Lars, Thanks for the info. It looks more like ~10min without tuning?
Btw,my testing was on Hadoop 1 Demai on the run On Mar 20, 2014, at 11:20 PM, lars hofhansl <[email protected]> wrote: > Depends. If a machine fails hard and HDFS 2.x is setup correctly I'd expect > this to be the ZK timeout (180s by default in 0.94, but can be lowered) + a > few minutes to rejigger things. > > -- Lars > > From: Demai Ni <[email protected]> > To: "[email protected]" <[email protected]>; lars hofhansl > <[email protected]> > Sent: Wednesday, March 19, 2014 9:16 AM > Subject: Re: How much time HBase will take if one Region Server down. > > Lars, > > I didn't get the 15~20 min from the article. I played a bit with my clusters > on 94 early last year, and got a ball-park number. Well, my cluster was using > all the default hbase configuration at that time, so it definitely wasn't > well tuned. So for HBase 94, what's a reasonable MTTR # from your > experience? Thanks > > Demai > > > On Tue, Mar 18, 2014 at 10:51 PM, lars hofhansl <[email protected]> wrote: > Many of the improvement were made in HDFS, so benefit 0.94 equally. > Not sure where you read 15-20 minutes for 0.94 in that article. > > -- Lars > > > > ________________________________ > From: Demai Ni <[email protected]> > To: "[email protected]" <[email protected]> > Sent: Tuesday, March 18, 2014 10:59 AM > Subject: Re: How much time HBase will take if one Region Server down. > > > a good article to start with: > http://hortonworks.com/blog/introduction-to-hbase-mean-time-to-recover-mttr/ > > I would say 15~20 min for 94 or earlier; it can be reduced to a couple min > with HBase 96+ and Hadoop . > > Demai > > > > On Tue, Mar 18, 2014 at 10:55 AM, Upendra Yadav <[email protected]>wrote: > > > How much time HBase will take if one Region Server down and try to read > > Region that belong to this down Region Server. > > > > Means Is there service down for those all region that belongs to dead RS? > > > > How much time HMaster will take to assign those region to live RS? What is > > the dependencies that may increase region assignment in such situation. > > > > Thanks.... > > > > >
