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Posted to notifications@accumulo.apache.org by "John Vines (JIRA)" <ji...@apache.org> on 2014/07/02 16:44:26 UTC

[jira] [Commented] (ACCUMULO-2969) eliminate table watches in clients by using Thrift to find the table map

    [ https://issues.apache.org/jira/browse/ACCUMULO-2969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14049972#comment-14049972 ] 

John Vines commented on ACCUMULO-2969:
--------------------------------------

How do you plan on handling stale table mappings?

> eliminate table watches in clients by using Thrift to find the table map
> ------------------------------------------------------------------------
>
>                 Key: ACCUMULO-2969
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2969
>             Project: Accumulo
>          Issue Type: Sub-task
>          Components: client, master, tserver
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Minor
>
> Presently, table map information is read directly from zookeeper.  This information is pulled using the ZooCache, which adds watches to each table znode, and the name znode.  The shell, in particular, pulls table information to provide table names for tab completion.
> It is surprising that clients have watches on znodes for anything but the root tablet and the master's lock/address.



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