On 28/11/2011 23:14, Marcelo Salhab Brogliato wrote: > Hi, > I'm new to this list and want your help. > I'm the mail admin for some domains in Rio de Janeiro - Brazil. Today we have > only one machine running dovecot (imap+pop3) with local mail. > We are migrating to two virtual machines in kvm running in separate hosts. > Then we have two main problems: > - How to share mail files to both dovecots? We've been thinking about NFS > using local indexes. Is this a good approach? > - How do we have a fault tolerant mail servers? Our first solutions is using > two IP addresses in our DNS records. > For imap i need only 1 VIP both for loadbalancing or HA, for SMTP u can use dns failover with multiple mx records.
> About NFS using local indexes, I'm configuring a test server. But how to > configure local indexes when my mail_location comes from sql (userdb_home > actually). > I'm using dovecot 1.2.9. I suggest to not use local indexing (for high i/o after failover) , anyway NFS for HA setup works well! If u need a cluster (master/master) consider having an HA loadbancer (dovecot director): -- Simone Caruso IT Consultant +39 349 65 90 805
