| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.server.datanode.fsdataset.impl; |
| |
| import java.io.BufferedWriter; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FilenameFilter; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.io.RandomAccessFile; |
| import java.nio.channels.ClosedChannelException; |
| import java.nio.file.Paths; |
| import java.nio.file.StandardCopyOption; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.DF; |
| import org.apache.hadoop.fs.StorageType; |
| import org.apache.hadoop.hdfs.server.datanode.FileIoProvider; |
| import org.apache.hadoop.hdfs.server.datanode.BlockMetadataHeader; |
| import org.apache.hadoop.hdfs.server.datanode.checker.VolumeCheckResult; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.DataNodeVolumeMetrics; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi; |
| import org.apache.hadoop.util.AutoCloseableLock; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.protocol.Block; |
| import org.apache.hadoop.hdfs.protocol.BlockListAsLongs; |
| import org.apache.hadoop.hdfs.protocol.ExtendedBlock; |
| import org.apache.hadoop.hdfs.server.datanode.DataStorage; |
| import org.apache.hadoop.hdfs.server.datanode.DatanodeUtil; |
| import org.apache.hadoop.util.DataChecksum; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeReference; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi; |
| import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage; |
| import org.apache.hadoop.util.CloseableReferenceCount; |
| import org.apache.hadoop.util.DiskChecker.DiskErrorException; |
| import org.apache.hadoop.util.Time; |
| import org.apache.hadoop.util.Timer; |
| import org.codehaus.jackson.annotate.JsonProperty; |
| import org.codehaus.jackson.map.ObjectMapper; |
| import org.codehaus.jackson.map.ObjectReader; |
| import org.codehaus.jackson.map.ObjectWriter; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Preconditions; |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| |
| /** |
| * The underlying volume used to store replica. |
| * |
| * It uses the {@link FsDatasetImpl} object for synchronization. |
| */ |
| @InterfaceAudience.Private |
| @VisibleForTesting |
| public class FsVolumeImpl implements FsVolumeSpi { |
| public static final Logger LOG = |
| LoggerFactory.getLogger(FsVolumeImpl.class); |
| private static final ObjectWriter WRITER = |
| new ObjectMapper().writerWithDefaultPrettyPrinter(); |
| private static final ObjectReader READER = |
| new ObjectMapper().reader(BlockIteratorState.class); |
| |
| private final FsDatasetImpl dataset; |
| private final String storageID; |
| private final StorageType storageType; |
| private final Map<String, BlockPoolSlice> bpSlices |
| = new ConcurrentHashMap<String, BlockPoolSlice>(); |
| private final File currentDir; // <StorageDirectory>/current |
| private final DF usage; |
| private final ReservedSpaceCalculator reserved; |
| private CloseableReferenceCount reference = new CloseableReferenceCount(); |
| |
| // Disk space reserved for blocks (RBW or Re-replicating) open for write. |
| private AtomicLong reservedForReplicas; |
| private long recentReserved = 0; |
| |
| // Capacity configured. This is useful when we want to |
| // limit the visible capacity for tests. If negative, then we just |
| // query from the filesystem. |
| protected volatile long configuredCapacity; |
| private final FileIoProvider fileIoProvider; |
| private final DataNodeVolumeMetrics metrics; |
| |
| /** |
| * Per-volume worker pool that processes new blocks to cache. |
| * The maximum number of workers per volume is bounded (configurable via |
| * dfs.datanode.fsdatasetcache.max.threads.per.volume) to limit resource |
| * contention. |
| */ |
| protected ThreadPoolExecutor cacheExecutor; |
| |
| FsVolumeImpl(FsDatasetImpl dataset, String storageID, File currentDir, |
| Configuration conf, StorageType storageType) throws IOException { |
| // outside tests, usage created in ReservedSpaceCalculator.Builder |
| this(dataset, storageID, currentDir, conf, storageType, null); |
| } |
| |
