region unbalanced? which hbase release?
On Tue, Oct 14, 2014 at 3:39 PM, Serega Sheypak <[email protected]> wrote: > Hi, we have 10 nodes cluster with 10HDD, 256 GB RAM and 10HDD 3TB each. > Suddenly we met write perfomance issues. > > Our workload is: > 1. We have 100+ region table for write load. It has constant set of keys > (~6* 10^7) and we write "updates". No versions or stuff like that > 2. We have several read-only tables, theirs size could be from 1 egion up > to 256 regions. > 3. We have several non-used tables theirs size could be from 1 region up > to 256 regions. These tables are previous versions of read-only tables. > > Right now each RegionServer serves >100 regions, but only half of them are > active. Really nothing changed for the last few weeks, we got more non-used > tables, but quantity on active read-only tables is the same, single > wirte-only table dodn't get more bytes to write. > > Can big count of non-used(!!!) regions affect write/read perfomance for > tables which are in use. >
