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From "andychen (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-3040) BlockIndex readIndex too slowly in heavy write scenario
Date Sun, 26 Sep 2010 03:31:32 GMT
BlockIndex readIndex too slowly in heavy write scenario

                 Key: HBASE-3040
                 URL: https://issues.apache.org/jira/browse/HBASE-3040
             Project: HBase
          Issue Type: Improvement
          Components: regionserver
    Affects Versions: 0.20.6
         Environment: 1master, 7 region servers, 4 * 7 clients(all clients run on region server
host),  sequential put
            Reporter: andychen

region size is configured with 128M,  block size is 64K, the table has 5 column families
at the beginning, when region split, master assigns daughters to new region servers, new region
server open region, readIndex of this region's storefile(about 1000 blocks) spent 30~50ms,
with the data import region server spent more and more time (sometimes up to several seconds)
to load 1000 block indices

at right now, we resolve this issue by getting all indices of one hfile within one DFS read
instead of 1000 reads.
is there any other better resolution?

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