Thank you, Ram. >> So are you trying to use bucket cache feature in offheap mode with 1.1.2?
Yes. >> So even in 0.98 you were using bucket cache in offheap mode? Yes, but it is a different hbase cluster and it run 0.98. The one I am trying to setup offheap cache is hbase 1.1.2 -arul On Tue, Sep 12, 2017 at 9:34 AM, ramkrishna vasudevan < ramkrishna.s.vasude...@gmail.com> wrote: > Hi > > So are you trying to use bucket cache feature in offheap mode with 1.1.2? > If so then it is needed that the MaxDirectMemory is greater than the > offheap bucket cache size. > > If you are not using in offheap mode then probably there is no need for > MaxDirectMemory to be greater than bucket cache size. > > >>in Hbase 0.98, I had to set -XX:MaxDirectMemorySize less than > hbase.bucket.cache.size > So even in 0.98 you were using bucket cache in offheap mode? > > Regards > Ram > > On Tue, Sep 12, 2017 at 9:40 PM, Ted Yu <yuzhih...@gmail.com> wrote: > > > Looks like the config you meant should be hbase.bucketcache.size > > > > As the refguide says: > > > > A float that EITHER represents a percentage of total heap memory size to > > give to the cache (if < 1.0) OR, it is the total capacity in megabytes of > > BucketCache. Default: 0.0 > > > > If you specify the size as capacity, -XX:MaxDirectMemorySize should be > > bigger than the capacity. > > > > For #2, did you encounter some error ? > > > > Cheers > > > > On Tue, Sep 12, 2017 at 8:52 AM, Arul Ramachandran <arkup...@gmail.com> > > wrote: > > > > > In HBase 1.1.2, I am setting up bucket cache. I set MaxDirectMemory > size > > > greater than hbase.bucket.cache.size - only then it would work. > > > > > > 1) Does HBASE_REGIONSERVER_OPTS -XX:MaxDirectMemorySize needs to be > > greater > > > than hbase.bucket.cache.size? > > > 2) It seems with hbase 1.1.2, HBASE_MASTER_OPTS also needs the > > > -XX:MaxDirectMemorySize setting? > > > > > > IIRC, in Hbase 0.98, I had to set -XX:MaxDirectMemorySize less than > > > hbase.bucket.cache.size --and-- I did not have to set > > > -XX:MaxDirectMemorySize for HBASE_MASTER_OPTS. > > > > > > > > > Thanks, > > > Arul > > > > > >
