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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-9420) LLAP: separate decoding thread from read/uncompress thread
Date Sat, 11 Jul 2015 00:40:04 GMT

     [ https://issues.apache.org/jira/browse/HIVE-9420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Shelukhin updated HIVE-9420:
-----------------------------------
    Attachment: HIVE-9420.WIP.patch

Something like this... need to finish it

> LLAP: separate decoding thread from read/uncompress thread
> ----------------------------------------------------------
>
>                 Key: HIVE-9420
>                 URL: https://issues.apache.org/jira/browse/HIVE-9420
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-9420.WIP.patch
>
>
> Right now reader is a callable that is dumped into threadpool, and all the data loading
for one request happens on one thread (in parallel with operator pipeline).
> We might want to separate reading from HDFS/decompressing data, from decoding data and
low-level row-level SARGs (that, and high level cache which is AWOL now, were the reasons
for encoded data production separation from final VRB production)



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