Return-Path: 
 <hbase-dev-return-14339-apmail-hadoop-hbase-dev-archive=hadoop.apache.org@hadoop.apache.org>
Delivered-To: apmail-hadoop-hbase-dev-archive@minotaur.apache.org
Received: (qmail 35429 invoked from network); 5 Oct 2009 02:20:20 -0000
Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3)
  by minotaur.apache.org with SMTP; 5 Oct 2009 02:20:20 -0000
Received: (qmail 23792 invoked by uid 500); 5 Oct 2009 02:20:20 -0000
Delivered-To: apmail-hadoop-hbase-dev-archive@hadoop.apache.org
Received: (qmail 23733 invoked by uid 500); 5 Oct 2009 02:20:20 -0000
Mailing-List: contact hbase-dev-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:hbase-dev-help@hadoop.apache.org>
List-Unsubscribe: <mailto:hbase-dev-unsubscribe@hadoop.apache.org>
List-Post: <mailto:hbase-dev@hadoop.apache.org>
List-Id: <hbase-dev.hadoop.apache.org>
Reply-To: hbase-dev@hadoop.apache.org
Delivered-To: mailing list hbase-dev@hadoop.apache.org
Received: (qmail 23723 invoked by uid 99); 5 Oct 2009 02:20:20 -0000
Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Oct 2009 02:20:20 +0000
X-ASF-Spam-Status: No, hits=-2000.0 required=10.0
	tests=ALL_TRUSTED
X-Spam-Check-By: apache.org
Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Oct 2009 02:20:17 +0000
Received: from brutus (localhost [127.0.0.1])
	by brutus.apache.org (Postfix) with ESMTP id 3A596234C03A
	for <hbase-dev@hadoop.apache.org>; Sun,  4 Oct 2009 19:19:56 -0700 (PDT)
Message-ID: <124323782.1254709196225.JavaMail.jira@brutus>
Date: Sun, 4 Oct 2009 19:19:56 -0700 (PDT)
From: "Andrew Purtell (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-1886) move table and column family
 attributes to ZK to make them live
In-Reply-To: <2075655813.1254708716220.JavaMail.jira@brutus>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394
X-Virus-Checked: Checked by ClamAV on apache.org


    [ https://issues.apache.org/jira/browse/HBASE-1886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12762068#action_12762068 ] 

Andrew Purtell commented on HBASE-1886:
---------------------------------------

The master copies table and family attributes up to ZK out of the table descriptor during the initial MetaScanner scan and from createTable. Attributes are written back to all descriptors in all regions of the table in META by the Master when shutdown is first initiated. deleteTable causes appropriate deletions.

> move table and column family attributes to ZK to make them live
> ---------------------------------------------------------------
>
>                 Key: HBASE-1886
>                 URL: https://issues.apache.org/jira/browse/HBASE-1886
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>             Fix For: 0.21.0
>
>         Attachments: live_attributes.patch
>
>
> This is a first cut at moving table and column family attributes up to ZK where they can be modified any time without requiring a disable/enable table cycle. Adds methods to ZooKeeperWrapper for support server side. Adds methods to HTableInterface for client side access. Client side talks directly to ZK. 
> The new hierarchy for attributes in ZK is like:
> {noformat}
> /hbase
>   /table
>     /<table-name>
>       /attr
>         /<table-attr-name>
>         /<family-name>
>           /<family-attr-name>
> {noformat}
> As before attribute names and values are byte[], but now that they are hosted in ZK, the path delimiter ('/') cannot be used.
> Attached patch compiles but has not been tested. I put it up for a concept review. Next step before this is functional is to deprecate the attribute related methods on HTD and HCD and chase through the warnings to find all users who should be updated to use the ZK wrapper or new HTable methods instead. And, of course, then add test cases that successfully complete.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.