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https://issues.apache.org/jira/browse/ACCUMULO-931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544378#comment-13544378
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Josh Elser commented on ACCUMULO-931:
-------------------------------------
Eric attached a document whose reasoning seems sound to me using the graphs you
provided.
bq. So what is the explanation?
To be sure, "#tables" was a typo? Number of *tablets*.
bq. I looked at performance vs. #tables and there is no correlation between the
ingest performance drops and table splitting.
> Oscillations in Accumulo Ingest Performance
> -------------------------------------------
>
> Key: ACCUMULO-931
> URL: https://issues.apache.org/jira/browse/ACCUMULO-931
> Project: Accumulo
> Issue Type: Bug
> Affects Versions: 1.4.2
> Environment:
> Reporter: Jeremy Kepner
> Attachments: 1ingestor.pdf, 2ingestor.pdf, 3ingestor.pdf,
> 4ingestor.pdf, ingest_performance_explained.pdf
>
>
> Linux 2.6.32, single node, 32 cores, 96 GB RAM, 3x3TB SATA drives, RAID5
> Ingest performance into accumulo varies by 2.5x. Depending upon the number
> of ingestors.
> Performance tests were carried out using Graph500 benchmark (see
> d4m_api/examples/3Scaling/2ParallelDatabase/pDB10_EdgeInsertTEST.m from
> http://www.mit.edu/~kepner/D4M/).
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