[performance] Small scans should run like a random-read
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Key: HBASE-2247
URL: https://issues.apache.org/jira/browse/HBASE-2247
Project: Hadoop HBase
Issue Type: Improvement
Reporter: stack
hbase-2180 added pread whenever we do a get -- random-read -- and kept the old
sync+position+read for when scanning. In between is the case of small scans.
Small scans of 0-100 or so rows where the cells are small will likely fit a
single hfile blocksize, especially if its the default 64k. We should recognize
small scans and flip to random-read to satisfy (somehow). It'll up the
performance a bit.
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