Have you thought about Garbage Collection? -Grover
Sent from my iPhone On Apr 24, 2012, at 12:41 PM, "Skchaudhary" <schoudh...@ivp.in> wrote: > > I have a cluster Hbase set-up. In that I have 3 Region Servers. There is a > table which has 27 Regions equally distributed among 3 Region servers--9 > regions per region server. > > Region server 1 has ---region 1-9 Region server 2 has ---region 10-18 Region > server 3 has ---region 19-27 > > Now when I start a program which inserts rows in region 1 and region 5 (both > under Region Server-1) alternatively and on continuous basis, I see that the > insert time for each row is not constant or consistent---there is a lot of > variance or say standard deviation of insert time is quite large. Some times > it takes 2 ms to insert a row, sometimes 3 ms,sometimes 1000 ms and > sometimes even > 3000 ms.Even though data size in rows is equal. > > I understand that due to flushing and compaction of Regions the writes are > blocked---but then it should not be blocked for larger span of time and the > blockage time should be consistent for every flush/compaction (minor > compaction). > > All in all every time flush and compaction occurs it should take nearly same > time for each compaction and flush. > > For our application we need a consistent quality of service and if not > perfect atleast we need a well visible boundary lines--like for each row > insert it will take some 0 to 10 ms and not more than 10 ms(just an example) > that even though minor compaction or flush occurs. > > Is there any setting/configuration which I should try? > > Any ideas of how to achieve it in Hbase. > > Any help would be really appreciated. > > Thanks in advance!! > > -- > View this message in context: > http://old.nabble.com/Hbase-Quality-Of-Service%3A-large-standarad-deviation-in-insert-time-while-inserting-same-type-of-rows-in-Hbase-tp33740438p33740438.html > Sent from the HBase User mailing list archive at Nabble.com. >