| FsVolumeImpl(FsDatasetImpl dataset, String storageID, File currentDir, |
| Configuration conf, StorageType storageType, DF usage) |
| throws IOException { |
| this.dataset = dataset; |
| this.storageID = storageID; |
| this.reservedForReplicas = new AtomicLong(0L); |
| this.currentDir = currentDir; |
| File parent = currentDir.getParentFile(); |
| this.storageType = storageType; |
| this.configuredCapacity = -1; |
| |
| if (usage == null) { |
| usage = new DF(parent, conf); |
| } |
| this.usage = usage; |
| // dataset.datanode may be null in some tests. |
| this.fileIoProvider = dataset.datanode != null ? |
| dataset.datanode.getFileIoProvider() : |
| new FileIoProvider(conf, dataset.datanode); |
| cacheExecutor = initializeCacheExecutor(parent); |
| this.metrics = DataNodeVolumeMetrics.create(conf, parent.getAbsolutePath()); |
| this.reserved = new ReservedSpaceCalculator.Builder(conf) |
| .setUsage(usage).setStorageType(storageType).build(); |
| } |
| |
| protected ThreadPoolExecutor initializeCacheExecutor(File parent) { |
| if (storageType.isTransient()) { |
| return null; |
| } |
| if (dataset.datanode == null) { |
| // FsVolumeImpl is used in test. |
| return null; |
| } |
| |
| final int maxNumThreads = dataset.datanode.getConf().getInt( |
| DFSConfigKeys.DFS_DATANODE_FSDATASETCACHE_MAX_THREADS_PER_VOLUME_KEY, |
| DFSConfigKeys.DFS_DATANODE_FSDATASETCACHE_MAX_THREADS_PER_VOLUME_DEFAULT); |
| |
| ThreadFactory workerFactory = new ThreadFactoryBuilder() |
| .setDaemon(true) |
| .setNameFormat("FsVolumeImplWorker-" + parent.toString() + "-%d") |
| .build(); |
| ThreadPoolExecutor executor = new ThreadPoolExecutor( |
| 1, maxNumThreads, |
| 60, TimeUnit.SECONDS, |
| new LinkedBlockingQueue<Runnable>(), |
| workerFactory); |
| executor.allowCoreThreadTimeOut(true); |
| return executor; |
| } |
| |
| private void printReferenceTraceInfo(String op) { |
| StackTraceElement[] stack = Thread.currentThread().getStackTrace(); |
| for (StackTraceElement ste : stack) { |
| switch (ste.getMethodName()) { |
| case "getDfsUsed": |
| case "getBlockPoolUsed": |
| case "getAvailable": |
| case "getVolumeMap": |
| return; |
| default: |
| break; |
| } |
| } |
| FsDatasetImpl.LOG.trace("Reference count: " + op + " " + this + ": " + |
| this.reference.getReferenceCount()); |
| FsDatasetImpl.LOG.trace( |
| Joiner.on("\n").join(Thread.currentThread().getStackTrace())); |
| } |
| |
| /** |
| * Increase the reference count. The caller must increase the reference count |
| * before issuing IOs. |
| * |
| * @throws IOException if the volume is already closed. |
| */ |
| private void reference() throws ClosedChannelException { |
| this.reference.reference(); |
| if (FsDatasetImpl.LOG.isTraceEnabled()) { |
| printReferenceTraceInfo("incr"); |
| } |
| } |
| |
| /** |
| * Decrease the reference count. |
| */ |
| private void unreference() { |
| if (FsDatasetImpl.LOG.isTraceEnabled()) { |
| printReferenceTraceInfo("desc"); |
| } |
| if (FsDatasetImpl.LOG.isDebugEnabled()) { |
| if (reference.getReferenceCount() <= 0) { |
| FsDatasetImpl.LOG.debug("Decrease reference count <= 0 on " + this + |
| Joiner.on("\n").join(Thread.currentThread().getStackTrace())); |
| } |
| } |
| checkReference(); |
| this.reference.unreference(); |
| } |
| |
| private static class FsVolumeReferenceImpl implements FsVolumeReference { |
| private FsVolumeImpl volume; |
| |
| FsVolumeReferenceImpl(FsVolumeImpl volume) throws ClosedChannelException { |
| this.volume = volume; |
| volume.reference(); |
| } |
| |
| /** |
| * Decreases the reference count. |
| * @throws IOException it never throws IOException. |
| */ |
| @Override |
| public void close() throws IOException { |
| if (volume != null) { |
| volume.unreference(); |
| volume = null; |
| } |
| } |
| |
| @Override |
| public FsVolumeSpi getVolume() { |
| return this.volume; |
| } |
| } |
| |
| @Override |
| public FsVolumeReference obtainReference() throws ClosedChannelException { |
| return new FsVolumeReferenceImpl(this); |
| } |
| |
| private void checkReference() { |
