Re: [Dovecot] GlusterFs - Any new progress reports?

[John Lyons]

  Sure .. but you can break the index files in exactly the same way as
  with NFS. :)
  
 That is right :)

For us, all the front end exim servers pass their mail to a single final
delivery server. It was done so that we didn't have all the front end
servers needing to mount the storage. It also means that if we need to
stop local delivery for any reason we're only stopping one exim server.

The NFS issue is resolved (I think/hope) by having the front end load
balancer use persistent connections to the dovecot servers.

All I can say is we've used dovecot since it was a little nipper and
have never had any issues with indexes.

Regards

John
www.netserve.co.uk

Re: [Dovecot] GlusterFs - Any new progress reports?

[John Lyons]

Dare I ask...(as it's not exactly clear from the Gluster docs)

If I take 5 storage servers to house my /mail can my cluster of 5 front
end dovecot servers all mount/read/write to /mail.

The reason I ask is the docs seem to suggest I should be doing 5
servers, having 5 partitions, one for each mail server?

Any clues?

Regards

John

Re: [Dovecot] Dovecot and SATA Backend - filesystems

[John Lyons]

 The generally don't see any bugs/issues is the part I'm worried about
 (generally isn't comforting).

I was covering my  on that one. Sods law dictates as soon as I say
'never' we'll discover an issue.

 If you use a more traditional filesystem like ext2/ext3/ufs/etc then yes.
 But you can use a cluster filesystem to get around this, and run  
 active-active.

I've spent a week looking at the likes of PVFS, GFS, Lustre and a whole
host of different systems, including pNFS (NFS 4.1)

At the risk of diverting the thread away from the SATA backend, is there
any recommendation for a fault tolerant file service.

I'm really looking for 3 or 4 boxes to store data/metadata to support 10
Apache and Dovecot servers. 

The things I don't like are having a single metadata server be a single
point of failure.

Regards

John

[Dovecot] live and backup auth database

[John Lyons]

Is there a way of setting dovecot to use two mysql authentication databases, 
either in a live/failover format or a round robin method.


Regards

John