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From "Zhihong Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5699) Run with > 1 WAL in HRegionServer
Date Mon, 30 Apr 2012 18:17:55 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13265076#comment-13265076
] 

Zhihong Yu commented on HBASE-5699:
-----------------------------------

Playing with a prototype of this feature using ycsb (half insert, half upate) on a 5-node
cluster where usertable has 13 regions on each region server.
Without this feature:
{code}
 10 sec: 99965 operations; 9996.5 current ops/sec; [UPDATE AverageLatency(us)=258.68] [INSERT
AverageLatency(us)=610.28]
 20 sec: 99965 operations; 0 current ops/sec;
 25 sec: 99990 operations; 4.3 current ops/sec; [UPDATE AverageLatency(us)=2594303.62] [INSERT
AverageLatency(us)=1240495.41]
[OVERALL], RunTime(ms), 25844.0
[OVERALL], Throughput(ops/sec), 3868.9831295465096
[UPDATE], Operations, 49935
[UPDATE], AverageLatency(us), 674.2635626314209
{code}
with this feature:
{code}
 10 sec: 99952 operations; 9994.2 current ops/sec; [UPDATE AverageLatency(us)=178.7] [INSERT
AverageLatency(us)=584.76]
 20 sec: 99990 operations; 3.8 current ops/sec; [UPDATE AverageLatency(us)=10.88] [INSERT
AverageLatency(us)=679174.27]
 20 sec: 99990 operations; 0 current ops/sec;
[OVERALL], RunTime(ms), 20867.0
[OVERALL], Throughput(ops/sec), 4791.776489193463
[UPDATE], Operations, 49992
[UPDATE], AverageLatency(us), 178.6439030244839
{code}
                
> Run with > 1 WAL in HRegionServer
> ---------------------------------
>
>                 Key: HBASE-5699
>                 URL: https://issues.apache.org/jira/browse/HBASE-5699
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: binlijin
>            Assignee: Li Pi
>


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