| Preconditions.checkState(reference.getReferenceCount() > 0); |
| } |
| |
| @VisibleForTesting |
| int getReferenceCount() { |
| return this.reference.getReferenceCount(); |
| } |
| |
| /** |
| * Close this volume. |
| * @throws IOException if the volume is closed. |
| */ |
| void setClosed() throws IOException { |
| try { |
| this.reference.setClosed(); |
| dataset.stopAllDataxceiverThreads(this); |
| } catch (ClosedChannelException e) { |
| throw new IOException("The volume has already closed.", e); |
| } |
| } |
| |
| /** |
| * Check whether this volume has successfully been closed. |
| */ |
| boolean checkClosed() { |
| if (this.reference.getReferenceCount() > 0) { |
| if (FsDatasetImpl.LOG.isDebugEnabled()) { |
| FsDatasetImpl.LOG.debug(String.format( |
| "The reference count for %s is %d, wait to be 0.", |
| this, reference.getReferenceCount())); |
| } |
| return false; |
| } |
| return true; |
| } |
| |
| File getCurrentDir() { |
| return currentDir; |
| } |
| |
| File getRbwDir(String bpid) throws IOException { |
| return getBlockPoolSlice(bpid).getRbwDir(); |
| } |
| |
| File getLazyPersistDir(String bpid) throws IOException { |
| return getBlockPoolSlice(bpid).getLazypersistDir(); |
| } |
| |
| File getTmpDir(String bpid) throws IOException { |
| return getBlockPoolSlice(bpid).getTmpDir(); |
| } |
| |
| void onBlockFileDeletion(String bpid, long value) { |
| decDfsUsedAndNumBlocks(bpid, value, true); |
| if (isTransientStorage()) { |
| dataset.releaseLockedMemory(value, true); |
| } |
| } |
| |
| void onMetaFileDeletion(String bpid, long value) { |
| decDfsUsedAndNumBlocks(bpid, value, false); |
| } |
| |
| private void decDfsUsedAndNumBlocks(String bpid, long value, |
| boolean blockFileDeleted) { |
| try(AutoCloseableLock lock = dataset.acquireDatasetLock()) { |
| BlockPoolSlice bp = bpSlices.get(bpid); |
| if (bp != null) { |
| bp.decDfsUsed(value); |
| if (blockFileDeleted) { |
| bp.decrNumBlocks(); |
| } |
| } |
| } |
| } |
| |
| void incDfsUsedAndNumBlocks(String bpid, long value) { |
| try(AutoCloseableLock lock = dataset.acquireDatasetLock()) { |
| BlockPoolSlice bp = bpSlices.get(bpid); |
| if (bp != null) { |
| bp.incDfsUsed(value); |
| bp.incrNumBlocks(); |
| } |
| } |
| } |
| |
| void incDfsUsed(String bpid, long value) { |
| try(AutoCloseableLock lock = dataset.acquireDatasetLock()) { |
| BlockPoolSlice bp = bpSlices.get(bpid); |
| if (bp != null) { |
| bp.incDfsUsed(value); |
| } |
| } |
| } |
| |
| @VisibleForTesting |
| public long getDfsUsed() throws IOException { |
| long dfsUsed = 0; |
| try(AutoCloseableLock lock = dataset.acquireDatasetLock()) { |
| for(BlockPoolSlice s : bpSlices.values()) { |
| dfsUsed += s.getDfsUsed(); |
| } |
| } |
| return dfsUsed; |
| } |
| |
| long getBlockPoolUsed(String bpid) throws IOException { |
| return getBlockPoolSlice(bpid).getDfsUsed(); |
| } |
| |
| /** |
| * Return either the configured capacity of the file system if configured; or |
| * the capacity of the file system excluding space reserved for non-HDFS. |
| * |
| * @return the unreserved number of bytes left in this filesystem. May be |
| * zero. |
| */ |
| @VisibleForTesting |
| public long getCapacity() { |
| if (configuredCapacity < 0) { |
| long remaining = usage.getCapacity() - getReserved(); |
| return remaining > 0 ? remaining : 0; |
| } |
| |
| return configuredCapacity; |
| } |
| |
| /** |
| * This function MUST NOT be used outside of tests. |
| * |
| * @param capacity |
| */ |
| @VisibleForTesting |
| public void setCapacityForTesting(long capacity) { |
| this.configuredCapacity = capacity; |
| } |
| |
| /* |
| * Calculate the available space of the filesystem, excluding space reserved |
| * for non-HDFS and space reserved for RBW |
| * |
| * @return the available number of bytes left in this filesystem. May be zero. |
| */ |
| @Override |
| public long getAvailable() throws IOException { |
| long remaining = getCapacity() - getDfsUsed() - getReservedForReplicas(); |
| long available = usage.getAvailable() - getRemainingReserved() |
| - getReservedForReplicas(); |
| if (remaining > available) { |
