Hi, any input here? 2015-05-19 2:26 GMT+03:00 Serega Sheypak <serega.shey...@gmail.com>:
> Hi, we are using extremely cheap HW: > 2 HHD 7200 > 4*2 core (Hyperthreading) > 32GB RAM > > We met serious IO performance issues. > We have more or less even distribution of read/write requests. The same > for datasize. > > ServerName Request Per Second Read Request Count Write Request Count > node01.domain.com,60020,1430172017193 195 171871826 16761699 > node02.domain.com,60020,1426925053570 24 34314930 16006603 > node03.domain.com,60020,1430860939797 22 32054801 16913299 > node04.domain.com,60020,1431975656065 33 1765121 253405 > node05.domain.com,60020,1430484646409 27 42248883 16406280 > node07.domain.com,60020,1426776403757 27 36324492 16299432 > node08.domain.com,60020,1426775898757 26 38507165 13582109 > node09.domain.com,60020,1430440612531 27 34360873 15080194 > node11.domain.com,60020,1431989669340 28 44307 13466 > node12.domain.com,60020,1431927604238 30 5318096 2020855 > node13.domain.com,60020,1431372874221 29 31764957 15843688 > node14.domain.com,60020,1429640630771 41 36300097 13049801 > > ServerName Num. Stores Num. Storefiles Storefile Size Uncompressed Storefile > Size Index Size Bloom Size > node01.domain.com,60020,1430172017193 82 186 1052080m 76496mb 641849k > 310111k > node02.domain.com,60020,1426925053570 82 179 1062730m 79713mb 649610k > 318854k > node03.domain.com,60020,1430860939797 82 179 1036597m 76199mb 627346k > 307136k > node04.domain.com,60020,1431975656065 82 400 1034624m 76405mb 655954k > 289316k > node05.domain.com,60020,1430484646409 82 185 1111807m 81474mb 688136k > 334127k > node07.domain.com,60020,1426776403757 82 164 1023217m 74830mb 631774k > 296169k > node08.domain.com,60020,1426775898757 81 171 1086446m 79933mb 681486k > 312325k > node09.domain.com,60020,1430440612531 81 160 1073852m 77874mb 658924k > 309734k > node11.domain.com,60020,1431989669340 81 166 1006322m 75652mb 664753k > 264081k > node12.domain.com,60020,1431927604238 82 188 1050229m 75140mb 652970k > 304137k > node13.domain.com,60020,1431372874221 82 178 937557m 70042mb 601684k > 257607k > node14.domain.com,60020,1429640630771 82 145 949090m 69749mb 592812k > 266677k > > > When compaction starts random node gets I/O 100%, io wait for seconds, > even tenth of seconds. > > What are the approaches to optimize minor and major compactions when you > are I/O bound..? >
