Never saw this kind of discussion. -Anoop-
On Thu, Feb 16, 2017 at 10:13 PM, jeff saremi <jeffsar...@hotmail.com> wrote: > Thanks Anoop. > > Understood. > > Have there been enhancement requests or discussions on load balancing by > providing additional replicas in the past? Has anyone else come up with > anything on this? > thanks > > ________________________________ > From: Anoop John <anoop.hb...@gmail.com> > Sent: Thursday, February 16, 2017 2:35:48 AM > To: user@hbase.apache.org > Subject: Re: On HBase Read Replicas > > The region replica feature came in so as to reduce the MTTR and so > increase the data availability. When the master region containing RS > dies, the clients can read from the secondary regions. But to keep > one thing in mind that this data from secondary regions will be bit > out of sync as the replica is eventual consistent. Because of this > said reason, change client so as to share the load across diff RSs > might be tough. > > -Anoop- > > On Sun, Feb 12, 2017 at 8:13 AM, jeff saremi <jeffsar...@hotmail.com> wrote: >> Yes indeed. thank you very much Ted >> >> ________________________________ >> From: Ted Yu <yuzhih...@gmail.com> >> Sent: Saturday, February 11, 2017 3:40:50 PM >> To: user@hbase.apache.org >> Subject: Re: On HBase Read Replicas >> >> Please take a look at the design doc attached to >> https://issues.apache.org/jira/browse/HBASE-10070. >> >> Your first question would be answered by that document. >> >> Cheers >> >> On Sat, Feb 11, 2017 at 2:06 PM, jeff saremi <jeffsar...@hotmail.com> wrote: >> >>> The first time I heard replicas in HBase the following thought immediately >>> came to my mind: >>> To alleviate the load in read-heavy clusters, one could assign Region >>> servers to be replicas of others so that the load is distributed and there >>> is less pressure on the main RS. >>> >>> Just 2 days ago a colleague quoted a paragraph from HBase manual that >>> contradicted this completely. Apparently, the replicas do not help with the >>> load but they actually contribute to more traffic on the network and on the >>> underlying file system >>> >>> Would someone be able to give us some insight on why anyone would want >>> replicas? >>> >>> And also could one easily change this behavior in the HBase native Java >>> client to support what I had been imagining as the concept for replicas? >>> >>> >>> thanks >>>
