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) >
