[
https://issues.apache.org/jira/browse/HBASE-4608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227969#comment-13227969
]
stack commented on HBASE-4608:
------------------------------
bq. I think WAL_VERSION metadata is orthogonal to compression type metadata and
I would expect both to be present in new HLog files written with this feature.
How does it get in if you don't add it?
If you don't want to add it, just don't. I'm not going to +1 this patch though
if it adds metadata about a new compression feature w/o introducing a general
versioning on the WAL.
bq. Should the Compression class in wal package ...
The compression class in wal is Compressor.java.
I have trouble following your responses to my comments because they come in w/o
context and are also they are done piecemeal which means I have to spend way
more time than I should have to reviewing your stuff. I'd suggest you save up
your comments and submit them in a lump rather than hit submit per comment;
you'll use up less internet.
> HLog Compression
> ----------------
>
> Key: HBASE-4608
> URL: https://issues.apache.org/jira/browse/HBASE-4608
> Project: HBase
> Issue Type: New Feature
> Reporter: Li Pi
> Assignee: Li Pi
> Fix For: 0.94.0
>
> Attachments: 4608-v19.txt, 4608-v20.txt, 4608-v22.txt, 4608v1.txt,
> 4608v13.txt, 4608v13.txt, 4608v14.txt, 4608v15.txt, 4608v16.txt, 4608v17.txt,
> 4608v18.txt, 4608v5.txt, 4608v6.txt, 4608v7.txt, 4608v8fixed.txt
>
>
> The current bottleneck to HBase write speed is replicating the WAL appends
> across different datanodes. We can speed up this process by compressing the
> HLog. Current plan involves using a dictionary to compress table name, region
> id, cf name, and possibly other bits of repeated data. Also, HLog format may
> be changed in other ways to produce a smaller HLog.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
