dovecot - May 2007 - Quick question on multiple access to dovecot indexes

I have up to 4 servers that will run dovecot behind a load balancer, which means
the same user might be accessing the same mailbox from multiple servers, and it 
seems like dovecot doesn't like multiple access to the dovecot indexes for
the
one user since I currently have them stored in a nfs home directory.  Is this
a bad thing?  Must I keep a seperate index location per server? 

Just today I started running dovecot on more than one server like this and
started
seeing things in the logs like:

May 25 11:19:13 boomhauer dovecot: IMAP(mcdouga9): Corrupted transaction log
file
/home/mcdouga9/Maildir/dovecot/public/indexes/decs/.support.In/dovecot.index.log:
end_offset (1332) > current
sync_offset (1244)
May 25 11:19:13 boomhauer dovecot: IMAP(mcdouga9): broken sync positions in
index file
/home/mcdouga9/Maildir/dovecot/public/indexes/decs/.support.In/dovecot.index
May 25 11:19:13 boomhauer dovecot: IMAP(mcdouga9): fscking index file 
/home/mcdouga9/Maildir/dovecot/public/indexes/decs/.support.In/dovecot.index
May 25 11:19:13 boomhauer dovecot: IMAP(mcdouga9): Fixed index file 
/home/mcdouga9/Maildir/dovecot/public/indexes/decs/.support.In/dovecot.index:
log file sync pos 2,1332 -> 2, 1244
May 25 11:19:13 boomhauer dovecot: IMAP(mcdouga9): Unexpected transaction log
desync with index
/home/mcdouga9/Maildir/dovecot/public/indexes/decs/.support.In/dovecot.index
May 25 11:19:13 boomhauer dovecot: IMAP(mcdouga9): Disconnected: Mailbox is in
inconsistent state, please relogin.


May 25 11:19:17 dauterive dovecot: IMAP(mcdouga9): file mail-index.c: line 983
(mail_index_sync_from_transactions):
assertion failed: (hdr.messages_count == (*map)->hdr.messages_count)
May 25 11:19:17 dauterive dovecot: child 16386 (imap) killed with signal 6
...
May 25 11:19:53 dauterive in.imapproxyd[17211]: LOGIN:
'"mcdouga9"' (127.0.0.1:53650) on existing sd [9]
May 25 11:19:53 dauterive dovecot: IMAP(mcdouga9): Transaction log file 
/home/mcdouga9/Maildir/dovecot/public/indexes/decs/.support.In/dovecot.index.log:
marked corrupted
May 25 11:19:53 dauterive dovecot: IMAP(mcdouga9): Transaction log file 
/home/mcdouga9/Maildir/dovecot/public/indexes/decs/.support.In/dovecot.index.log.2:
marked corrupted

On Fri, 2007-05-25 at 11:28 -0400, Adam McDougall wrote:
> I have up to 4 servers that will run dovecot behind a load balancer, which
means
> the same user might be accessing the same mailbox from multiple servers,
and it
> seems like dovecot doesn't like multiple access to the dovecot indexes
for the
> one user since I currently have them stored in a nfs home directory.  Is
this
> a bad thing?  Must I keep a seperate index location per server? 
So you're using NFS? Have you read http://wiki.dovecot.org/NFS?

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On Sat, May 26, 2007 at 06:23:45PM +0300, Timo Sirainen wrote:

  On Fri, 2007-05-25 at 11:28 -0400, Adam McDougall wrote:
  > I have up to 4 servers that will run dovecot behind a load balancer,
which means
  > the same user might be accessing the same mailbox from multiple servers,
and it
  > seems like dovecot doesn't like multiple access to the dovecot
indexes for the
  > one user since I currently have them stored in a nfs home directory.  Is
this
  > a bad thing?  Must I keep a seperate index location per server? 
  
  So you're using NFS? Have you read http://wiki.dovecot.org/NFS?
  
Oops, sorry.  I will take that information into account.