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From "Ferdinand Xu (JIRA)" <>
Subject [jira] [Updated] (HIVE-8136) Reduce table locking
Date Wed, 15 Apr 2015 07:27:58 GMT


Ferdinand Xu updated HIVE-8136:
    Attachment: HIVE-8136.1.patch

As discussed offline with [~brocknoland], for altering location, anyone who is reading has
already gotten the location they are reading from, the new location is irrelevant to them
and it is relevant to writers. [~brocknoland] and [~szehon], could you help me review this
patch and check it in? Thank you!

> Reduce table locking
> --------------------
>                 Key: HIVE-8136
>                 URL:
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Brock Noland
>            Assignee: Ferdinand Xu
>         Attachments: HIVE-8136.1.patch, HIVE-8136.patch
> When using ZK for concurrency control, some statements require an exclusive table lock
when they are atomic. Such as setting a tables location.
> This JIRA is to analyze the scope of statements like ALTER TABLE and see if we can reduce
the locking required.

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