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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-2038) Coprocessors: Region level indexing
Date Fri, 06 Jan 2012 07:37:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181183#comment-13181183
] 

Lars Hofhansl commented on HBASE-2038:
--------------------------------------

I have no particular use case... Just that I have been trying to work out how I would do 2nd-ary
indexes in HBase and I always came back to this (either it needs some cross region transaction
when maintaining the index, or you need to ask all regions when you query the index).

Not a problem as such. Just confirming.
Such a get could be farmed off in parallel to manu regions, so latency is not necessarily
bad.
I'd be up for an offline chat. I'll send an email.
                
> Coprocessors: Region level indexing
> -----------------------------------
>
>                 Key: HBASE-2038
>                 URL: https://issues.apache.org/jira/browse/HBASE-2038
>             Project: HBase
>          Issue Type: New Feature
>          Components: coprocessors
>            Reporter: Andrew Purtell
>            Priority: Minor
>
> HBASE-2037 is a good candidate to be done as coprocessor. It also serve as a good goalpost
for coprocessor environment design -- there should be enough of it so region level indexing
can be reimplemented as a coprocessor without any loss of functionality. 

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