Java Code Examples for org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskReplicaTracker.RamDiskReplica#getNumReads()
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org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskReplicaTracker.RamDiskReplica#getNumReads() .
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Example 1
Source File: FsDatasetImpl.java From hadoop with Apache License 2.0 | 4 votes |
/** * Attempt to evict one or more transient block replicas we have at least * spaceNeeded bytes free. */ private void evictBlocks() throws IOException { int iterations = 0; while (iterations++ < MAX_BLOCK_EVICTIONS_PER_ITERATION && transientFreeSpaceBelowThreshold()) { RamDiskReplica replicaState = ramDiskReplicaTracker.getNextCandidateForEviction(); if (replicaState == null) { break; } if (LOG.isDebugEnabled()) { LOG.debug("Evicting block " + replicaState); } ReplicaInfo replicaInfo, newReplicaInfo; File blockFile, metaFile; long blockFileUsed, metaFileUsed; final String bpid = replicaState.getBlockPoolId(); synchronized (FsDatasetImpl.this) { replicaInfo = getReplicaInfo(replicaState.getBlockPoolId(), replicaState.getBlockId()); Preconditions.checkState(replicaInfo.getVolume().isTransientStorage()); blockFile = replicaInfo.getBlockFile(); metaFile = replicaInfo.getMetaFile(); blockFileUsed = blockFile.length(); metaFileUsed = metaFile.length(); ramDiskReplicaTracker.discardReplica(replicaState.getBlockPoolId(), replicaState.getBlockId(), false); // Move the replica from lazyPersist/ to finalized/ on target volume BlockPoolSlice bpSlice = replicaState.getLazyPersistVolume().getBlockPoolSlice(bpid); File newBlockFile = bpSlice.activateSavedReplica( replicaInfo, replicaState.getSavedMetaFile(), replicaState.getSavedBlockFile()); newReplicaInfo = new FinalizedReplica(replicaInfo.getBlockId(), replicaInfo.getBytesOnDisk(), replicaInfo.getGenerationStamp(), replicaState.getLazyPersistVolume(), newBlockFile.getParentFile()); // Update the volumeMap entry. volumeMap.add(bpid, newReplicaInfo); // Update metrics datanode.getMetrics().incrRamDiskBlocksEvicted(); datanode.getMetrics().addRamDiskBlocksEvictionWindowMs( Time.monotonicNow() - replicaState.getCreationTime()); if (replicaState.getNumReads() == 0) { datanode.getMetrics().incrRamDiskBlocksEvictedWithoutRead(); } } removeOldReplica(replicaInfo, newReplicaInfo, blockFile, metaFile, blockFileUsed, metaFileUsed, bpid); } }
Example 2
Source File: FsDatasetImpl.java From big-c with Apache License 2.0 | 4 votes |
/** * Attempt to evict one or more transient block replicas we have at least * spaceNeeded bytes free. */ private void evictBlocks() throws IOException { int iterations = 0; while (iterations++ < MAX_BLOCK_EVICTIONS_PER_ITERATION && transientFreeSpaceBelowThreshold()) { RamDiskReplica replicaState = ramDiskReplicaTracker.getNextCandidateForEviction(); if (replicaState == null) { break; } if (LOG.isDebugEnabled()) { LOG.debug("Evicting block " + replicaState); } ReplicaInfo replicaInfo, newReplicaInfo; File blockFile, metaFile; long blockFileUsed, metaFileUsed; final String bpid = replicaState.getBlockPoolId(); synchronized (FsDatasetImpl.this) { replicaInfo = getReplicaInfo(replicaState.getBlockPoolId(), replicaState.getBlockId()); Preconditions.checkState(replicaInfo.getVolume().isTransientStorage()); blockFile = replicaInfo.getBlockFile(); metaFile = replicaInfo.getMetaFile(); blockFileUsed = blockFile.length(); metaFileUsed = metaFile.length(); ramDiskReplicaTracker.discardReplica(replicaState.getBlockPoolId(), replicaState.getBlockId(), false); // Move the replica from lazyPersist/ to finalized/ on target volume BlockPoolSlice bpSlice = replicaState.getLazyPersistVolume().getBlockPoolSlice(bpid); File newBlockFile = bpSlice.activateSavedReplica( replicaInfo, replicaState.getSavedMetaFile(), replicaState.getSavedBlockFile()); newReplicaInfo = new FinalizedReplica(replicaInfo.getBlockId(), replicaInfo.getBytesOnDisk(), replicaInfo.getGenerationStamp(), replicaState.getLazyPersistVolume(), newBlockFile.getParentFile()); // Update the volumeMap entry. volumeMap.add(bpid, newReplicaInfo); // Update metrics datanode.getMetrics().incrRamDiskBlocksEvicted(); datanode.getMetrics().addRamDiskBlocksEvictionWindowMs( Time.monotonicNow() - replicaState.getCreationTime()); if (replicaState.getNumReads() == 0) { datanode.getMetrics().incrRamDiskBlocksEvictedWithoutRead(); } } removeOldReplica(replicaInfo, newReplicaInfo, blockFile, metaFile, blockFileUsed, metaFileUsed, bpid); } }