On Mon, Nov 23, 2009 at 10:25 PM, Rodolfo Gonzalez Gonzalez <rgonzalez@gnt.cc> wrote:
Hello all,
has someone worked with DRBD (http://www.drbd.org) for HA of mail storage? if so, does it have stability issues? comments and experiences are thanked :)
Thanks, Rodolfo.
We have deployed active/passive DRBD Mailserver for a customer with ~ 5000 mailboxes. runs nice without any problems.
CentOS 5.3 Heartbeat 1 ! DRBD 8.3.x LVM
If you try to use LVM/ext3 with DRBD and you want to use consistend snapshots, use this setup
http://www.drbd.org/users-guide-emb/s-lvm-drbd-as-pv.html
Storage layer:
disks/hwraid/softwareraid -> drbd -> LVM -> fs
this way lvm can trigger the fs with a freezecall before the blocklevel snapshot.
We currently migrate our 10000 Mailcluster from a netapp storage to multiple storage server with drbd.
Our other project the webcluster runs with about 1000 sites (Typo3/Joomla) on a CentOS nfs-server backed with the drbd. The failover time is about 4 seconds and no pending write ist lost.