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From Andrew Purtell <apurt...@apache.org>
Subject Re: brief note on 1015 (was Re: [jira] Commented: (HBASE-1816) Master rewrite)
Date Wed, 18 Nov 2009 15:43:39 GMT
Glad to see the change to keeping online regions in zk also. See the tail of HBASE-1015. C/C++
client does not want to talk to the master now that we have zk. 

On a related note I looked at avro trunk and its C language binding is NOT ready. We may have
no better option than thrift depending on how long this should wait.

    - Andy

On Tue Nov 17th, 2009 3:44 PM PST stack (JIRA) wrote:

>    [ https://issues.apache.org/jira/browse/HBASE-1816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779207#action_12779207
>stack commented on HBASE-1816:
>More work on design: http://wiki.apache.org/hadoop/Hbase/MasterRewrite.  At Patrick Hunt's
prompting, will have a znode per table up in zk to hold schema and state (rather than one
znode to hold all).  Also, carried forward Patrick's suggestion for how to keep region state.
 It involves a flip on previous notion where online regions were in .META. somehow and zk
just managed unassigned to open.  Instead, .META. lists all regions.  zk holds moving regions
from unassigned -- i.e. mentioned in .META. but not in zk -- through to online (online is
a state in zk).
>> Master rewrite
>> --------------
>>                 Key: HBASE-1816
>>                 URL: https://issues.apache.org/jira/browse/HBASE-1816
>>             Project: Hadoop HBase
>>          Issue Type: Task
>>          Components: master
>>            Reporter: stack
>>            Assignee: stack
>>            Priority: Blocker
>>             Fix For: 0.21.0
>>         Attachments: HBase Hackathon Notes - Sunday.pdf, master-v2.patch, master-v3.patch,
master-v4.patch, master.patch, meta-cleanup.patch
>> An umbrella issue for master rewrite.  Master rewrite is a new feature for 0.21 hbase.
 I'm attaching "Master Rewrite" notes taken at the SU SF hbase meetup made by JGray.
>This message is automatically generated by JIRA.
>You can reply to this email to add a comment to the issue online.


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