We are using cheap HW to run our HBase. Problem is in toshiba disks. Thanks!
2015-03-13 20:44 GMT+03:00 Nick Dimiduk <[email protected]>: > HBase is telling you that writes to those datanodes are slow. Is it the > same host names over and over? Probably they have high system load, a bad > or dying disk, bad or dying network adapter, &c. Basically HBase is giving > you a hint to go diagnose your cluster. > > -n > > On Fri, Mar 13, 2015 at 2:44 AM, Serega Sheypak <[email protected]> > wrote: > > > Hi, finally I met HBase perfomance problems :( > > I see this message: > > org.apache.hadoop.hbase.regionserver.wal.FSHLog > > > > Slow sync cost: 345 ms, current pipeline: [] > > > > in log file > > sometimes [] contains actual addresses of my datanodes. > > What are the steps to undestand why HBase is so slow. > > I have 7RS and 3K reads per second and 500 writes per second. Requests > are > > evenly distributed across cluster since I use hash for keys. > > >
