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https://issues.apache.org/jira/browse/HBASE-20710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16521367#comment-16521367
]
stack commented on HBASE-20710:
-------------------------------
Pushed a checkstyle addendum to branch-2.0+
commit 959d9c16f305fbed0298e6da4fab43f4c1a5e478 (HEAD -> m, origin/master,
origin/HEAD)
Author: Michael Stack <[email protected]>
Date: Sat Jun 23 20:41:47 2018 -0700
HBASE-20710 extra cloneFamily() in Mutation.add(Cell); ADDENDUM checkstyle
diff --git
a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java
b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java
index 3d935011dd..dc8199df72 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java
@@ -115,10 +115,10 @@ public abstract class Mutation extends
OperationWithAttributes implements Row, C
super(clone);
this.row = clone.getRow();
this.ts = clone.getTimestamp();
- this.familyMap = clone.getFamilyCellMap().entrySet().stream()
- .collect(Collectors.toMap(e -> e.getKey(), e -> new
ArrayList<>(e.getValue()), (k, v) -> {
- throw new RuntimeException("collisions!!!");
- }, () -> new TreeMap<>(Bytes.BYTES_COMPARATOR)));
+ this.familyMap = clone.getFamilyCellMap().entrySet().stream().
+ collect(Collectors.toMap(e -> e.getKey(), e -> new
ArrayList<>(e.getValue()), (k, v) -> {
+ throw new RuntimeException("collisions!!!");
+ }, () -> new TreeMap<>(Bytes.BYTES_COMPARATOR)));
}
> extra cloneFamily() in Mutation.add(Cell)
> -----------------------------------------
>
> Key: HBASE-20710
> URL: https://issues.apache.org/jira/browse/HBASE-20710
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver
> Affects Versions: 2.0.1
> Reporter: huaxiang sun
> Assignee: huaxiang sun
> Priority: Minor
> Fix For: 3.0.0, 2.1.0, 2.0.2
>
> Attachments: 2.0621.2.12782.alloc.svg, 2.0623.111354.alloc.svg,
> HBASE-20710-master-v001.patch, HBASE-20710-master-v002.patch,
> HBASE-20710-master-v002.patch, HBASE-20710.master.001.patch,
> alloc-put-fix.svg, alloc-put-orig.svg
>
>
> The cpu profiling shows that during PE randomWrite testing, about 1 percent
> of time is spent in cloneFamily. Reviewing code found that when a cell is DBB
> backed ByteBuffKeyValueCell (which is default with Netty Rpc),
> cell.getFamilyArray() will call cloneFamily() and there is again a
> cloneFamily() in the following line of the code. since this is the critical
> write path processing, this needs to be optimized.
> https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java#L791
> https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java#L795
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