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From "Lars Hofhansl (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5604) HLog replay tool that generates HFiles for use by LoadIncrementalHFiles.
Date Fri, 06 Apr 2012 00:10:23 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl updated HBASE-5604:
---------------------------------

    Attachment: HLog-5604-v2.txt

This is what I have so far. Pretty simple.

It's not finished, and I only sporadically get to work on this.

Did some testing, both playing directly into a table and writing to HFiles worked fine.
I have not tested time based filtering, yet.

Repeat: This is not ready, I just need to store this somewhere :)

                
> HLog replay tool that generates HFiles for use by LoadIncrementalHFiles.
> ------------------------------------------------------------------------
>
>                 Key: HBASE-5604
>                 URL: https://issues.apache.org/jira/browse/HBASE-5604
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Lars Hofhansl
>         Attachments: HLog-5604-v2.txt
>
>
> Just an idea I had. Might be useful for restore of a backup using the HLogs.
> This could an M/R (with a mapper per HLog file).
> The tool would get a timerange and a (set of) table(s). We'd pick the right HLogs based
on time before the M/R job is started and then have a mapper per HLog file.
> The mapper would then go through the HLog, filter all WALEdits that didn't fit into the
time range or are not any of the tables and then uses HFileOutputFormat to generate HFiles.
> Would need to indicate the splits we want, probably from a live table.

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