgradeTask(dataDir, executor.submit(c)));
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}
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}
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} catch (IOException e) {
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LOG.warn("Failed to add storage directory " + dataDir, e);
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continue;
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}
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} else {
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LOG.info("Storage directory " + dataDir + " has already been used.");
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success.add(dataDir);
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}
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}
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if (!tasks.isEmpty()) {
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LOG.info("loadDataStorage: " + tasks.size() + " upgrade tasks");
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for(UpgradeTask t : tasks) {
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try {
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addStorageDir(t.future.get());
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success.add(t.dataDir);
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} catch (ExecutionException e) {
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LOG.warn("Failed to upgrade storage directory " + t.dataDir, e);
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} catch (InterruptedException e) {
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throw DFSUtilClient.toInterruptedIOException("Task interrupted", e);
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}
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}
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success.add(dataDir);
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}
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return success;
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@ -389,10 +444,11 @@ private List<StorageLocation> loadDataStorage(DataNode datanode,
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private List<StorageDirectory> loadBlockPoolSliceStorage(DataNode datanode,
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NamespaceInfo nsInfo, Collection<StorageLocation> dataDirs,
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StartupOption startOpt) throws IOException {
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StartupOption startOpt, ExecutorService executor) throws IOException {
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final String bpid = nsInfo.getBlockPoolID();
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final BlockPoolSliceStorage bpStorage = getBlockPoolSliceStorage(nsInfo);
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final List<StorageDirectory> success = Lists.newArrayList();
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final List<UpgradeTask> tasks = Lists.newArrayList();
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for (StorageLocation dataDir : dataDirs) {
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final File curDir = new File(dataDir.getFile(), STORAGE_DIR_CURRENT);
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List<File> bpDataDirs = new ArrayList<File>();
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@ -400,10 +456,17 @@ private List<StorageDirectory> loadBlockPoolSliceStorage(DataNode datanode,
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try {
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makeBlockPoolDataDir(bpDataDirs, null);
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final List<Callable<StorageDirectory>> callables = Lists.newArrayList();
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final List<StorageDirectory> dirs = bpStorage.recoverTransitionRead(
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nsInfo, bpDataDirs, startOpt, datanode.getConf());
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for(StorageDirectory sd : dirs) {
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success.add(sd);
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nsInfo, bpDataDirs, startOpt, callables, datanode.getConf());
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if (callables.isEmpty()) {
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for(StorageDirectory sd : dirs) {
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success.add(sd);
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}
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} else {
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for(Callable<StorageDirectory> c : callables) {
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tasks.add(new UpgradeTask(dataDir, executor.submit(c)));
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}
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}
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} catch (IOException e) {
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LOG.warn("Failed to add storage directory " + dataDir
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@ -411,6 +474,20 @@ private List<StorageDirectory> loadBlockPoolSliceStorage(DataNode datanode,
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}
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}
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if (!tasks.isEmpty()) {
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LOG.info("loadBlockPoolSliceStorage: " + tasks.size() + " upgrade tasks");
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for(UpgradeTask t : tasks) {
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try {
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success.add(t.future.get());
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} catch (ExecutionException e) {
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LOG.warn("Failed to upgrade storage directory " + t.dataDir
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+ " for block pool " + bpid, e);
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} catch (InterruptedException e) {
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throw DFSUtilClient.toInterruptedIOException("Task interrupted", e);
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}
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}
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}
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return success;
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}
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@ -655,7 +732,8 @@ void readProperties(StorageDirectory sd, int rollbackLayoutVersion)
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* @return true if the new properties has been written.
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*/
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private boolean doTransition(StorageDirectory sd, NamespaceInfo nsInfo,
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StartupOption startOpt, Configuration conf) throws IOException {
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StartupOption startOpt, List<Callable<StorageDirectory>> callables,
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Configuration conf) throws IOException {
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if (startOpt == StartupOption.ROLLBACK) {
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doRollback(sd, nsInfo); // rollback if applicable
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}
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@ -697,7 +775,7 @@ private boolean doTransition(StorageDirectory sd, NamespaceInfo nsInfo,
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// simply update the properties.
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upgradeProperties(sd);
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} else {
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doUpgradePreFederation(sd, nsInfo, conf);
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doUpgradePreFederation(sd, nsInfo, callables, conf);
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}
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return true; // doUgrade already has written properties
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}
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@ -734,7 +812,9 @@ private boolean doTransition(StorageDirectory sd, NamespaceInfo nsInfo,
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* @param sd storage directory
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*/
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void doUpgradePreFederation(final StorageDirectory sd,
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final NamespaceInfo nsInfo, final Configuration conf) throws IOException {
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final NamespaceInfo nsInfo,
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final List<Callable<StorageDirectory>> callables,
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final Configuration conf) throws IOException {
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final int oldLV = getLayoutVersion();
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LOG.info("Upgrading storage directory " + sd.getRoot()
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+ ".\n old LV = " + oldLV
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|
|
@ -767,10 +847,20 @@ void doUpgradePreFederation(final StorageDirectory sd,
|
|||
bpStorage.format(curDir, nsInfo);
|
||||
|
||||
final File toDir = new File(curBpDir, STORAGE_DIR_CURRENT);
|
||||
doUgrade(sd, nsInfo, prevDir, tmpDir, bbwDir, toDir, oldLV, conf);
|
||||
if (callables == null) {
|
||||
doUpgrade(sd, nsInfo, prevDir, tmpDir, bbwDir, toDir, oldLV, conf);
|
||||
} else {
|
||||
callables.add(new Callable<StorageDirectory>() {
|
||||
@Override
|
||||
public StorageDirectory call() throws Exception {
|
||||
doUpgrade(sd, nsInfo, prevDir, tmpDir, bbwDir, toDir, oldLV, conf);
|
||||
return sd;
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
private void doUgrade(final StorageDirectory sd,
|
||||
private void doUpgrade(final StorageDirectory sd,
|
||||
final NamespaceInfo nsInfo, final File prevDir,
|
||||
final File tmpDir, final File bbwDir, final File toDir, final int oldLV,
|
||||
Configuration conf) throws IOException {
|
||||
|
|
|
|||
Loading…
Reference in New Issue