[CentOS] Clustering

Les Mikesell lesmikesell at gmail.com
Fri Feb 5 13:57:20 UTC 2010

Bo Lynch wrote:
> Currently we are doing the low tech method. Daily and weekly backups both
> onsite and off along with RAID and all that other good stuff. I was just
> wondering if clustering was a better way of handling things. Thanks for
> the info.

If you are looking at VMware, ESX(i) is the nicest of the bunch but moderately 
expensive for the full version that does clustering and live moves - and you 
also need a highly reliable iscsi disk server.  But even the free version is 
very nice in terms of the management tools, low overhead, and the ability to 
overcommit the host's RAM.  You could start by building shadow copies of most of 
your servers that could be activated as needed, with perhaps a few being live 
with application level failover (heartbeat, drbd, database replication, etc.). 
ESXi is also a nice lab framework for testing new thing.

   Les Mikesell
    lesmikesell at gmail.com

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