Hi Ted, thanks for giving the link, our scenario is just such a case; We're looking forward to see this feature in HBase 1.1; Thanks!
2015-05-27 22:11 GMT+08:00 Ted Yu <[email protected]>: > Please see > https://blogs.apache.org/hbase/entry/the_hbase_request_throttling_feature > > Cheers > > On Tue, May 26, 2015 at 12:35 AM, ShaoFeng Shi <[email protected]> > wrote: > > > Hello, > > > > Currently we're running a MapReduce over live htables to do table merge > > (introduced at https://hbase.apache.org/0.94/book/mapreduce.example.html > ); > > At the samtime these tables are still serving user scan requests; As this > > is a full table scan which may take much server resources, we want to > > control the impact to users during the MapReduce, avoding remarkable > > performance downgrade during the MR; I see there are two parameters might > > be related: caching and cacheBlocks, like : > > > > > > scan.setCaching(500); > > > > scan.setCacheBlocks(false); // don't set to true for MR jobs > > > > > > But still want to double check with the experts here, is there other ways > > to control this? Thanks! > > > > Shaofeng Shi > > Apache Kylin (incubation) > > >
