HDFS-6955. DN should reserve disk space for a full block when creating tmp files (Contributed by Kanaka Kumar Avvaru)
This commit is contained in:
Vinayakumar B
parent
a7201d635f
commit
92c1af1646
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@ -117,7 +117,7 @@ class BlockReceiver implements Closeable {
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/** the block to receive */
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private final ExtendedBlock block;
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/** the replica to write */
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private final ReplicaInPipelineInterface replicaInfo;
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private ReplicaInPipelineInterface replicaInfo;
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/** pipeline stage */
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private final BlockConstructionStage stage;
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private final boolean isTransfer;
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@ -259,6 +259,9 @@ class BlockReceiver implements Closeable {
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} catch (ReplicaNotFoundException bne) {
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throw bne;
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} catch(IOException ioe) {
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if (replicaInfo != null) {
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replicaInfo.releaseAllBytesReserved();
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}
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IOUtils.closeStream(this);
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cleanupBlock();
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@ -62,13 +62,13 @@ public interface FsVolumeSpi {
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boolean isTransientStorage();
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/**
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* Reserve disk space for an RBW block so a writer does not run out of
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* space before the block is full.
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* Reserve disk space for a block (RBW or Re-replicating)
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* so a writer does not run out of space before the block is full.
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*/
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void reserveSpaceForRbw(long bytesToReserve);
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void reserveSpaceForReplica(long bytesToReserve);
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/**
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* Release disk space previously reserved for RBW block.
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* Release disk space previously reserved for block opened for write.
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*/
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void releaseReservedSpace(long bytesToRelease);
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@ -1157,7 +1157,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
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// Replace finalized replica by a RBW replica in replicas map
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volumeMap.add(bpid, newReplicaInfo);
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v.reserveSpaceForRbw(estimateBlockLen - replicaInfo.getNumBytes());
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v.reserveSpaceForReplica(estimateBlockLen - replicaInfo.getNumBytes());
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return newReplicaInfo;
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}
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@ -1487,7 +1487,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
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}
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ReplicaInPipeline newReplicaInfo =
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new ReplicaInPipeline(b.getBlockId(), b.getGenerationStamp(), v,
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f.getParentFile(), 0);
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f.getParentFile(), b.getLocalBlock().getNumBytes());
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volumeMap.add(b.getBlockPoolId(), newReplicaInfo);
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return new ReplicaHandler(newReplicaInfo, ref);
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} else {
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@ -2555,14 +2555,15 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
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final long usedSpace; // size of space used by HDFS
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final long freeSpace; // size of free space excluding reserved space
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final long reservedSpace; // size of space reserved for non-HDFS
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final long reservedSpaceForRBW; // size of space reserved RBW
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final long reservedSpaceForReplicas; // size of space reserved RBW or
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// re-replication
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VolumeInfo(FsVolumeImpl v, long usedSpace, long freeSpace) {
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this.directory = v.toString();
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this.usedSpace = usedSpace;
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this.freeSpace = freeSpace;
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this.reservedSpace = v.getReserved();
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this.reservedSpaceForRBW = v.getReservedForRbw();
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this.reservedSpaceForReplicas = v.getReservedForReplicas();
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}
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}
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@ -2596,7 +2597,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
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innerInfo.put("usedSpace", v.usedSpace);
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innerInfo.put("freeSpace", v.freeSpace);
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innerInfo.put("reservedSpace", v.reservedSpace);
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innerInfo.put("reservedSpaceForRBW", v.reservedSpaceForRBW);
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innerInfo.put("reservedSpaceForReplicas", v.reservedSpaceForReplicas);
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info.put(v.directory, innerInfo);
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}
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return info;
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@ -22,8 +22,8 @@ import java.io.File;
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import java.io.FileOutputStream;
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import java.io.FilenameFilter;
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import java.io.IOException;
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import java.nio.channels.ClosedChannelException;
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import java.io.OutputStreamWriter;
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import java.nio.channels.ClosedChannelException;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.nio.file.StandardCopyOption;
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@ -40,9 +40,6 @@ import java.util.concurrent.ThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicLong;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.Joiner;
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import com.google.common.base.Preconditions;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.DF;
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@ -54,21 +51,24 @@ import org.apache.hadoop.hdfs.protocol.BlockListAsLongs;
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import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
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import org.apache.hadoop.hdfs.server.datanode.DataStorage;
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import org.apache.hadoop.hdfs.server.datanode.DatanodeUtil;
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import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeReference;
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import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi;
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import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeReference;
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import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi;
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import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;
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import org.apache.hadoop.util.CloseableReferenceCount;
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import org.apache.hadoop.io.IOUtils;
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import org.apache.hadoop.util.CloseableReferenceCount;
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import org.apache.hadoop.util.DiskChecker.DiskErrorException;
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import com.google.common.util.concurrent.ThreadFactoryBuilder;
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import org.apache.hadoop.util.Time;
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import org.codehaus.jackson.annotate.JsonProperty;
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import org.codehaus.jackson.map.ObjectMapper;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.Joiner;
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import com.google.common.base.Preconditions;
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import com.google.common.util.concurrent.ThreadFactoryBuilder;
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/**
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* The underlying volume used to store replica.
