Re: [Ocfs2-users] Diagnosing poor write performance

On 31 March 2016 at 04:17, Eric Ren wrote: > Hi, > >> How did you perform the testing? It really matters. If you write a file on >>> shared disk from one node, and read this file from another node, without, >>> or with very little interval, the writing IO speed could decrease by

Re: [Ocfs2-users] Diagnosing poor write performance

On 31 March 2016 at 11:44, Eric Ren <z...@suse.com> wrote: > Hi, > > > On 03/31/2016 01:52 PM, Graeme Donaldson wrote: > >> On 31 March 2016 at 04:17, Eric Ren <z...@suse.com> wrote: >> >> Hi, >>> >>> How did

Re: [Ocfs2-users] Diagnosing poor write performance

On 2 April 2016 at 02:43, Eric Ren wrote: > > Hi, > > >> Yes, so use ocfs2 on top cLVM is good idea if you want it to get >> resilience. I'm not sure if tune.ocfs2 can change block size suchlike >> offline. FWIW, fragmentation is always evil;-) > > > The files are the code and

Re: [Ocfs2-users] Diagnosing poor write performance

On 30 March 2016 at 14:24, Eric Ren wrote: > Hi, >> >> We're seeing very poor write performance on a cluster that was built >> roughly a year ago. I am by no means an expert on OCFS2, nor the DRBD >> layer >> that we have under it. We do have several clusters that are configured