similar to: NFSv4 delegation

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 the backends is accessing each users data at a time. So I can?t see anything but problems form enabling

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

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

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 means that NFS/Dovecot clients are caching data (mainly dovecot >

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 data (mainly dovecot index files) but they have to revalidate the cache frequently asking to the NFS

Hi, We are running into a problem with a Samba setup and would like to know if a current fix or workaround is at all possible. Our setup is a NetApp filer serving NFS v4 that is mounted by Solaris and Linux servers. On those servers we are using Samba to create shares of those NFSv4 mounted filesystems. We are migrating to this NFSv4 setup from an existing Solaris NFSv3+Posix ACL setup that also

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 (repeated continuously): Aug 17 20:28:17 pop01eeh dovecot: imap(info at domain.com): Error:

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

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 operations you have 40-50% of GETATTR,

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 Dovecot/Director and NetApp (but without clustered mode), mailbox are in Maildir

I know this was discussed a lot a few years ago, but my google searches aren't quite getting me where I'm confident in the answer, so I figure I'd just ask again here if that's ok. Here's what we have, and what we'd like to do: Storage is a Netapp (cluster mode CDOT 8.2 I believe), it's NFS exported to our linux system. Linux system is CentOS 6 and can NFS mount the

Hi, I'm running 3 Dovecot director and 6 Dovecot backend on CentOS 6 and Dovecot 2.3.10, with Maildir shared on NFSv3 (on NetApp). Since CentOS 6 will be EOL on November I started to upgrade to CentOS 7 the first Dovecot backend. But after Director start to direct users on new CentOS 7 server some errors, for any users, come up, an example: Aug 21 14:56:41 Error: imap(alessio at

I have a situation where I need to share, via Samba, a filesystem mounted via NFSv4. I'm struggling with the best way to make Samba see the NFSv4 ACLs and enumerate them to provide the proper SMB/CIFS access to the files, instead of "Access Denied" errors that I currently get. Looking at the Samba source, the only obvious NFSv4 stuff appears to be the following: - zfsacl, available

Good morning, folks. I'm involved in a project to enforce NFSv4 ACL's across a variety of storage platforms, in particular NetApps sharing NFS. That works fiine with the NetApp NFS qtrees, but we'd like to share those with CIFS clients as well. This works, and restricts access the way we expect NFSv4 ACL's to work, but the Windows clients cannot view any of the security settings

Am 20.03.2015 um 10:45 schrieb Volker Lendecke: > On Thu, Mar 19, 2015 at 05:47:11PM +0100, Robert Schetterer wrote: >>> Well the API is propably just stuffing blobs into extended >>> attributes directly from userspace. That's how most of >>> the NFSv4 ACLs usually get done :-(. >>> >>> Of course all implementations use different blobs containing

> On Dec 3, 2015, at 17:24, Jeremy Allison <jra at samba.org> wrote: > >> On Thu, Dec 03, 2015 at 03:54:21PM -0700, Nick Couchman wrote: >> I have a situation where I need to share, via Samba, a filesystem mounted via NFSv4. I'm struggling with the best way to make Samba see the NFSv4 ACLs and enumerate them to provide the proper SMB/CIFS access to the files, instead

We recently had a strange NFS performance anomaly between a V880 running snv_124 and two NetApp filers. To investigate, a DTrace NFSv4 (and eventually NFSv3) client provider would been extremely helpful. Unfortunately, all I could find were a request for code review of a v3 client provider and another request for help developing a v4 provider. Nothing seems to have come from those initiatives,

Hi everybody and thanks to those persons who make klibc being possible. I am booting a lessdisks system from a server. I have got it in NFSv3 but I would like use the features of NFSv4. I am using initramfs-tools so I have in my initrd.img the utility nfsmount wich make possible booting in NFSv3. I would like know if exists some version of nfsmount or some patch or, if does not, some program (a

Hi all, are there any non-commercial solutions (apart from solutions like Dell EMC, IBM and NetApp) around that allow to simultaneously access the same file system via NFSv4 and Samba exports in a (nearly) non-conflicting manner, especially w.r.t. to NFSv4/Windows ACL incompatibilities? Best Sebatian ____________________ Sebastian Kraus Team IT am Institut f?r Chemie Geb?ude C, Stra?e des 17.

Hi, What is the magic juju that I have to put in /etc/sysconfig/autofs to get autofs to default to using NFSv4, rather than NFSv3, for mounting file systems? I don't want to place these flags into the automount maps themselves because we have a varied network with Sun, CentOS, RedHat and Macintosh systems, and the flags that have to get added to automount maps (which we distribute centrally