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https://issues.apache.org/jira/browse/HBASE-5604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl updated HBASE-5604:
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Description:
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.
was:
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 life table.
> 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
>
> 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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