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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Trivial Update of "Hbase/PerformanceEvaluation" by stack
Date Fri, 25 Apr 2008 05:53:36 GMT
Dear Wiki user,

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The following page has been changed by stack:
http://wiki.apache.org/hadoop/Hbase/PerformanceEvaluation

The comment on the change is:
Add anchor

------------------------------------------------------------------------------
   * [#description Tool Description]
   * [#first_test First Evaluation of Region Server] -- June 8th, 2007
   * [#second_test Second Evaluation of Region Server] -- September 16th, 2007
+  * [#0_1_2 HBase Performance Evaluation Run] -- April 25th, 2008
  
  [[Anchor(description)]]
  == Tool Description ==
@@ -138, +139 @@

  
  Subsequently I profiled the mapfile PerformanceEvaluation.  Turns out generation of the
values and keys to insert were taking a bunch of CPU time. After making a fix key and value
generations were between 15-25% (the alternative was precompiling keys and values which would
take loads of memory).  Rerunning tests, it looks like there can be a pretty broad range of
fluctuation in mapfile numbers between runs.  I also noticed that the 0.15.x random reads
seem to be 50% faster than TRUNK.  Investigate.
  
+ [[Anchor(0_1_2)]]
  == HBase 0.1.2 (Candidate) 04/25/2008 ==
  
  Numbers for the 0.1.2 candidate.  The 'mapfile', '20071219', and '!BigTable' columns are
copied from the 'TRUNK 12/19/2007' above.  The new columns are for 0.1.2 and for mapfile in
0.16.3 hadoop (This latter test uses new MapFilePerformanceTest script).

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