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HDFS-5323. Remove some deadcode in BlockManager (Colin Patrick McCabe) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1530814 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Colin McCabe 2013-10-09 22:27:27 +00:00
parent a184fceddc
commit b8ae4e2a8e
4 changed files with 8 additions and 14 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -306,6 +306,8 @@ Release 2.3.0 - UNRELEASED
HDFS-4510. Cover classes ClusterJspHelper/NamenodeJspHelper with unit
tests. (Andrey Klochkov via kihwal)
HDFS-5323. Remove some deadcode in BlockManager (Colin Patrick McCabe)
OPTIMIZATIONS
HDFS-5239. Allow FSNamesystem lock fairness to be configurable (daryn)

7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
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@ -75,6 +75,7 @@ import org.apache.hadoop.hdfs.util.LightWeightLinkedSet;
import org.apache.hadoop.net.Node;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.Daemon;
import org.apache.hadoop.util.LightWeightGSet;
import org.apache.hadoop.util.Time;
import com.google.common.annotations.VisibleForTesting;
@ -90,9 +91,6 @@ public class BlockManager {
static final Log LOG = LogFactory.getLog(BlockManager.class);
public static final Log blockLog = NameNode.blockStateChangeLog;
/** Default load factor of map */
public static final float DEFAULT_MAP_LOAD_FACTOR = 0.75f;
private static final String QUEUE_REASON_CORRUPT_STATE =
"it has the wrong state or generation stamp";
@ -244,7 +242,8 @@ public class BlockManager {
invalidateBlocks = new InvalidateBlocks(datanodeManager);
// Compute the map capacity by allocating 2% of total memory
blocksMap = new BlocksMap(DEFAULT_MAP_LOAD_FACTOR);
blocksMap = new BlocksMap(
LightWeightGSet.computeCapacity(2.0, "BlocksMap"));
blockplacement = BlockPlacementPolicy.getInstance(
conf, stats, datanodeManager.getNetworkTopology());
pendingReplications = new PendingReplicationBlocks(conf.getInt(

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlocksMap.java
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@ -57,11 +57,11 @@ class BlocksMap {
/** Constant {@link LightWeightGSet} capacity. */
private final int capacity;
private volatile GSet<Block, BlockInfo> blocks;
private GSet<Block, BlockInfo> blocks;
BlocksMap(final float loadFactor) {
BlocksMap(int capacity) {
// Use 2% of total memory to size the GSet capacity
this.capacity = LightWeightGSet.computeCapacity(2.0, "BlocksMap");
this.capacity = capacity;
this.blocks = new LightWeightGSet<Block, BlockInfo>(capacity);
}

7
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/metrics/TestNameNodeMetrics.java
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@ -192,17 +192,10 @@ public class TestNameNodeMetrics {
assertCounter("CreateFileOps", 1L, rb);
assertCounter("FilesCreated", (long)file.depth(), rb);
// Blocks are stored in a hashmap. Compute its capacity, which
// doubles every time the number of entries reach the threshold.
int threshold = (int)(blockCapacity * BlockManager.DEFAULT_MAP_LOAD_FACTOR);
while (threshold < blockCount) {
blockCapacity <<= 1;
}
long filesTotal = file.depth() + 1; // Add 1 for root
rb = getMetrics(NS_METRICS);
assertGauge("FilesTotal", filesTotal, rb);
assertGauge("BlocksTotal", blockCount, rb);
assertGauge("BlockCapacity", blockCapacity, rb);
fs.delete(file, true);
filesTotal--; // reduce the filecount for deleted file