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https://issues.apache.org/jira/browse/HBASE-8288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13625168#comment-13625168
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Himanshu Vashishtha commented on HBASE-8288:
--------------------------------------------
Some numbers.
With out patch:
{code}
Target Throughput Threads Workload Operation Number of
Operations Average Throughput Average Latency Average MinLatency
Average MaxLatency Average 95thPercentileLatency Average
99thPercentileLatency
120000 240 randomWrite INSERT 36000000 102970 1875 7
28260540 0 0
140000 280 randomWrite INSERT 42000000 97722 2376 7
38097746 0 0
180000 360 randomWrite INSERT 54000000 85490 3541 7
49078551 0 0
{code}
With patch:
{code}
Target Throughput Threads Workload Operation Number of
Operations Average Throughput Average Latency Average MinLatency
Average MaxLatency Average 95thPercentileLatency Average
99thPercentileLatency
120000 240 randomWrite INSERT 36000000 104425 1835 7
27400334 0 0
140000 280 randomWrite INSERT 42000000 100603 2286 7
31676418 0 0
180000 360 randomWrite INSERT 54000000 88809 3338 7
47636500 0 0
{code}
> HBaseFileSystem: Refactoring and correct semantics for createPath methods
> -------------------------------------------------------------------------
>
> Key: HBASE-8288
> URL: https://issues.apache.org/jira/browse/HBASE-8288
> Project: HBase
> Issue Type: Bug
> Components: Filesystem Integration
> Affects Versions: 0.94.6
> Reporter: Himanshu Vashishtha
> Assignee: Himanshu Vashishtha
> Fix For: 0.94.7
>
> Attachments: HBase-8288-v1.patch
>
>
> This jira is for two issues I see in the HBaseFileSystem class:
> 1) Load testing on a 7 node cluster using ycsb insert workload shows that
> static initialization of conf properties results in a slightly better
> throughput. Though the initialization uses HBaseConfiguration.create() call
> which is expensive (and I tried to avoid that in its first version), this
> class is used for most of the filesystem class, and had to invoke an
> additional checkAndSetXX call before making the fs call because it is not
> certain whether the retry properties are set or not. Having initialize them
> in static block removes that limitation.
> 2) Correct semantics for CreatePathXXX method. In case the overwrite flag is
> false and file already exists, underlying fs throws an exception. It should
> be re-thrown to the caller.
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