hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15921) Add first AsyncTable impl and create TableImpl based on it
Date Fri, 23 Sep 2016 07:39:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15515692#comment-15515692
] 

Duo Zhang commented on HBASE-15921:
-----------------------------------

Yes the 'start from beginning' is only for single request.

For batch operation, I think we should still start from beginning as regions maybe moved and
seems we have an optimization that group requests by RS? But as you said, we need to keep
track of suceeded and ongoing sub tasks to avoid unnecessary resubmition.

For scan, the retry is per rpc call I think. We do not need to reopen a scanner... And for
scan, as now we have heartbeat which makes it different from other operations, we would better
revisit the timeout semantic of it.

Thanks.

> Add first AsyncTable impl and create TableImpl based on it
> ----------------------------------------------------------
>
>                 Key: HBASE-15921
>                 URL: https://issues.apache.org/jira/browse/HBASE-15921
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Jurriaan Mous
>            Assignee: Duo Zhang
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15921-v2.patch, HBASE-15921.demo.patch, HBASE-15921.patch,
HBASE-15921.v1.patch
>
>
> First we create an AsyncTable interface with implementation without the Scan functionality.
Those will land in a separate patch since they need a refactor of existing scans.
> Also added is a new TableImpl to replace HTable. It uses the AsyncTableImpl internally
and should be a bit faster because it does jump through less hoops to do ProtoBuf transportation.
This way we can run all existing tests on the AsyncTableImpl to guarantee its quality.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message