| remaining = available; |
| } |
| return (remaining > 0) ? remaining : 0; |
| } |
| |
| long getActualNonDfsUsed() throws IOException { |
| return usage.getUsed() - getDfsUsed(); |
| } |
| |
| private long getRemainingReserved() throws IOException { |
| long actualNonDfsUsed = getActualNonDfsUsed(); |
| long actualReserved = getReserved(); |
| if (actualNonDfsUsed < actualReserved) { |
| return actualReserved - actualNonDfsUsed; |
| } |
| return 0L; |
| } |
| |
| /** |
| * Unplanned Non-DFS usage, i.e. Extra usage beyond reserved. |
| * |
| * @return |
| * @throws IOException |
| */ |
| public long getNonDfsUsed() throws IOException { |
| long actualNonDfsUsed = getActualNonDfsUsed(); |
| long actualReserved = getReserved(); |
| if (actualNonDfsUsed < actualReserved) { |
| return 0L; |
| } |
| return actualNonDfsUsed - actualReserved; |
| } |
| |
| @VisibleForTesting |
| long getDfAvailable() { |
| return usage.getAvailable(); |
| } |
| |
| @VisibleForTesting |
| public long getReservedForReplicas() { |
| return reservedForReplicas.get(); |
| } |
| |
| @VisibleForTesting |
| long getRecentReserved() { |
| return recentReserved; |
| } |
| |
| long getReserved(){ |
| return reserved.getReserved(); |
| } |
| |
| BlockPoolSlice getBlockPoolSlice(String bpid) throws IOException { |
| BlockPoolSlice bp = bpSlices.get(bpid); |
| if (bp == null) { |
| throw new IOException("block pool " + bpid + " is not found"); |
| } |
| return bp; |
| } |
| |
| @Override |
| public String getBasePath() { |
| return currentDir.getParent(); |
| } |
| |
| @Override |
| public boolean isTransientStorage() { |
| return storageType.isTransient(); |
| } |
| |
| @Override |
| public String getPath(String bpid) throws IOException { |
| return getBlockPoolSlice(bpid).getDirectory().getAbsolutePath(); |
| } |
| |
| @Override |
| public File getFinalizedDir(String bpid) throws IOException { |
| return getBlockPoolSlice(bpid).getFinalizedDir(); |
| } |
| |
| /** |
| * Make a deep copy of the list of currently active BPIDs |
| */ |
| @Override |
| public String[] getBlockPoolList() { |
| return bpSlices.keySet().toArray(new String[bpSlices.keySet().size()]); |
| } |
| |
| /** |
| * Temporary files. They get moved to the finalized block directory when |
| * the block is finalized. |
| */ |
| File createTmpFile(String bpid, Block b) throws IOException { |
| checkReference(); |
| reserveSpaceForReplica(b.getNumBytes()); |
| try { |
| return getBlockPoolSlice(bpid).createTmpFile(b); |
| } catch (IOException exception) { |
| releaseReservedSpace(b.getNumBytes()); |
| throw exception; |
| } |
| } |
| |
| @Override |
| public void reserveSpaceForReplica(long bytesToReserve) { |
| if (bytesToReserve != 0) { |
| reservedForReplicas.addAndGet(bytesToReserve); |
| recentReserved = bytesToReserve; |
| } |
| } |
| |
| @Override |
| public void releaseReservedSpace(long bytesToRelease) { |
| if (bytesToRelease != 0) { |
| |
| long oldReservation, newReservation; |
| do { |
| oldReservation = reservedForReplicas.get(); |
| newReservation = oldReservation - bytesToRelease; |
| if (newReservation < 0) { |
| // Failsafe, this should never occur in practice, but if it does we |
| // don't want to start advertising more space than we have available. |
| newReservation = 0; |
| } |
| } while (!reservedForReplicas.compareAndSet(oldReservation, |
| newReservation)); |
| } |
| } |
| |
| @Override |
| public void releaseLockedMemory(long bytesToRelease) { |
| if (isTransientStorage()) { |
| dataset.releaseLockedMemory(bytesToRelease, false); |
| } |
| } |
| |
| private enum SubdirFilter implements FilenameFilter { |
| INSTANCE; |
| |
| @Override |
| public boolean accept(File dir, String name) { |
| return name.startsWith("subdir"); |
| } |
| } |
| |
| private enum BlockFileFilter implements FilenameFilter { |
| INSTANCE; |
| |
| @Override |
| public boolean accept(File dir, String name) { |
| return !name.endsWith(".meta") && |
| name.startsWith(Block.BLOCK_FILE_PREFIX); |
| } |
| } |
| |
| @VisibleForTesting |
