Re: [Dovecot] Dovecot and SATA Backend

2009-11-23 Thread Joseba Torre
El Viernes 20 Noviembre 2009 a las 14:47, Mario Antonio escribió: Could you share how you have configured Dovecot in order to achieve replication, redundant path .? I have configured nothing on dovecot's side. We have a lot of EMC gear providing most of the features, maildirs in a

Re: [Dovecot] Dovecot and SATA Backend

2009-11-21 Thread Thomas Harold
On 11/16/2009 8:00 AM, Nicolas GRENECHE wrote: Hi all, I plan to run a dovecot IMAPS and POPS service on our network. We handle about 3 000 mailboxes. I thought first buying a topnotch server (8 cores and 16 Go RAM) with equalogic iSCSI SAN SAS 15K for storage backend. We run about 300

Re: [Dovecot] Dovecot and SATA Backend

2009-11-20 Thread alex handle
Extra question, what is the better : iSCSI SATA backend or NFS share ? NFS share is more convenient to have a failover server. Everyone wants to use nfs for mailstorage, because it is convenient, but nfs is the wrong storage model for mail. NFS shines on big files but metadata performance is

Re: [Dovecot] Dovecot and SATA Backend

2009-11-20 Thread Robert Schetterer
alex handle schrieb: Extra question, what is the better : iSCSI SATA backend or NFS share ? NFS share is more convenient to have a failover server. Everyone wants to use nfs for mailstorage, because it is convenient, but nfs is the wrong storage model for mail. NFS shines on big files but

Re: [Dovecot] Dovecot and SATA Backend

2009-11-20 Thread Nicolas KOWALSKI
Robert Schetterer rob...@schetterer.org writes: sorry for the stupid question what is DAS do you have a link etc for it, to get more info See http://en.wikipedia.org/wiki/Direct-attached_storage -- Nicolas

Re: [Dovecot] Dovecot and SATA Backend

2009-11-20 Thread Joseba Torre
El Viernes 20 Noviembre 2009 a las 13:05, alex handle escribió: to put it simply: local storage We use Dell R710 in pair, each with 6 15K SAS Disks and RAID 10 - iSCSI or NFS can hardly be faster But faster is not always the way to measure things. In this topic, I think that raw disk

Re: [Dovecot] Dovecot and SATA Backend

2009-11-20 Thread alex handle
But faster is not always the way to measure things. In this topic, I think that raw disk access speed is not a critical value; I've tested our setup with maildir on NFS and performance is close enough to local disks. Given this, I prefer the extra features our NAS/SAN setup gives us, like

Re: [Dovecot] Dovecot and SATA Backend - filesystems

2009-11-19 Thread Eric Jon Rostetter
Quoting John Lyons j...@support.nsnoc.com: 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.

Re: [Dovecot] Dovecot and SATA Backend - filesystems

2009-11-18 Thread 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

[Dovecot] Dovecot and SATA Backend

2009-11-16 Thread Nicolas GRENECHE
Hi all, I plan to run a dovecot IMAPS and POPS service on our network. We handle about 3 000 mailboxes. I thought first buying a topnotch server (8 cores and 16 Go RAM) with equalogic iSCSI SAN SAS 15K for storage backend. On second though (and after a comprhensive read of dovecot features), I

Re: [Dovecot] Dovecot and SATA Backend

2009-11-16 Thread Eric Jon Rostetter
Quoting Nicolas GRENECHE nicolas.grene...@gmail.com: I plan to run a dovecot IMAPS and POPS service on our network. We handle about 3 000 mailboxes. I thought first buying a topnotch server (8 cores and 16 Go RAM) with equalogic iSCSI SAN SAS 15K for storage backend. Sounds like overkill to

Re: [Dovecot] Dovecot and SATA Backend

2009-11-16 Thread Nicolas GRENECHE
2009/11/16 Eric Jon Rostetter eric.rostet...@physics.utexas.edu: Quoting Nicolas GRENECHE nicolas.grene...@gmail.com: I plan to run a dovecot IMAPS and POPS service on our network. We handle about 3 000 mailboxes. I thought first buying a topnotch server (8 cores and 16 Go RAM) with equalogic

Re: [Dovecot] Dovecot and SATA Backend

2009-11-16 Thread Eric Jon Rostetter
Quoting Nicolas GRENECHE nicolas.grene...@gmail.com: It should be a future option, but index management will be more tricky as you stated. If you want to do any kind of clustering/failover, even in the future, then I would go with iSCSI/SAN of some sort instead of NFS... Just my $0.02. The