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*
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@ -90,8 +90,9 @@ public class FsVolumeImpl implements FsVolumeSpi {
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private final long reserved;
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private CloseableReferenceCount reference = new CloseableReferenceCount();
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// Disk space reserved for open blocks.
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private AtomicLong reservedForRbw;
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// Disk space reserved for blocks (RBW or Re-replicating) open for write.
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private AtomicLong reservedForReplicas;
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private long recentReserved = 0;
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// Capacity configured. This is useful when we want to
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// limit the visible capacity for tests. If negative, then we just
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@ -113,7 +114,7 @@ public class FsVolumeImpl implements FsVolumeSpi {
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this.reserved = conf.getLong(
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DFSConfigKeys.DFS_DATANODE_DU_RESERVED_KEY,
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DFSConfigKeys.DFS_DATANODE_DU_RESERVED_DEFAULT);
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this.reservedForRbw = new AtomicLong(0L);
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this.reservedForReplicas = new AtomicLong(0L);
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this.currentDir = currentDir;
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File parent = currentDir.getParentFile();
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this.usage = new DF(parent, conf);
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@ -353,8 +354,9 @@ public class FsVolumeImpl implements FsVolumeSpi {
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*/
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@Override
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public long getAvailable() throws IOException {
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long remaining = getCapacity() - getDfsUsed() - reservedForRbw.get();
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long available = usage.getAvailable() - reserved - reservedForRbw.get();
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long remaining = getCapacity() - getDfsUsed() - reservedForReplicas.get();
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long available = usage.getAvailable() - reserved
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- reservedForReplicas.get();
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if (remaining > available) {
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remaining = available;
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}
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@ -362,8 +364,13 @@ public class FsVolumeImpl implements FsVolumeSpi {
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}
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@VisibleForTesting
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public long getReservedForRbw() {
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return reservedForRbw.get();
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public long getReservedForReplicas() {
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return reservedForReplicas.get();
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}
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@VisibleForTesting
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long getRecentReserved() {
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return recentReserved;
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}
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long getReserved(){
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@ -412,13 +419,20 @@ public class FsVolumeImpl implements FsVolumeSpi {
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*/
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File createTmpFile(String bpid, Block b) throws IOException {
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checkReference();
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return getBlockPoolSlice(bpid).createTmpFile(b);
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reserveSpaceForReplica(b.getNumBytes());
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try {
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return getBlockPoolSlice(bpid).createTmpFile(b);
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} catch (IOException exception) {
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releaseReservedSpace(b.getNumBytes());
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throw exception;
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}
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}
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@Override
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public void reserveSpaceForRbw(long bytesToReserve) {
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public void reserveSpaceForReplica(long bytesToReserve) {
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if (bytesToReserve != 0) {
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reservedForRbw.addAndGet(bytesToReserve);
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reservedForReplicas.addAndGet(bytesToReserve);
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recentReserved = bytesToReserve;
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}
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}
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@ -428,14 +442,15 @@ public class FsVolumeImpl implements FsVolumeSpi {
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long oldReservation, newReservation;
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do {
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oldReservation = reservedForRbw.get();
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oldReservation = reservedForReplicas.get();
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newReservation = oldReservation - bytesToRelease;
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if (newReservation < 0) {
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// Failsafe, this should never occur in practice, but if it does we don't
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// want to start advertising more space than we have available.
