[jira] Commented: (HBASE-1535) Add client ability to perform mutations without the WAL

["Jonathan Gray (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-1535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12720979#action_12720979 ] 

Jonathan Gray commented on HBASE-1535:
--------------------------------------

Wowsa.

{noformat}
Import test, single client.  10 rows, each with 2M columns.  Qualifiers are 8 bytes, values are 256 bytes.

[writeToWAL = true]
Inserted 10 rows each with 2000000 total columns in 792979ms (79297.9ms/row)

[writeToWAL = false]
Inserted 10 rows each with 2000000 total columns in 321308ms (32130.8ms/row)
{noformat}

Over 2X improvement in import speed.

> Add client ability to perform mutations without the WAL
> -------------------------------------------------------
>
>                 Key: HBASE-1535
>                 URL: https://issues.apache.org/jira/browse/HBASE-1535
>             Project: Hadoop HBase
>          Issue Type: New Feature
>    Affects Versions: 0.20.0
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>             Fix For: 0.20.1
>
>         Attachments: HBASE-1535-v1.patch, HBASE-1535-v2.patch
>
>
> There are a number of cases where a client might not want/need its edits to be written into the HLog.  The most obvious use of this would be during a bulk import where we want the best performance possible and data loss is acceptable (can rerun the import).
> Does this become a flag on Put or a special mode of HTable?

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