[jira] [Reopened] (ACCUMULO-4066) Conditional mutation processing performance could be improved.

["Keith Turner (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ACCUMULO-4066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Keith Turner reopened ACCUMULO-4066:
------------------------------------

Reopened to add some test for IteratorUtil

> Conditional mutation processing performance could be improved.
> --------------------------------------------------------------
>
>                 Key: ACCUMULO-4066
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4066
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: tserver
>    Affects Versions: 1.6.4, 1.7.0
>            Reporter: Keith Turner
>            Assignee: Keith Turner
>             Fix For: 1.6.5, 1.7.1, 1.8.0
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> When processing conditional mutations tablets reads are done.   The way the current implementation does tablet reads has a lot of overhead.   For each condition the following is done :
>  * Opens and reserves iterators files.
>  * Parse table iterators from table config (involves scanning and filtering entire table config)
>  * Merges condition iterators and table iterators
>  * Constructs iterator stack.
> I created a branch where these operations (except for constructing iterator stack) are done per tablet and/or per batch of conditional mutations.   Doing this I am seeing a 3x speed up in conditional mutation processing rates when data is cached.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)