| public static String nextSorted(List<String> arr, String prev) { |
| int res = 0; |
| if (prev != null) { |
| res = Collections.binarySearch(arr, prev); |
| if (res < 0) { |
| res = -1 - res; |
| } else { |
| res++; |
| } |
| } |
| if (res >= arr.size()) { |
| return null; |
| } |
| return arr.get(res); |
| } |
| |
| private static class BlockIteratorState { |
| BlockIteratorState() { |
| lastSavedMs = iterStartMs = Time.now(); |
| curFinalizedDir = null; |
| curFinalizedSubDir = null; |
| curEntry = null; |
| atEnd = false; |
| } |
| |
| // The wall-clock ms since the epoch at which this iterator was last saved. |
| @JsonProperty |
| private long lastSavedMs; |
| |
| // The wall-clock ms since the epoch at which this iterator was created. |
| @JsonProperty |
| private long iterStartMs; |
| |
| @JsonProperty |
| private String curFinalizedDir; |
| |
| @JsonProperty |
| private String curFinalizedSubDir; |
| |
| @JsonProperty |
| private String curEntry; |
| |
| @JsonProperty |
| private boolean atEnd; |
| } |
| |
| /** |
| * A BlockIterator implementation for FsVolumeImpl. |
| */ |
| private class BlockIteratorImpl implements FsVolumeSpi.BlockIterator { |
| private final File bpidDir; |
| private final String name; |
| private final String bpid; |
| private long maxStalenessMs = 0; |
| |
| private List<String> cache; |
| private long cacheMs; |
| |
| private BlockIteratorState state; |
| |
| BlockIteratorImpl(String bpid, String name) { |
| this.bpidDir = new File(currentDir, bpid); |
| this.name = name; |
| this.bpid = bpid; |
| rewind(); |
| } |
| |
| /** |
| * Get the next subdirectory within the block pool slice. |
| * |
| * @return The next subdirectory within the block pool slice, or |
| * null if there are no more. |
| */ |
| private String getNextSubDir(String prev, File dir) |
| throws IOException { |
| List<String> children = fileIoProvider.listDirectory( |
| FsVolumeImpl.this, dir, SubdirFilter.INSTANCE); |
| cache = null; |
| cacheMs = 0; |
| if (children.size() == 0) { |
| LOG.trace("getNextSubDir({}, {}): no subdirectories found in {}", |
| storageID, bpid, dir.getAbsolutePath()); |
| return null; |
| } |
| Collections.sort(children); |
| String nextSubDir = nextSorted(children, prev); |
| if (nextSubDir == null) { |
| LOG.trace("getNextSubDir({}, {}): no more subdirectories found in {}", |
| storageID, bpid, dir.getAbsolutePath()); |
| } else { |
| LOG.trace("getNextSubDir({}, {}): picking next subdirectory {} " + |
| "within {}", storageID, bpid, nextSubDir, dir.getAbsolutePath()); |
| } |
| return nextSubDir; |
| } |
| |
| private String getNextFinalizedDir() throws IOException { |
| File dir = Paths.get( |
| bpidDir.getAbsolutePath(), "current", "finalized").toFile(); |
| return getNextSubDir(state.curFinalizedDir, dir); |
| } |
| |
| private String getNextFinalizedSubDir() throws IOException { |
| if (state.curFinalizedDir == null) { |
| return null; |
| } |
| File dir = Paths.get( |
| bpidDir.getAbsolutePath(), "current", "finalized", |
| state.curFinalizedDir).toFile(); |
| return getNextSubDir(state.curFinalizedSubDir, dir); |
| } |
| |
| private List<String> getSubdirEntries() throws IOException { |
| if (state.curFinalizedSubDir == null) { |
| return null; // There are no entries in the null subdir. |
| } |
| long now = Time.monotonicNow(); |
| if (cache != null) { |
| long delta = now - cacheMs; |
| if (delta < maxStalenessMs) { |
| return cache; |
| } else { |
| LOG.trace("getSubdirEntries({}, {}): purging entries cache for {} " + |
| "after {} ms.", storageID, bpid, state.curFinalizedSubDir, delta); |
| cache = null; |
| } |
| } |
| File dir = Paths.get(bpidDir.getAbsolutePath(), "current", "finalized", |
| state.curFinalizedDir, state.curFinalizedSubDir).toFile(); |
| List<String> entries = fileIoProvider.listDirectory( |
| FsVolumeImpl.this, dir, BlockFileFilter.INSTANCE); |
| if (entries.size() == 0) { |
| entries = null; |
| } else { |
| Collections.sort(entries); |
| } |
| if (entries == null) { |
| LOG.trace("getSubdirEntries({}, {}): no entries found in {}", |
