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.
