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From Denis <de...@camfex.cz>
Subject Throttle major compaction.
Date Thu, 28 Feb 2013 13:27:06 GMT
Hi.

Major compaction loads hard disks very hard, even with
tserver.compaction.major.concurrent.max=1

Besides nice peaks on the Load Average and IOstat graps during major
compaction, such high load also badly affects query performance and
latency.

HBase and Cassandra both have settings to throttle major compaction
(Cassandra's default is 16 Mb/s which is about 1/3 of the peek values
I see during Accumulo's major compaction)

But it looks like Accumulo does not have such setting and I have not
found relevant questions in the bugtracker and maillist archive.

How do you deal with the major compaction and its performance effects?

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