just a quick update:
no issues with NFSv4.0 (load is slowly growing, currently ~7k mailboxes)
instead, bad news from delegation front, we enabled it for a couple of days but we ran in ugly issues: processes went in "uninterruptible sleep" state, load average gets huge, reboot was the only escape :-(
-brd
Alessio Cecchi wrote:
Il 12/06/2015 13:02, brd ha scritto:
Alessio Cecchi wrote: [...]
Have you already try to run NFSv4? it's in place on a (very) small sample of mailboxes in dbox format, no issues up to now (Debian Wheezy mainline kernel)
Good to know, let me know what will be when the load will grow.
When we switch to netapp and nfsv4 we had many problems (lock problems and instability) and we had to go immediately to NFSv3. I don't know if was a netapp problem or nfs client (Debian with 2.6 kernel), now we are using Centos 6 as NFS client and we should re-try to mount mailbox as nfsv4.
when you've had problems, the "delegation feature" was active on Netapp filers? (AFAIK it is disabled by default)
Never enabled "delegation feature" on my netapp.
Probably my issue was on client side. I had to switch immediately to NFSv3 without being able to investigate the problem.
Ciao
Alessio Cecchi http://www.linkedin.com/in/alessice