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https://issues.apache.org/jira/browse/HBASE-5547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419724#comment-13419724
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Lars Hofhansl commented on HBASE-5547:
--------------------------------------
Ok. On more question I asked just now on RB:
>From Matteo:
{quote}
MasterFileSystem contains deleteRegion() and deleteTable() that calls
fs.delete() with the recursive flag on.
This two methods get called by DeleteTableHandler (drop table).
In a backup/snapshot situation we want to keep the regions/hfiles.
{quote}
My follow up question:
{quote}
I find that deleteRegion() was addressed, but not deleteTable().
That means if a table is dropped the HFiles would be deleted and not
archived.
So it seems we should either:
- also delete the table's archive directory (since it would be
incomplete anyway).
- archive all the HFile before deleting them.
What do you think Jesse?
{quote}
> Don't delete HFiles when in "backup mode"
> -----------------------------------------
>
> Key: HBASE-5547
> URL: https://issues.apache.org/jira/browse/HBASE-5547
> Project: HBase
> Issue Type: New Feature
> Reporter: Lars Hofhansl
> Assignee: Jesse Yates
> Fix For: 0.94.2
>
> Attachments: 5547-v12.txt, 5547-v16.txt, hbase-5447-v8.patch,
> hbase-5447-v8.patch, hbase-5547-v9.patch, java_HBASE-5547_v13.patch,
> java_HBASE-5547_v14.patch, java_HBASE-5547_v15.patch,
> java_HBASE-5547_v4.patch, java_HBASE-5547_v5.patch, java_HBASE-5547_v6.patch,
> java_HBASE-5547_v7.patch
>
>
> This came up in a discussion I had with Stack.
> It would be nice if HBase could be notified that a backup is in progress (via
> a znode for example) and in that case either:
> 1. rename HFiles to be delete to <file>.bck
> 2. rename the HFiles into a special directory
> 3. rename them to a general trash directory (which would not need to be tied
> to backup mode).
> That way it should be able to get a consistent backup based on HFiles (HDFS
> snapshots or hard links would be better options here, but we do not have
> those).
> #1 makes cleanup a bit harder.
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