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From "Keith Turner (JIRA)" <>
Subject [jira] [Resolved] (ACCUMULO-1859) Conditional Mutation with 1000 conditions is slow.
Date Wed, 13 Nov 2013 23:53:22 GMT


Keith Turner resolved ACCUMULO-1859.

    Resolution: Fixed

> Conditional Mutation with 1000 conditions is slow.
> --------------------------------------------------
>                 Key: ACCUMULO-1859
>                 URL:
>             Project: Accumulo
>          Issue Type: Bug
>          Components: client, tserver
>            Reporter: Keith Turner
>            Assignee: Keith Turner
>            Priority: Critical
>             Fix For: 1.6.0
>         Attachments: 0001-ACCUMULO-1859-experimental.patch, 0002-ACCUMULO-1859-experimental.patch,
> The random walk test for conditional mutations creates a conditional mutation  with 1000
conditions.  I noticed this was really slow.   
> I did some further testing using MiniAccumulo and was seeing times around 1300ms to 1400ms
for this operation (the conditions all checked for absence and all data for the tablet was
in memory).
> I traced the problem down to parsing the iterator config.  Iterating over the table config,
filtering non iterator props, and parsing was taking a little more than a 1ms.  I modifed
TableConfiguration to cache the iterator props and saw my test times drop to 120ms to 130ms.

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