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// Failsafe, this should never occur in practice, but if it does we
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// don't want to start advertising more space than we have available.
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newReservation = 0;
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}
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} while (!reservedForRbw.compareAndSet(oldReservation, newReservation));
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} while (!reservedForReplicas.compareAndSet(oldReservation,
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newReservation));
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}
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}
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@ -779,7 +794,7 @@ public class FsVolumeImpl implements FsVolumeSpi {
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*/
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File createRbwFile(String bpid, Block b) throws IOException {
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checkReference();
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reserveSpaceForRbw(b.getNumBytes());
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reserveSpaceForReplica(b.getNumBytes());
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try {
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return getBlockPoolSlice(bpid).createRbwFile(b);
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} catch (IOException exception) {
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@ -790,16 +805,15 @@ public class FsVolumeImpl implements FsVolumeSpi {
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/**
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*
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* @param bytesReservedForRbw Space that was reserved during
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* @param bytesReserved Space that was reserved during
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* block creation. Now that the block is being finalized we
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* can free up this space.
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* @return
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* @throws IOException
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*/
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File addFinalizedBlock(String bpid, Block b,
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File f, long bytesReservedForRbw)
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File addFinalizedBlock(String bpid, Block b, File f, long bytesReserved)
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throws IOException {
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releaseReservedSpace(bytesReservedForRbw);
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releaseReservedSpace(bytesReserved);
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return getBlockPoolSlice(bpid).addFinalizedBlock(b, f);
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}
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@ -492,7 +492,7 @@ public class SimulatedFSDataset implements FsDatasetSpi<FsVolumeSpi> {
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}
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@Override
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public void reserveSpaceForRbw(long bytesToReserve) {
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public void reserveSpaceForReplica(long bytesToReserve) {
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}
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@Override
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@ -612,7 +612,7 @@ public class TestDirectoryScanner {
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}
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@Override
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public void reserveSpaceForRbw(long bytesToReserve) {
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public void reserveSpaceForReplica(long bytesToReserve) {
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}
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@Override
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@ -74,7 +74,7 @@ public class ExternalVolumeImpl implements FsVolumeSpi {
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}
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@Override
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public void reserveSpaceForRbw(long bytesToReserve) {
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public void reserveSpaceForReplica(long bytesToReserve) {
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}
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@Override
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@ -28,8 +28,10 @@ import static org.apache.hadoop.hdfs.DFSConfigKeys.*;
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import static org.hamcrest.core.Is.is;
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import static org.junit.Assert.assertThat;
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import static org.junit.Assert.assertTrue;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.fail;
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import org.apache.hadoop.fs.BlockLocation;
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import org.apache.hadoop.fs.FSDataOutputStream;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.hdfs.*;
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@ -60,10 +62,10 @@ import javax.management.ObjectName;
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/**
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* Ensure that the DN reserves disk space equivalent to a full block for
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* replica being written (RBW).
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* replica being written (RBW) & Replica being copied from another DN.
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*/
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public class TestRbwSpaceReservation {
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static final Log LOG = LogFactory.getLog(TestRbwSpaceReservation.class);
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public class TestSpaceReservation {
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static final Log LOG = LogFactory.getLog(TestSpaceReservation.class);
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private static final int DU_REFRESH_INTERVAL_MSEC = 500;
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private static final int STORAGES_PER_DATANODE = 1;
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@ -165,14 +167,14 @@ public class TestRbwSpaceReservation {
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int bytesWritten = buffer.length;
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// Check that space was reserved for a full block minus the bytesWritten.
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assertThat(singletonVolume.getReservedForRbw(),
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assertThat(singletonVolume.getReservedForReplicas(),
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is((long) fileBlockSize - bytesWritten));
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out.close();
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out = null;
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// Check that the reserved space has been released since we closed the
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// file.