| storageID, bpid, dir.getAbsolutePath()); |
| } else { |
| LOG.trace("getSubdirEntries({}, {}): listed {} entries in {}", |
| storageID, bpid, entries.size(), dir.getAbsolutePath()); |
| } |
| cache = entries; |
| cacheMs = now; |
| return cache; |
| } |
| |
| /** |
| * Get the next block.<p/> |
| * |
| * Each volume has a hierarchical structure.<p/> |
| * |
| * <code> |
| * BPID B0 |
| * finalized/ |
| * subdir0 |
| * subdir0 |
| * blk_000 |
| * blk_001 |
| * ... |
| * subdir1 |
| * subdir0 |
| * ... |
| * rbw/ |
| * </code> |
| * |
| * When we run out of entries at one level of the structure, we search |
| * progressively higher levels. For example, when we run out of blk_ |
| * entries in a subdirectory, we search for the next subdirectory. |
| * And so on. |
| */ |
| @Override |
| public ExtendedBlock nextBlock() throws IOException { |
| if (state.atEnd) { |
| return null; |
| } |
| try { |
| while (true) { |
| List<String> entries = getSubdirEntries(); |
| if (entries != null) { |
| state.curEntry = nextSorted(entries, state.curEntry); |
| if (state.curEntry == null) { |
| LOG.trace("nextBlock({}, {}): advancing from {} to next " + |
| "subdirectory.", storageID, bpid, state.curFinalizedSubDir); |
| } else { |
| ExtendedBlock block = |
| new ExtendedBlock(bpid, Block.filename2id(state.curEntry)); |
| File expectedBlockDir = DatanodeUtil.idToBlockDir( |
| new File("."), block.getBlockId()); |
| File actualBlockDir = Paths.get(".", |
| state.curFinalizedDir, state.curFinalizedSubDir).toFile(); |
| if (!expectedBlockDir.equals(actualBlockDir)) { |
| LOG.error("nextBlock({}, {}): block id {} found in invalid " + |
| "directory. Expected directory: {}. " + |
| "Actual directory: {}", storageID, bpid, |
| block.getBlockId(), expectedBlockDir.getPath(), |
| actualBlockDir.getPath()); |
| continue; |
| } |
| LOG.trace("nextBlock({}, {}): advancing to {}", |
| storageID, bpid, block); |
| return block; |
| } |
| } |
| state.curFinalizedSubDir = getNextFinalizedSubDir(); |
| if (state.curFinalizedSubDir == null) { |
| state.curFinalizedDir = getNextFinalizedDir(); |
| if (state.curFinalizedDir == null) { |
| state.atEnd = true; |
| return null; |
| } |
| } |
| } |
| } catch (IOException e) { |
| state.atEnd = true; |
| LOG.error("nextBlock({}, {}): I/O error", storageID, bpid, e); |
| throw e; |
| } |
| } |
| |
| @Override |
| public boolean atEnd() { |
| return state.atEnd; |
| } |
| |
| @Override |
| public void rewind() { |
| cache = null; |
| cacheMs = 0; |
| state = new BlockIteratorState(); |
| } |
| |
| @Override |
| public void save() throws IOException { |
| state.lastSavedMs = Time.now(); |
| boolean success = false; |
| try (BufferedWriter writer = new BufferedWriter( |
| new OutputStreamWriter(fileIoProvider.getFileOutputStream( |
| FsVolumeImpl.this, getTempSaveFile()), "UTF-8"))) { |
| WRITER.writeValue(writer, state); |
| success = true; |
| } finally { |
| if (!success) { |
| fileIoProvider.delete(FsVolumeImpl.this, getTempSaveFile()); |
| } |
| } |
| fileIoProvider.move(FsVolumeImpl.this, |
| getTempSaveFile().toPath(), getSaveFile().toPath(), |
| StandardCopyOption.ATOMIC_MOVE); |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("save({}, {}): saved {}", storageID, bpid, |
| WRITER.writeValueAsString(state)); |
| } |
| } |
| |
| public void load() throws IOException { |
| File file = getSaveFile(); |
| this.state = READER.readValue(file); |
| LOG.trace("load({}, {}): loaded iterator {} from {}: {}", storageID, |
| bpid, name, file.getAbsoluteFile(), |
| WRITER.writeValueAsString(state)); |
| } |
| |
| File getSaveFile() { |
| return new File(bpidDir, name + ".cursor"); |
| } |
| |
| File getTempSaveFile() { |
| return new File(bpidDir, name + ".cursor.tmp"); |
| } |
| |
| @Override |
| public void setMaxStalenessMs(long maxStalenessMs) { |
| this.maxStalenessMs = maxStalenessMs; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| // No action needed for this volume implementation. |
| } |
| |
| @Override |
| public long getIterStartMs() { |
| return state.iterStartMs; |
| } |
| |
| @Override |
