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