-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 joe digital wrote: > > Hi, We would like to build a postfix & Dovecot active/active mail > cluster with a shared data backend (ocfs2 or gfs). Has anyone done this > with or without the use of front end load balancers (done with DNS?). > If so can you let me know if there is any documentation out there or > email threds explaining this proccess or setup? My organization is actually operating two Postfix/Dovecot clusters using these tools (and running on top of Debian 4.0), and I know at least two other organizations who are using the same tools for the same objective. We use GFS as the shared storage (served via FC) and LVS in order to balance the load between the nodes. We also use Heartbeat for high availability of the directors. The load balancing can also be done with a DNS round-robin; in a first thought I can't find any problems that would arise in both SMTP and IMAP using well-established desktop applications and proper service configuration. I can't point you to specific documents, though we used some ideas from the Ultramonkey methodology [1] and the GFS FAQ [2] -- I'd advise you to get your GFS working in two or more nodes and then work on the load balancing, first using DNS round-robin and then with ldirector. Jose [1] http://www.ultramonkey.org/3/topologies/hc-ha-lb-overview.html [2] http://sources.redhat.com/cluster/gfs/faq.html -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFH5Z9iUWAsjQBcO4IRAn+DAJ0aEJB0bPrw1taosLBtoH5z9EunkQCghFPX zbxaJoS8HDw5Qc0d517VOlE= =r4ap -----END PGP SIGNATURE----- -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
