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From "daniel meng (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-1270) Avoid retrieve metadata from server to gain performance
Date Mon, 22 Sep 2014 05:44:33 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-1270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

daniel meng updated PHOENIX-1270:
---------------------------------
    Attachment: PHOENIX-1270.patch

> Avoid retrieve metadata from server to gain performance
> -------------------------------------------------------
>
>                 Key: PHOENIX-1270
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1270
>             Project: Phoenix
>          Issue Type: Improvement
>    Affects Versions: 3.0.0
>            Reporter: daniel meng
>         Attachments: PHOENIX-1270.patch
>
>
> Now the SELECT or UPSERT(when autoCommit is TRUE) will need one extra RPC for retrieve
metadata from RS. In some cases where metadata rarely changed and higher TPS is required,
we should let the client have a choice to use cache directly for better performance. the attached
patch do two :
> 1. enable metadata cache self refresh (switch by "phoenix.cache.autoRefresh")
> 2. client can use hint /\*+ALWAYS_USE_META_CACHE\*/ to force compiler to use cache frist
> thanks in advance for your advice



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