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assertThat(singletonVolume.getReservedForRbw(), is(0L));
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assertThat(singletonVolume.getReservedForReplicas(), is(0L));
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// Reopen the file for appends and write 1 more byte.
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out = fs.append(path);
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@ -182,7 +184,7 @@ public class TestRbwSpaceReservation {
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// Check that space was again reserved for a full block minus the
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// bytesWritten so far.
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assertThat(singletonVolume.getReservedForRbw(),
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assertThat(singletonVolume.getReservedForReplicas(),
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is((long) fileBlockSize - bytesWritten));
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// Write once again and again verify the available space. This ensures
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@ -191,7 +193,7 @@ public class TestRbwSpaceReservation {
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out.write(buffer);
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out.hsync();
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bytesWritten += buffer.length;
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assertThat(singletonVolume.getReservedForRbw(),
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assertThat(singletonVolume.getReservedForReplicas(),
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is((long) fileBlockSize - bytesWritten));
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} finally {
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if (out != null) {
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@ -282,7 +284,7 @@ public class TestRbwSpaceReservation {
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GenericTestUtils.waitFor(new Supplier<Boolean>() {
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@Override
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public Boolean get() {
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return (volume.getReservedForRbw() == 0);
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return (volume.getReservedForReplicas() == 0);
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}
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}, 500, Integer.MAX_VALUE); // Wait until the test times out.
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}
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@ -324,12 +326,30 @@ public class TestRbwSpaceReservation {
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}
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// Ensure RBW space reserved is released
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assertTrue("Expected ZERO but got " + fsVolumeImpl.getReservedForRbw(),
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fsVolumeImpl.getReservedForRbw() == 0);
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assertTrue(
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"Expected ZERO but got " + fsVolumeImpl.getReservedForReplicas(),
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fsVolumeImpl.getReservedForReplicas() == 0);
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// Reserve some bytes to verify double clearing space should't happen
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fsVolumeImpl.reserveSpaceForReplica(1000);
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try {
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// Write 1 byte to the file
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FSDataOutputStream os = fs.create(new Path("/" + methodName + ".02.dat"),
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replication);
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os.write(new byte[1]);
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os.hsync();
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os.close();
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fail("Expecting IOException file creation failure");
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} catch (IOException e) {
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// Exception can be ignored (expected)
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}
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// Ensure RBW space reserved is released only once
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assertTrue(fsVolumeImpl.getReservedForReplicas() == 1000);
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}
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@Test(timeout = 30000)
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public void testRBWInJMXBean() throws Exception {
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public void testReservedSpaceInJMXBean() throws Exception {
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final short replication = 1;
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startCluster(BLOCK_SIZE, replication, -1);
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@ -348,7 +368,111 @@ public class TestRbwSpaceReservation {
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final String volumeInfo = (String) mbs.getAttribute(mxbeanName,
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"VolumeInfo");
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assertTrue(volumeInfo.contains("reservedSpaceForRBW"));