| public long getLastSavedMs() { |
| return state.lastSavedMs; |
| } |
| |
| @Override |
| public String getBlockPoolId() { |
| return bpid; |
| } |
| } |
| |
| @Override |
| public BlockIterator newBlockIterator(String bpid, String name) { |
| return new BlockIteratorImpl(bpid, name); |
| } |
| |
| @Override |
| public BlockIterator loadBlockIterator(String bpid, String name) |
| throws IOException { |
| BlockIteratorImpl iter = new BlockIteratorImpl(bpid, name); |
| iter.load(); |
| return iter; |
| } |
| |
| @Override |
| public FsDatasetSpi<? extends FsVolumeSpi> getDataset() { |
| return dataset; |
| } |
| |
| /** |
| * RBW files. They get moved to the finalized block directory when |
| * the block is finalized. |
| */ |
| File createRbwFile(String bpid, Block b) throws IOException { |
| checkReference(); |
| reserveSpaceForReplica(b.getNumBytes()); |
| try { |
| return getBlockPoolSlice(bpid).createRbwFile(b); |
| } catch (IOException exception) { |
| releaseReservedSpace(b.getNumBytes()); |
| throw exception; |
| } |
| } |
| |
| /** |
| * |
| * @param bytesReserved Space that was reserved during |
| * block creation. Now that the block is being finalized we |
| * can free up this space. |
| * @return |
| * @throws IOException |
| */ |
| File addFinalizedBlock(String bpid, Block b, File f, long bytesReserved) |
| throws IOException { |
| releaseReservedSpace(bytesReserved); |
| return getBlockPoolSlice(bpid).addBlock(b, f); |
| } |
| |
| Executor getCacheExecutor() { |
| return cacheExecutor; |
| } |
| |
| @Override |
| public VolumeCheckResult check(VolumeCheckContext ignored) |
| throws DiskErrorException { |
| // TODO:FEDERATION valid synchronization |
| for(BlockPoolSlice s : bpSlices.values()) { |
| s.checkDirs(); |
| } |
| return VolumeCheckResult.HEALTHY; |
| } |
| |
| void getVolumeMap(ReplicaMap volumeMap, |
| final RamDiskReplicaTracker ramDiskReplicaMap) |
| throws IOException { |
| for(BlockPoolSlice s : bpSlices.values()) { |
| s.getVolumeMap(volumeMap, ramDiskReplicaMap); |
| } |
| } |
| |
| void getVolumeMap(String bpid, ReplicaMap volumeMap, |
| final RamDiskReplicaTracker ramDiskReplicaMap) |
| throws IOException { |
| getBlockPoolSlice(bpid).getVolumeMap(volumeMap, ramDiskReplicaMap); |
| } |
| |
| long getNumBlocks() { |
| long numBlocks = 0; |
| for (BlockPoolSlice s : bpSlices.values()) { |
| numBlocks += s.getNumOfBlocks(); |
| } |
| return numBlocks; |
| } |
| |
| @Override |
| public String toString() { |
| return currentDir.getAbsolutePath(); |
| } |
| |
| void shutdown() { |
| if (cacheExecutor != null) { |
| cacheExecutor.shutdown(); |
| } |
| Set<Entry<String, BlockPoolSlice>> set = bpSlices.entrySet(); |
| for (Entry<String, BlockPoolSlice> entry : set) { |
| entry.getValue().shutdown(null); |
| } |
| if (metrics != null) { |
| metrics.unRegister(); |
| } |
| } |
| |
| void addBlockPool(String bpid, Configuration conf) throws IOException { |
| addBlockPool(bpid, conf, null); |
| } |
| |
| void addBlockPool(String bpid, Configuration conf, Timer timer) |
| throws IOException { |
| File bpdir = new File(currentDir, bpid); |
| BlockPoolSlice bp; |
| if (timer == null) { |
| bp = new BlockPoolSlice(bpid, this, bpdir, conf, new Timer()); |
| } else { |
| bp = new BlockPoolSlice(bpid, this, bpdir, conf, timer); |
| } |
| bpSlices.put(bpid, bp); |
| } |
| |
| void shutdownBlockPool(String bpid, BlockListAsLongs blocksListsAsLongs) { |
| BlockPoolSlice bp = bpSlices.get(bpid); |
| if (bp != null) { |
| bp.shutdown(blocksListsAsLongs); |
| } |
| bpSlices.remove(bpid); |
| } |
| |
| boolean isBPDirEmpty(String bpid) throws IOException { |
| File volumeCurrentDir = this.getCurrentDir(); |
| File bpDir = new File(volumeCurrentDir, bpid); |
| File bpCurrentDir = new File(bpDir, DataStorage.STORAGE_DIR_CURRENT); |
| File finalizedDir = new File(bpCurrentDir, |
| DataStorage.STORAGE_DIR_FINALIZED); |
| File rbwDir = new File(bpCurrentDir, DataStorage.STORAGE_DIR_RBW); |
| if (fileIoProvider.exists(this, finalizedDir) && |
| !DatanodeUtil.dirNoFilesRecursive(this, finalizedDir, fileIoProvider)) { |
