The bit about 1ms ping times sounds a bit good to me but Dan below says is better. St.Ack
On Wed, Sep 21, 2011 at 6:21 PM, Daniel Washburn <[email protected]> wrote: > > On Sep 21, 2011, at 1:51 PM, Bogdan Ghidireac wrote: > >>> HBase and HDFS are not made to span datacenters. >> >> Yes, I know. I think the correct terminology is 3 availability zones >> within the same region (ping between them is about 1ms) > > [snip] > >>> >>> Is my assumption correct? Should I open a JIRA? >>> >> >> You could paste the thread dump but before doing anything, I'd suggest >> you change your layout so cluster runs inside a single datacenter. >> >> St.Ack > > Echoing St.ack's advice, but not wanting to sound like I'm scolding, you > really should consider moving your AMIs into a single Availability Zone. EC2 > puts up some impressive availability numbers as a platform, but when you > stack several layers of software onto it, you start to push the limits of the > availability zone SLA, and certainly the availability requirements of the > NameNode. > > --Dan > > -- > > Daniel Washburn > Systems Engineer > Explorys, Inc. > [email protected]
