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HDFS-7433. Optimize performance of DatanodeManager's node map. Contributed by Daryn Sharp.

This commit is contained in:
Kihwal Lee 2015-05-08 15:18:29 -05:00
parent 8f7c2364d7
commit 7a7960be41
2 changed files with 9 additions and 10 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -535,6 +535,9 @@ Release 2.8.0 - UNRELEASED
HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than
DFSOutputStream#writeChunk (cmccabe)
HDFS-7433. Optimize performance of DatanodeManager's node map.
(daryn via kihwal)
BUG FIXES
HDFS-7501. TransactionsSinceLastCheckpoint can be negative on SBNs.

16
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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@ -40,7 +40,6 @@ import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
import org.apache.hadoop.hdfs.server.protocol.*;
import org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock;
import org.apache.hadoop.hdfs.util.CyclicIteration;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.net.*;
import org.apache.hadoop.net.NetworkTopology.InvalidTopologyException;
@ -84,8 +83,8 @@ public class DatanodeManager {
* <p>
* Mapping: StorageID -> DatanodeDescriptor
*/
private final NavigableMap<String, DatanodeDescriptor> datanodeMap
= new TreeMap<String, DatanodeDescriptor>();
private final Map<String, DatanodeDescriptor> datanodeMap
= new HashMap<String, DatanodeDescriptor>();
/** Cluster network topology */
private final NetworkTopology networktopology;
@ -405,11 +404,6 @@ public class DatanodeManager {
}
}
CyclicIteration<String, DatanodeDescriptor> getDatanodeCyclicIteration(
final String firstkey) {
return new CyclicIteration<String, DatanodeDescriptor>(
datanodeMap, firstkey);
}
/** @return the datanode descriptor for the host. */
public DatanodeDescriptor getDatanodeByHost(final String host) {
@ -526,9 +520,10 @@ public class DatanodeManager {
/** Prints information about all datanodes. */
void datanodeDump(final PrintWriter out) {
synchronized (datanodeMap) {
Map<String,DatanodeDescriptor> sortedDatanodeMap =
new TreeMap<String,DatanodeDescriptor>(datanodeMap);
out.println("Metasave: Number of datanodes: " + datanodeMap.size());
for(Iterator<DatanodeDescriptor> it = datanodeMap.values().iterator(); it.hasNext();) {
DatanodeDescriptor node = it.next();
for (DatanodeDescriptor node : sortedDatanodeMap.values()) {
out.println(node.dumpDatanode());
}
}
@ -1289,6 +1284,7 @@ public class DatanodeManager {
foundNodes.add(HostFileManager.resolvedAddressFromDatanodeID(dn));
}
}
Collections.sort(nodes);
if (listDeadNodes) {
for (InetSocketAddress addr : includedNodes) {