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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6055) Snapshots in HBase 0.96
Date Tue, 12 Jun 2012 09:52:45 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13293482#comment-13293482

Lars Hofhansl commented on HBASE-6055:

Let's try to avoid going overboard here.
In principle snapshot and backup/restore are different and independent.

A snapshot generates a consistent snapshot of the data that can subsequently be copied conveniently
somewhere else - thus creating a backup.

Ideally we would not even prescribe the backup/restore semantics here, but just provide missing
building blocks.

Just my $0.02.

Another thought here is: In principle an HFile resulting from a major compaction could be
considered a baseline copy and additional HFiles would be incremental changes on top of that
baseline. It might be worth considering if we can make use of this ability of HBase to overlay
changes from many sources into a single view of the data (would probably be tricky as regions
are flushed in sync, etc, just waving hands here).

> Snapshots in HBase 0.96
> -----------------------
>                 Key: HBASE-6055
>                 URL: https://issues.apache.org/jira/browse/HBASE-6055
>             Project: HBase
>          Issue Type: New Feature
>          Components: client, master, regionserver, zookeeper
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>             Fix For: 0.96.0
>         Attachments: Snapshots in HBase.docx
> Continuation of HBASE-50 for the current trunk. Since the implementation has drastically
changed, opening as a new ticket.

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