Did a quick scan through the changes committed since 0.94.1: HBASE-6608 HBASE-6364 HBASE-6587 HBASE-6537 HBASE-6713 HBASE-6438 HBASE-6299 HBASE-7018 HBASE-7038 HBASE-7060
Any chance you can do this again with 0.94.2 (or even do a binary search through the commits to pinpoint the change)? -- Lars ________________________________ From: Nicolas Liochon <[email protected]> To: [email protected]; lars hofhansl <[email protected]> Sent: Tuesday, November 27, 2012 10:42 AM Subject: Re: small perf degradation in 0.94 trunk vs. older versions It was Version 0.94.3, r38dbd22c99debd9010e9e5f4fbabeeaf3c4e1ddd On Tue, Nov 27, 2012 at 7:41 PM, lars hofhansl <[email protected]> wrote: Interesting. Thanks N. > >I'll look through the 0.94 commits since 0.94.1 to see what's causing this. >With 0.94 trunk you mean the 0.94.3RC? > > >-- Lars > > > >________________________________ > From: Nicolas Liochon <[email protected]> >To: [email protected] >Sent: Tuesday, November 27, 2012 5:07 AM > >Subject: small perf degradation in 0.94 trunk vs. older versions > > >Hi, > >On a create table / reassignment, I feel we lost some performances recently >on 0.94. It's not huge (5% to 10%), but I would prefer them to be the other >way around. >Here are some tests I've done on test cluster, all the time with Hadoop >1.1.0; > >scenario: 2 RS. Create a table with 3000 regions. >Start a third RS. Kill -15 the second one: there are 1500 regions to >reassign. > >I've made multiple measures, there are all there: >It's in seconds. > >Creating a table with 3000 regions: >0.92: 261s; 260s >0.94.0: 260s; 260s >0.94.1: 261s; 260s >0.94 trunk: 292s; 281s; 282s; >0.96 trunk: 173s; 178s > >Reassign after the kill >0.92: 107s, 110s >0.94.0: 105s; 105s >0.94.1: 107s; 107s >0.94 trunk: 122s; 105s; 116s >0.96 trunk: 50s; 50s; > >I don't know if there is a reason the the 0.94 trunk results... >The results for 0.96s are actually not that great, my tests (on a single >machine) were much better a few months ago. I will look at that. > >Cheers, > >N.
