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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2789) Add a system stress test based on key/cell/row size
Date Fri, 23 May 2014 23:28:02 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14007869#comment-14007869
] 

ASF subversion and git services commented on ACCUMULO-2789:
-----------------------------------------------------------

Commit f0dcf1e5570c12098e716ec58ea2f4bc3321053b in accumulo's branch refs/heads/1.6.1-SNAPSHOT
from Bill Slacum
[ https://git-wip-us.apache.org/repos/asf?p=accumulo.git;h=f0dcf1e ]

ACCUMULO-2789 Added parameter to control the number of cells within a row

When running the stress test, it is now possible to configure the writer to
send mutations for rows that contain a random amount of column updates. This is
controlled via the --min-row-width, --max-row-width and --row-width-seed
parameters.

I did some internal shuffling to make randomly generating numbers within a
range more convenient. See the new RandomWithinRange class for details.


> Add a system stress test based on key/cell/row size
> ---------------------------------------------------
>
>                 Key: ACCUMULO-2789
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2789
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: test
>            Reporter: Sean Busbey
>            Assignee: William Slacum
>            Priority: Minor
>             Fix For: 1.5.2, 1.6.1, 1.7.0
>
>
> Add a system test that allows stress testing an Accumulo instance in the presence of
large cells and rows.
> The test should run a configurable number of ingest and reading clients and allow setting:
> * configurable range of overall key size
> * configurable range of key component sizes
> * configurable value size
> * configurable number of cells per row
> * optional use of isolation on server and/or client
> This kind of test would help us preemptively find issues like ACCUMULO-2671, ACCUMULO-201,
and the tserver memory crashes observed with some large mutation sizes while working on YCSB
support for Accumulo.
> It will also help us provide test examples of supporting large cardinality on rowids,
column families, and visibilities.



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