> That's a small cluster running on EC2. What instance type?
Should use c1.xlarge or m4.4xlarge, they won't see the possibility of noisy neighbors. Best regards, - Andy Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White) >________________________________ >From: Roman Shaposhnik <[email protected]> >To: [email protected] >Sent: Tuesday, November 8, 2011 5:29 PM >Subject: Re: HBase 0.92/Hadoop 0.22 test results > >On Tue, Nov 8, 2011 at 2:06 PM, Stack <[email protected]> wrote: >> What happened above between 00:43:40 and 00:44:31? > >Not much judging by the logs. In fact that's part of the issue here I think. > >> A big old GC? > >Unlikely -- the RS had tons of Heap, but of course anything's possible. > >> This is a standalone instance with all running in the on VM? > >That's a small cluster running on EC2. So at the very fundamental levels >these are VMs, yes. But for all practical purposes -- it is a fully distributed >standalone set of servers. > >> The YouAreDeadException happens usually when the master has figured >> the RegionServer is dead before the RegionServer has figured it out. >> This can happen when say, the RS has GC paused and first thing it does >> when it comes out of the pause is it heartbeats the master (Meantime >> its probably running the zookeeper session expiration code >> concurrently). > >Right. I'll try to look into that in my testing. I also bumped to the timeout >up to a minute (which I'm really nervous about, though). Lets see... > >Thanks, >Roman. > > >
