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Posted to issues@hive.apache.org by "Andrew Sears (JIRA)" <ji...@apache.org> on 2016/12/12 03:45:58 UTC

[jira] [Commented] (HIVE-13029) NVDIMM support for LLAP Cache

    [ https://issues.apache.org/jira/browse/HIVE-13029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15740878#comment-15740878 ] 

Andrew Sears commented on HIVE-13029:
-------------------------------------

Hi [~leftylev]

Added above properties.  There are about 70 or so more LLAP-related properties that need to be added.

> NVDIMM support for LLAP Cache
> -----------------------------
>
>                 Key: HIVE-13029
>                 URL: https://issues.apache.org/jira/browse/HIVE-13029
>             Project: Hive
>          Issue Type: New Feature
>          Components: llap
>    Affects Versions: 2.1.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Critical
>              Labels: TODOC2.1
>             Fix For: 2.1.0
>
>         Attachments: HIVE-13029.1.patch, HIVE-13029.2.patch, HIVE-13029.3.patch, HIVE-13029.4.patch
>
>
> LLAP cache has been designed so that the cache can be offloaded easily to a pmem API without restart coherence.
> The tricky part about NVDIMMs are restart coherence, while most of the cache gains can be obtained without keeping state across refreshes, since LLAP is not the system of record, HDFS is.



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