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)> 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) you had a look here for known bugs? https://kb.netapp.com/support/index?id=3014338&page=content ciao -brd
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
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