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From James Taylor <jtay...@salesforce.com>
Subject Re: independent scans to same region processed serially
Date Sun, 10 Feb 2013 08:30:03 GMT
Filed https://issues.apache.org/jira/browse/HBASE-7805
Test case attached
It occurs only if the table has a region observer coprocessor.


On 02/09/2013 11:04 AM, lars hofhansl wrote:
> If I execute in parallel multiple scans to different parts of the same region, they appear
to be processed serially. It's actually faster from the client side to execute a single serial
scan than it is to execute multiple parallel scans to different segments of the region. I
do have region observer coprocessors for the table I'm scanning, but my code is not doing
any synchronization.
> >>

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