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// verify reserved space for Replicas in JMX bean volume info
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assertTrue(volumeInfo.contains("reservedSpaceForReplicas"));
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}
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}
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@Test(timeout = 300000)
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public void testTmpSpaceReserve() throws Exception {
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final short replication = 2;
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startCluster(BLOCK_SIZE, replication, -1);
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final int byteCount1 = 100;
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final int byteCount2 = 200;
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final String methodName = GenericTestUtils.getMethodName();
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// Test positive scenario
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{
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final Path file = new Path("/" + methodName + ".01.dat");
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try (FSDataOutputStream os = fs.create(file, (short) 1)) {
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// Write test data to the file
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os.write(new byte[byteCount1]);
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os.hsync();
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}
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BlockLocation[] blockLocations = fs.getFileBlockLocations(file, 0, 10);
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String firstReplicaNode = blockLocations[0].getNames()[0];
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int newReplicaDNIndex = 0;
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if (firstReplicaNode.equals(cluster.getDataNodes().get(0)
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.getDisplayName())) {
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newReplicaDNIndex = 1;
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}
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FsVolumeImpl fsVolumeImpl = (FsVolumeImpl) cluster.getDataNodes()
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.get(newReplicaDNIndex).getFSDataset().getFsVolumeReferences().get(0);
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performReReplication(file, true);
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|
||||
assertEquals("Wrong reserve space for Tmp ", byteCount1,
|
||||
fsVolumeImpl.getRecentReserved());
|
||||
|
||||
assertEquals("Reserved Tmp space is not released", 0,
|
||||
fsVolumeImpl.getReservedForReplicas());
|
||||
}
|
||||
|
||||
// Test when file creation fails
|
||||
{
|
||||
final Path file = new Path("/" + methodName + ".01.dat");
|
||||
|
||||
try (FSDataOutputStream os = fs.create(file, (short) 1)) {
|
||||
// Write test data to the file
|
||||
os.write(new byte[byteCount2]);
|
||||
os.hsync();
|
||||
}
|
||||
|
||||
BlockLocation[] blockLocations = fs.getFileBlockLocations(file, 0, 10);
|
||||
String firstReplicaNode = blockLocations[0].getNames()[0];
|
||||
|
||||
int newReplicaDNIndex = 0;
|
||||
if (firstReplicaNode.equals(cluster.getDataNodes().get(0)
|
||||
.getDisplayName())) {
|
||||
newReplicaDNIndex = 1;
|
||||
}
|
||||
|
||||
BlockPoolSlice blockPoolSlice = Mockito.mock(BlockPoolSlice.class);
|
||||
Mockito.when(blockPoolSlice.createTmpFile((Block) Mockito.any()))
|
||||
.thenThrow(new IOException("Synthetic IO Exception Throgh MOCK"));
|
||||
|
||||
final FsVolumeImpl fsVolumeImpl = (FsVolumeImpl) cluster.getDataNodes()
|
||||
.get(newReplicaDNIndex).getFSDataset().getFsVolumeReferences().get(0);
|
||||
|
||||
// Reserve some bytes to verify double clearing space should't happen
|
||||
fsVolumeImpl.reserveSpaceForReplica(1000);
|
||||
|
||||
Field field = FsVolumeImpl.class.getDeclaredField("bpSlices");
|
||||
field.setAccessible(true);
|
||||
@SuppressWarnings("unchecked")
|
||||
Map<String, BlockPoolSlice> bpSlices = (Map<String, BlockPoolSlice>) field
|
||||
.get(fsVolumeImpl);
|
||||
bpSlices.put(fsVolumeImpl.getBlockPoolList()[0], blockPoolSlice);
|
||||
|
||||
performReReplication(file, false);
|
||||
|
||||
assertEquals("Wrong reserve space for Tmp ", byteCount2,
|
||||
fsVolumeImpl.getRecentReserved());
|
||||
|
||||
assertEquals("Tmp space is not released OR released twice", 1000,
|
||||
fsVolumeImpl.getReservedForReplicas());
|
||||
}
|
||||
}
|
||||
|
||||
private void performReReplication(Path filePath, boolean waitForSuccess)
|
||||
throws Exception {
|
||||
fs.setReplication(filePath, (short) 2);
|
||||
|
||||
Thread.sleep(4000);
|
||||
BlockLocation[] blockLocations = fs.getFileBlockLocations(filePath, 0, 10);
|
||||
|
||||
if (waitForSuccess) {
|
||||
// Wait for the re replication
|
||||
while (blockLocations[0].getNames().length < 2) {
|
||||
Thread.sleep(2000);
|
||||
blockLocations = fs.getFileBlockLocations(filePath, 0, 10);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -387,7 +511,7 @@ public class TestRbwSpaceReservation {
|
|||
" files and hit " + numFailures + " failures");
|
||||
|
||||
// Check no space was leaked.
|
||||
assertThat(singletonVolume.getReservedForRbw(), is(0L));
|
||||
assertThat(singletonVolume.getReservedForReplicas(), is(0L));
|
||||
}
|
||||
|
||||
private static class Writer extends Daemon {
|
||||
Loading…
Reference in New Issue