Dear Wiki user, You have subscribed to a wiki page or wiki category on "Lucene-hadoop Wiki" for change notification.
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|| +
