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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-3514) Speedup HFile.Writer append
Date Fri, 11 Mar 2011 07:00:59 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3514?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-3514:
-------------------------

    Status: Patch Available  (was: Reopened)

Marking patch available.  Want to take a looksee at Matteo's latest Ryan?

> Speedup HFile.Writer append
> ---------------------------
>
>                 Key: HBASE-3514
>                 URL: https://issues.apache.org/jira/browse/HBASE-3514
>             Project: HBase
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 0.90.0
>            Reporter: Matteo Bertozzi
>            Priority: Minor
>         Attachments: HBASE-3514-append-0.90-v2.patch, HBASE-3514-append-0.90-v2b.patch,
HBASE-3514-append-0.90-v3.patch, HBASE-3514-append-0.90.patch, HBASE-3514-append-trunk-v2.patch,
HBASE-3514-append-trunk-v2c.patch, HBASE-3514-append-trunk-v3.patch, HBASE-3514-append.patch,
HBASE-3514-metaBlock-bsearch.patch
>
>
> Remove double writes when block cache is specified, by using, only, the ByteArrayDataStream.
> baos is flushed with the compress stream on finishBlock.
> On my machines HFilePerformanceEvaluation SequentialWriteBenchmark passes from 4000ms
to 2500ms.
> Running SequentialWriteBenchmark for 1000000 rows took 4247ms.
> Running SequentialWriteBenchmark for 1000000 rows took 4512ms.
> Running SequentialWriteBenchmark for 1000000 rows took 4498ms.
> Running SequentialWriteBenchmark for 1000000 rows took 2697ms.
> Running SequentialWriteBenchmark for 1000000 rows took 2770ms.
> Running SequentialWriteBenchmark for 1000000 rows took 2721ms.

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