Different opinion, we successfully use NFS in most of our large scale deployments of MagicMail, with little or no issues, but you do have to have a proper NFS server. You can never go wrong with NetApp, and they aren't that expensive any more.. have deployments working like that for almost 20 years..
On 11/6/23 07:25, Paul Kudla wrote:
Ok (My Opinion Only)
NFS in general does not work well on active servers, although dovecot allows for various locking mech's they do generally trip over each other.
This occurs on NFS mounts using a single server and just goes down hill from there if you have 2 servers talking to the same NFS file mount.
Simply put its a crap shoot what will work and when
I know this is a touchy subject but this is what replication was used for and works well between 2 or more servers updating email boxes in real time
It does require a proper database (MySql or Postgresql) and prefereably a dedicated private network between the two mail servers running dovecot.
I tried everything noted in this post and it just does not work.
Have A Happy Monday !!!
Thanks - Paul Kudla (Manager SCOM.CA Internet Services Inc.)
Scom.ca Internet Services http://www.scom.ca 004-1009 Byron Street South Whitby, Ontario - Canada L1N 4S3
Toronto 416.642.7266 Main 1.866.411.7266 Fax 1.888.892.7266 Email paul@scom.ca
On 11/6/2023 9:54 AM, Aki Tuomi via dovecot wrote:
On 06/11/2023 16:48 EET lejeczek via dovecot dovecot@dovecot.org wrote:
Hi guys.
I see that with mailboxes stored on a network mount-point and more than one box with Dovecot using such a mailbox, Dovecots step on each others toes. ... lmtp(minemail@lemko.xyz)<2674357><uATxGqbaSGW1zigAn4O9eQ>: Error: lmtp-server: conn unix:pid=2600068,uid=89 [2]: rcpt minemail@my.private: Mailbox INBOX: Corrupted transaction log file /VMAIL/my.private/minemail/dovecot.index.log seq 4: ext intro: name_size too large (sync_offset=6368) ... Above happened if the same one user was having mail delivered on two Postfix+Dovecot servers at the same time.
I hope experts who know Dovecot's internals better can tell... having such multiple node/server Dovecots "talking" to that same network mount-point but!.. only one Dovecot being active - having Postfix using it and other, however many, Dovecots only "idling" - not having Postifx using it (+ no client connections is a goal too) Would that make such multi-Dovecot setup safe & free from errors as above & any storage related ones?
Or perhaps there are other ways to have many Dovecots with the same user-base, using same networked storage simultaneously?
many thanks, L.
Hi guys.
I see that with mailboxes stored on a network mount-point and more than one box with Dovecot using such a mailbox, Dovecots step on each others toes. ... lmtp(minemail@lemko.xyz)<2674357><uATxGqbaSGW1zigAn4O9eQ>: Error: lmtp-server: conn unix:pid=2600068,uid=89 [2]: rcpt minemail@my.private: Mailbox INBOX: Corrupted transaction log file /VMAIL/my.private/minemail/dovecot.index.log seq 4: ext intro: name_size too large (sync_offset=6368) ... Above happened if the same one user was having mail delivered on two Postfix+Dovecot servers at the same time.
I hope experts who know Dovecot's internals better can tell... having such multiple node/server Dovecots "talking" to that same network mount- point but!.. only one Dovecot being active - having Postfix using it and other, however many, Dovecots only "idling" - not having Postifx using it (+ no client connections is a goal too) Would that make such multi-Dovecot setup safe & free from errors as above & any storage related ones?
Or perhaps there are other ways to have many Dovecots with the same user-base, using same networked storage simultaneously?
many thanks, L.
Hi!
See https://doc.dovecot.org/configuration_manual/nfs/
This applies to other shared mountpoints too.
Aki
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