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Date: Mon, 22 Mar 2010 21:45:27 +0000 (UTC)
From: "Jean-Daniel Cryans (JIRA)" <jira@apache.org>
To: hbase-issues@hadoop.apache.org
Subject: [jira] Updated: (HBASE-2361) WALEdit broke replication scope
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     [ https://issues.apache.org/jira/browse/HBASE-2361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jean-Daniel Cryans updated HBASE-2361:
--------------------------------------

    Attachment: HBASE-2361.patch

This patch implements the third solution. It adds a new list for scopes which by default is set to local. It also optimizes reading the fields so that we only set the size of each list to what's needed.

> WALEdit broke replication scope
> -------------------------------
>
>                 Key: HBASE-2361
>                 URL: https://issues.apache.org/jira/browse/HBASE-2361
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.21.0
>
>         Attachments: HBASE-2361.patch
>
>
> Before HBASE-2283, each KV had a HLogKey with a replication scope. Now a key applies to a list of KVs that spans multiple families so a single scope doesn't work anymore. Multiple possible solutions:
>  - Each KV have their own scope. We already ruled that out in a previous jira since that means the scope would end up in the HFiles.
>  - Store pairs of scope/KV in WALEdit instead of straight KVs.
>  - Have 2 parallel lists in WALEdit, one for KVs and the other for scopes.
>  - Subclass KV and add the scope there, those would be created when inserted in the WAL and would contain the KV stored in the HFiles.
> I'm sure there are other solutions, discuss.

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