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Posted to issues@hbase.apache.org by "Ted Yu (Updated) (JIRA)" <ji...@apache.org> on 2011/10/02 16:44:34 UTC
[jira] [Updated] (HBASE-4529) Make WAL Pluggable
[ https://issues.apache.org/jira/browse/HBASE-4529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ted Yu updated HBASE-4529:
--------------------------
Description:
Make WAL a pluggable, configurable component, thus making it easier to write to different filesystems (including multiple filesystems).
>From Stack:
Pluggable WAL component would need to check that the split can deal w/
multiple logs written by the one server concurrently (sort by sequence
edit id after sorting on all the rest that makes up a wal log key).
>From Jesse Yates:
It would be nice to be able to tie pluggable WAL component into a service that logs directly to
disk, rather than go through HDFS giving some potentially awesome speedup at
the cost of having to write a logging service that handles replication, etc.
>From Karthik Tunga:
Along with the log replaying part, logic is also needed for log roll.
This, I think, is easier compared to the merging of the logs. Any edits less
than the last sequence number on the file system can be removed from all
the WALs.
was:Make WAL a pluggable Component. Thus making it easier to configure to write to different filesystem and even multiple filesystems.
> Make WAL Pluggable
> -------------------
>
> Key: HBASE-4529
> URL: https://issues.apache.org/jira/browse/HBASE-4529
> Project: HBase
> Issue Type: Improvement
> Components: regionserver, wal
> Reporter: Akash Ashok
> Labels: regionserver, wal
>
> Make WAL a pluggable, configurable component, thus making it easier to write to different filesystems (including multiple filesystems).
> From Stack:
> Pluggable WAL component would need to check that the split can deal w/
> multiple logs written by the one server concurrently (sort by sequence
> edit id after sorting on all the rest that makes up a wal log key).
> From Jesse Yates:
> It would be nice to be able to tie pluggable WAL component into a service that logs directly to
> disk, rather than go through HDFS giving some potentially awesome speedup at
> the cost of having to write a logging service that handles replication, etc.
> From Karthik Tunga:
> Along with the log replaying part, logic is also needed for log roll.
> This, I think, is easier compared to the merging of the logs. Any edits less
> than the last sequence number on the file system can be removed from all
> the WALs.
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