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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2016/05/24 15:57:13 UTC

[jira] [Updated] (HIVE-10155) LLAP: switch to sensible cache policy

     [ https://issues.apache.org/jira/browse/HIVE-10155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesus Camacho Rodriguez updated HIVE-10155:
-------------------------------------------
    Target Version/s:   (was: 2.1.0)

> LLAP: switch to sensible cache policy
> -------------------------------------
>
>                 Key: HIVE-10155
>                 URL: https://issues.apache.org/jira/browse/HIVE-10155
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>
> FIFO policy is currently the default. We can test LRFU one but there were concerns that it won't scale. One option is to implement a two-tier policy, FIFO/LRU for blocks referenced once, and something more complex (LFU, LRFU) for blocks referenced more than once. That should be friendly to large scans of a fact table in terms of behavior and overhead.



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