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HBASE-3514 Speedup HFile.Writer append 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1074001 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Ryan Rawson 2011-02-24 00:59:11 +00:00
parent 8811bed468
commit 501afa4ffb
2 changed files with 32 additions and 31 deletions
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1
CHANGES.txt
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@ -51,6 +51,7 @@ Release 0.91.0 - Unreleased
unflushable regions.
HBASE-3550 FilterList reports false positives (Bill Graham via Andrew
Purtell)
HBASE-3514 Speedup HFile.Writer append
IMPROVEMENTS
HBASE-3290 Max Compaction Size (Nicolas Spiegelberg via Stack)

60
src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
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@ -221,9 +221,6 @@ public class HFile {
// Used to ensure we write in order.
private final RawComparator<byte []> comparator;
// A stream made per block written.
private DataOutputStream out;
// Number of uncompressed bytes per block. Reinitialized when we start
// new block.
private int blocksize;
@ -264,9 +261,9 @@ public class HFile {
// Block cache to optionally fill on write
private BlockCache blockCache;
// Additional byte array output stream used to fill block cache
private ByteArrayOutputStream baos;
private DataOutputStream baosDos;
// Byte array output stream made per block written.
private ByteArrayOutputStream baos = null;
private DataOutputStream baosDos = null;
private int blockNumber = 0;
/**
@ -360,7 +357,7 @@ public class HFile {
* @throws IOException
*/
private void checkBlockBoundary() throws IOException {
if (this.out != null && this.out.size() < blocksize) return;
if (baosDos != null && baosDos.size() < blocksize) return;
finishBlock();
newBlock();
}
@ -370,11 +367,18 @@ public class HFile {
* @throws IOException
*/
private void finishBlock() throws IOException {
if (this.out == null) return;
if (baosDos == null) return;
// Flush Data Output Stream
baosDos.flush();
// Compress Data and write to output stream
DataOutputStream compressStream = getCompressingStream();
baos.writeTo(compressStream);
int size = releaseCompressingStream(compressStream);
long now = System.currentTimeMillis();
int size = releaseCompressingStream(this.out);
this.out = null;
blockKeys.add(firstKey);
blockOffsets.add(Long.valueOf(blockBegin));
blockDataSizes.add(Integer.valueOf(size));
@ -384,14 +388,17 @@ public class HFile {
writeOps++;
if (blockCache != null) {
baosDos.flush();
byte [] bytes = baos.toByteArray();
ByteBuffer blockToCache = ByteBuffer.wrap(bytes, DATABLOCKMAGIC.length,
bytes.length - DATABLOCKMAGIC.length);
String blockName = path.toString() + blockNumber;
blockCache.cacheBlock(blockName, blockToCache);
baosDos.close();
}
baosDos.close();
baosDos = null;
baos = null;
blockNumber++;
}
@ -402,14 +409,14 @@ public class HFile {
private void newBlock() throws IOException {
// This is where the next block begins.
blockBegin = outputStream.getPos();
this.out = getCompressingStream();
this.out.write(DATABLOCKMAGIC);
firstKey = null;
if (blockCache != null) {
this.baos = new ByteArrayOutputStream();
this.baosDos = new DataOutputStream(baos);
this.baosDos.write(DATABLOCKMAGIC);
}
// to avoid too many calls to realloc(),
// pre-allocates the byte stream to the block size + 25%
baos = new ByteArrayOutputStream(blocksize + (int)(blocksize * 0.25));
baosDos = new DataOutputStream(baos);
baosDos.write(DATABLOCKMAGIC);
}
/*
@ -563,12 +570,12 @@ public class HFile {
checkBlockBoundary();
}
// Write length of key and value and then actual key and value bytes.
this.out.writeInt(klength);
this.baosDos.writeInt(klength);
this.keylength += klength;
this.out.writeInt(vlength);
this.baosDos.writeInt(vlength);
this.valuelength += vlength;
this.out.write(key, koffset, klength);
this.out.write(value, voffset, vlength);
this.baosDos.write(key, koffset, klength);
this.baosDos.write(value, voffset, vlength);
// Are we the first key in this block?
if (this.firstKey == null) {
// Copy the key.
@ -579,13 +586,6 @@ public class HFile {
this.lastKeyOffset = koffset;
this.lastKeyLength = klength;
this.entryCount ++;
// If we are pre-caching blocks on write, fill byte array stream
if (blockCache != null) {
this.baosDos.writeInt(klength);
this.baosDos.writeInt(vlength);
this.baosDos.write(key, koffset, klength);
this.baosDos.write(value, voffset, vlength);
}
}
/*