FAQ Search Today's Posts Mark Forums Read
» Video Reviews

» Linux Archive

Linux-archive is a website aiming to archive linux email lists and to make them easily accessible for linux users/developers.

» Sponsor

» Partners

» Sponsor

Go Back   Linux Archive > Redhat > Red Hat Linux

LinkBack Thread Tools
Old 09-27-2011, 05:00 PM
"Nicoas C."
Default multi-LUNs storage for mbox : one or many FS?


We are re-thinking the storage of our dovecot mailserver (mbox format).
We decided to create one LUN on each of our RAID (we have 5 x RAID-5 on
a SAN), from there we see two possibilities :

1) creating 5 x VG/LV and filesystems, one for each LUN

* advantages : we insure that every files stored on the FS remains on
the same RAID (disks), we can also control the "distribution" of the
mailboxes on every RAID, if a RAID becomes very solicited, we can move
the data elsewhere.

* drawback : we have to monitor and expand 5 independents filesystems
(we can expect a large number of LUNs after a few expands)

2) creating a single-big VG/LV/FS spread on all LUNs

* advantages : we optimize disk occupation with one filesystem and it
will be very easy to expand and monitor

* drawback (?) : a mailbox can theoretically have its data present on
every RAID, I'm not sure if it's a good or a bad thing, mbox files are
big compared to Maildir but we rarely need to read them entirely

* drawback : a very bad failure (multiple disks crashing) can
compromise the entire storage. Also, we have no control on where the
data are, in case of bad performances, it will be difficult to place
data "elsewhere" as far as we only have a single FS.

It's a bit OT question because it's not specific to Red Hat, but I think
this is a good place to ask.



redhat-list mailing list
unsubscribe mailto:redhat-list-request@redhat.com?subject=unsubscribe

Thread Tools

All times are GMT. The time now is 02:09 PM.

VBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.
Copyright 2007 - 2008, www.linux-archive.org