On 8/18/2015 11:37 AM, Alessio Cecchi wrote:
Il 18/08/2015 17:25, Tom Talpey ha scritto:
On 8/18/2015 10:46 AM, Alessio Cecchi wrote:
Hi,
in this tipical setup (Dovecot/Director thate share Maildir via NFS) on
your NFS Server you have (about) 90% of read operations and only 10% of
write
Hi,
last day I tried to enable nfsv4 delegation on my cluster (enable
nfsv4.0 and read delegation on Netapp and remount the volume on Linux
Centos 6.7 clients with Dovecot+Director).
It was a failure, after some minutes the load on clients was high, and
in dovecot.log I found these errors
Hi,
in this tipical setup (Dovecot/Director thate share Maildir via NFS) on
your NFS Server you have (about) 90% of read operations and only 10% of
write operations.
If you see detailed stats for NFS operations you have 40-50% of GETATTR,
this means that NFS/Dovecot clients are caching
Hi,
Just out of curiosity what is in nfsv4 delegation that you think would give a
benefit on your configuration?
If I read back the thread you seem to have dovecot configured with director
ring in front of the backends. In that case Dovecot already manages storage in
a way that only one of
Il 18/08/2015 17:25, Tom Talpey ha scritto:
On 8/18/2015 10:46 AM, Alessio Cecchi wrote:
Hi,
in this tipical setup (Dovecot/Director thate share Maildir via NFS) on
your NFS Server you have (about) 90% of read operations and only 10% of
write operations.
If you see detailed stats for NFS
On 8/18/2015 10:46 AM, Alessio Cecchi wrote:
Hi,
in this tipical setup (Dovecot/Director thate share Maildir via NFS) on
your NFS Server you have (about) 90% of read operations and only 10% of
write operations.
If you see detailed stats for NFS operations you have 40-50% of GETATTR,
this
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
Good to know.
Please update us during the moving of mailboxes.
I'm also interested into know if you have find benefit from switch to
NFSv4 from NFSv3 (load on storage, cache benefits or others).
Thanks
Il 09/07/2015 17:08, brd ha scritto:
just a quick update:
no issues with NFSv4.0 (load
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
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
Il 11/06/2015 16:03, brd ha scritto:
hi all,
i'm managing a large installation of a dovecot cluster in director + NFS
backend architecture and we are moving from NFSv3 to NFSv4. Our NFS
server is a Netapp
Hi,
I'm running a similar configuration, expect for the size (medium), with
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