Re: NFS Performance Woes

2014-07-22 Thread Ian Chapman
On 21/07/14 20:14, Tom Horsley wrote: Any NFS gurus out there, that can tell me what I'm doing wrong? Not a useful answer, I'm afraid: In my experience, the fundamental problem is caused by using NFS. With all the folks re-writing things that don't need to be replaced, I really wonder why no

Re: NFS Performance Woes

2014-07-22 Thread Ian Chapman
On 21/07/14 21:27, Ed Greshko wrote: For all intents and purpose it looks like its working as it should, it's just painfully slow. Any NFS gurus out there, that can tell me what I'm doing wrong? I've been using NFSv4 extensively for several years and I've not had an issue that you describe

Re: NFS Performance Woes

2014-07-22 Thread Ian Chapman
On 22/07/14 02:39, Peter Skensved wrote: I've been using NFSv4 extensively for several years and I've not had an issue that you describe where everything is fine and then suddenly performance goes to hell in a hand basket. It sounds as if you only have 2 systems to work with? No, tiebreaker

Re: NFS Performance Woes

2014-07-21 Thread Peter Skensved
> > > On 07/21/14 19:59, Ian Chapman wrote: > > Nfsstat, wireshark and the system logs do not show anything which screams > > there's a problem. > > > > The network card in the client machine and the server shows no collisions, > > dropped packets, frame overruns etc. > > > > I've tested with t

Re: NFS Performance Woes

2014-07-21 Thread Ed Greshko
On 07/21/14 19:59, Ian Chapman wrote: > Nfsstat, wireshark and the system logs do not show anything which screams > there's a problem. > > The network card in the client machine and the server shows no collisions, > dropped packets, frame overruns etc. > > I've tested with the export that isn't u

Re: NFS Performance Woes

2014-07-21 Thread Tom Horsley
On Mon, 21 Jul 2014 19:59:40 +0800 Ian Chapman wrote: > Any NFS gurus out there, that can tell me what I'm doing wrong? Not a useful answer, I'm afraid: In my experience, the fundamental problem is caused by using NFS. With all the folks re-writing things that don't need to be replaced, I reall

NFS Performance Woes

2014-07-21 Thread Ian Chapman
Hi, I've been unable to track down an extremely annoying performance issue with NFS. My home server has several exports shared over NFS4. The exports are all secured using Kerberos except one, which can be mounted using the traditional sys security model. The problem is that write performanc