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https://issues.apache.org/jira/browse/HBASE-5954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13503321#comment-13503321
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Lars Hofhansl commented on HBASE-5954:
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While I'm add it, I'd like to add deferred log flush as a per operation option
as well.
So we'd have:
# No WAL update (for the existing option to disable writing to the WAL)
# deferred log flush
# flush WAL (default)
# sync WAL
If there are multiple mutations in a batch the highest option will be used for
the entire batch.
Since these options cannot be combined in a sensible way. This is best
represented by an enum.
In 0.96, we can break wire compatibility. I'll just add a protobuf enum, and
remove the current writeToWal bit. The actual logic will be put in the hadoop-2
shim module.
In 0.94 this is a bit more tricky. Both in terms of doing this in a wire
compatible way and in terms of being forced to use reflection to detect and use
Hadoop-2 vs Hadoop-1. Leaning towards only doing this in 0.96, even though I
really wanted this in 0.94.
Comments?
> Allow proper fsync support for HBase
> ------------------------------------
>
> Key: HBASE-5954
> URL: https://issues.apache.org/jira/browse/HBASE-5954
> Project: HBase
> Issue Type: Improvement
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Attachments: 5954-trunk-hdfs-trunk.txt, 5954-trunk-hdfs-trunk-v2.txt,
> 5954-trunk-hdfs-trunk-v3.txt, 5954-trunk-hdfs-trunk-v4.txt,
> 5954-trunk-hdfs-trunk-v5.txt, 5954-trunk-hdfs-trunk-v6.txt, hbase-hdfs-744.txt
>
>
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