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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Trivial Update of "Hbase/PerformanceEvaluation" by stack
Date Thu, 20 Dec 2007 16:30:29 GMT
Dear Wiki user,

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

The comment on the change is:
New numbers for TRUNK

------------------------------------------------------------------------------
  ||sequential writes||850||1278||1112||8547||
  ||scans||3063||3692||3758||15385||
  
+ 
+ == HBase TRUNK 12/19/2007, r605675 ==
+ 
+ Below are numbers for version r605675, 12/19/2007.  Looks like writing got a bit better
-- probably because of recent lock refactoring -- but reading speed has almost halved.  I'd
have expected the read speeds to also have doubled but I'd guess there is still a HADOOP-2434
like issue over in the datanode.  I've also added numbers for sequential writes, random and
next ('scan') reads into and out of a single HDFS mapfile for comparison.  Going by current
numbers, pure mapfile writes are slower than the numbers google posted in initial bigtable
paper and reads just a bit faster (except when scanning).  GFS must be fast.
+ 
+ ||<rowbgcolor="#ececec">Experiment Run||HBase20070708||HBase20070916||0.15.0||20071219||mapfile||!BigTable||
+ ||random reads ||68||272||264||167||1718||1212||
+ ||random reads (mem)||Not implemented||Not implemented||Not implemented||Not Implemented||-||10811||
+ ||random writes||847||1460||1277||1400||-||8850||
+ ||sequential reads||301||267||305||138||-||4425||
+ ||sequential writes||850||1278||1112||1691||5761||8547||
+ ||scans||3063||3692||3758||3731||28886||15385||
+ 

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