Quick question about the usage of DRBD: I'm thinking of a setup on my organization here (15k+ users, 4TB of email data), but I'm holding back on the clusterization due to the high volume of data.
Using DRBD would implicate mirroring those 4TB of data across all cluster nodes? If yes, I might go with a SAN-based solution, though I haven't studied much about that setup yet (the other sysadm administrates the VMs and SAN, gotta ask him a few questions).
On Mon, Oct 31, 2011 at 08:00, Robert Schetterer robert@schetterer.orgwrote:
Hi Robert,
Thanks for the reply. We are upgrading Dovecot to v2.0.15 and other component's to the latest version. In that case, can we use san for storage or are you recommending that drbd with ocfs2 is the best way to attain
Am 31.10.2011 10:43, schrieb Arlin: the
horizontal scalability for the mail storage?
Hi Arlin, there is no best way, you should choose whatever fits best to your needs an haves so it depends on many stuff ( i.e at last finance, network, manpower, knowledge) etc
So all i can say iam just using a loadbalanced cluster setup with drbd ocfs2 maildir dovecot postfix mysql clamav spamassassin on ubuntu lucid lts with 3000 Mailboxes without any big Problems yet but i can imagine that a professional SAN might be better in performance but there is a lot other other questions left , i.e maildir must not be the best solution for mailbox format etc
cluster setups with lots of mailboxes are complex in many ways, if you planning a real big mailservice you should ask more here on this list for existing other setups and choose i.e Timo and/or others for professional and paid advice and work
Thanks, Arlin
-----Original Message----- From: dovecot-bounces@dovecot.org [mailto:dovecot-bounces@dovecot.org]
On
Behalf Of Robert Schetterer Sent: 31 October 2011 14:26 To: dovecot@dovecot.org Subject: Re: [Dovecot] How can we horizontally scale Dovecot across multiple servers?
Am 31.10.2011 09:47, schrieb Arlin:
Could anyone please respond to this query. Thank you!
you may use loadbalancers i.e (keepalived etc) and/or
http://wiki2.dovecot.org/FeatLoginProxy http://wiki2.dovecot.org/PasswordDatabase/ExtraFields/Proxy
look the list for cluster setups etc
reading your former post you want to use many outdated prog versions dont do that a san for storage might be a good choice some of the list use drbd with ocfs2 and other cluster filesystems
From: Arlin [mailto:arlin@mvs.us] Sent: 28 October 2011 17:06 To: 'dovecot@dovecot.org' Subject: How can we horizontally scale Dovecot across multiple servers?
Hi,
How can we horizontally scale Dovecot across multiple servers? Do we require to install independent instances of Dovecot on each server?
We are planning to use a NAS/SAN device using ZFS or EFS for email
storage.
Each logical unit will be of 10TB and similarly as the no: of user increases we are planning to add multiple 10TB units.
In this case how we can manage the email storage on multiple volumes from Dovecot.
The configuration of our existing system is:-
Dovecot 1.0.15 / Maildirs
Postfix 2.5.5
Debian 5.0.9 (Lenny)
MySQL 5.0.15
Please advise.
Thanks in advance.
Creative Regards,
Arlin
-- Best Regards
MfG Robert Schetterer
Germany/Munich/Bavaria
-- Best Regards
MfG Robert Schetterer
Germany/Munich/Bavaria