| return false; |
| } |
| if (fileIoProvider.exists(this, rbwDir) && |
| fileIoProvider.list(this, rbwDir).length != 0) { |
| return false; |
| } |
| return true; |
| } |
| |
| void deleteBPDirectories(String bpid, boolean force) throws IOException { |
| File volumeCurrentDir = this.getCurrentDir(); |
| File bpDir = new File(volumeCurrentDir, bpid); |
| if (!bpDir.isDirectory()) { |
| // nothing to be deleted |
| return; |
| } |
| File tmpDir = new File(bpDir, DataStorage.STORAGE_DIR_TMP); |
| File bpCurrentDir = new File(bpDir, DataStorage.STORAGE_DIR_CURRENT); |
| File finalizedDir = new File(bpCurrentDir, |
| DataStorage.STORAGE_DIR_FINALIZED); |
| File lazypersistDir = new File(bpCurrentDir, |
| DataStorage.STORAGE_DIR_LAZY_PERSIST); |
| File rbwDir = new File(bpCurrentDir, DataStorage.STORAGE_DIR_RBW); |
| if (force) { |
| fileIoProvider.fullyDelete(this, bpDir); |
| } else { |
| if (!fileIoProvider.delete(this, rbwDir)) { |
| throw new IOException("Failed to delete " + rbwDir); |
| } |
| if (!DatanodeUtil.dirNoFilesRecursive( |
| this, finalizedDir, fileIoProvider) || |
| !fileIoProvider.fullyDelete( |
| this, finalizedDir)) { |
| throw new IOException("Failed to delete " + finalizedDir); |
| } |
| if (lazypersistDir.exists() && |
| ((!DatanodeUtil.dirNoFilesRecursive( |
| this, lazypersistDir, fileIoProvider) || |
| !fileIoProvider.fullyDelete(this, lazypersistDir)))) { |
| throw new IOException("Failed to delete " + lazypersistDir); |
| } |
| fileIoProvider.fullyDelete(this, tmpDir); |
| for (File f : fileIoProvider.listFiles(this, bpCurrentDir)) { |
| if (!fileIoProvider.delete(this, f)) { |
| throw new IOException("Failed to delete " + f); |
| } |
| } |
| if (!fileIoProvider.delete(this, bpCurrentDir)) { |
| throw new IOException("Failed to delete " + bpCurrentDir); |
| } |
| for (File f : fileIoProvider.listFiles(this, bpDir)) { |
| if (!fileIoProvider.delete(this, f)) { |
| throw new IOException("Failed to delete " + f); |
| } |
| } |
| if (!fileIoProvider.delete(this, bpDir)) { |
| throw new IOException("Failed to delete " + bpDir); |
| } |
| } |
| } |
| |
| @Override |
| public String getStorageID() { |
| return storageID; |
| } |
| |
| @Override |
| public StorageType getStorageType() { |
| return storageType; |
| } |
| |
| DatanodeStorage toDatanodeStorage() { |
| return new DatanodeStorage(storageID, DatanodeStorage.State.NORMAL, storageType); |
| } |
| |
| |
| @Override |
| public byte[] loadLastPartialChunkChecksum( |
| File blockFile, File metaFile) throws IOException { |
| DataChecksum dcs; |
| |
| try (FileInputStream fis = fileIoProvider.getFileInputStream( |
| this, metaFile)) { |
| dcs = BlockMetadataHeader.readHeader(fis).getChecksum(); |
| } |
| |
| final int checksumSize = dcs.getChecksumSize(); |
| final long onDiskLen = blockFile.length(); |
| final int bytesPerChecksum = dcs.getBytesPerChecksum(); |
| |
| if (onDiskLen % bytesPerChecksum == 0) { |
| // the last chunk is a complete one. No need to preserve its checksum |
| // because it will not be modified. |
| return null; |
| } |
| |
| long offsetInChecksum = BlockMetadataHeader.getHeaderSize() + |
| (onDiskLen / bytesPerChecksum) * checksumSize; |
| byte[] lastChecksum = new byte[checksumSize]; |
| try (RandomAccessFile raf = fileIoProvider.getRandomAccessFile( |
| this, metaFile, "r")) { |
| raf.seek(offsetInChecksum); |
| int readBytes = raf.read(lastChecksum, 0, checksumSize); |
| if (readBytes == -1) { |
| throw new IOException("Expected to read " + checksumSize + |
| " bytes from offset " + offsetInChecksum + |
| " but reached end of file."); |
| } else if (readBytes != checksumSize) { |
| throw new IOException("Expected to read " + checksumSize + |
| " bytes from offset " + offsetInChecksum + " but read " + |
| readBytes + " bytes."); |
| } |
| } |
| return lastChecksum; |
| } |
| |
| @Override |
| public FileIoProvider getFileIoProvider() { |
| return fileIoProvider; |
| } |
| |
| |
| @Override |
| public DataNodeVolumeMetrics getMetrics() { |
| return metrics; |
| } |
| } |
