Am 31.10.2011 12:28, schrieb Felipe Scarel: > 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).
i wouldnt do that with drbd as such big setup , there should be enough money using better choices > > On Mon, Oct 31, 2011 at 08:00, Robert Schetterer <rob...@schetterer.org > <mailto:rob...@schetterer.org>> wrote: > > Am 31.10.2011 10:43, schrieb Arlin: > > 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 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-boun...@dovecot.org > <mailto:dovecot-boun...@dovecot.org> > [mailto:dovecot-boun...@dovecot.org > <mailto:dovecot-boun...@dovecot.org>] On > > Behalf Of Robert Schetterer > > Sent: 31 October 2011 14:26 > > To: dovecot@dovecot.org <mailto: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:ar...@mvs.us <mailto:ar...@mvs.us>] > >> Sent: 28 October 2011 17:06 > >> To: 'dovecot@dovecot.org <mailto: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 > > -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
