On 2/4/2010 3:17 PM, Bo Lynch wrote: > > Right know we have about 30 or so linux servers scattered through out or > district. Was looking at ways of consolidating and some sort of redundancy > would be nice. > Will clustering not work with certain apps? We have a couple mysql dbases, > oracle database, smb shares, nfs, email, and web servers.
Each app has it's own best way to provide the redundancy and auto-failover and it's own set of tradeoffs of the added complexity vs. the possible reduced downtime if the primary fails. I'd balance the options against the low-tech method of having raid mirrors in swappable bays with a spare similar server chassis or two around plus regular backups kept at a different location. The raid lets you continue in the likely event of a disk failure so you can repair it at a convenient time. Other failures (motherboard, power supply) are less likely but can be handled by swapping the drives into an alternate chassis (and with Centos you'll need to re-assign the IP addresses that are tied to the old NIC mac addresses) with a small amount of downtime. And the backups cover things like operator or software errors (that would wipe a cluster too) or a building-level disaster that destroys the disks or the primary and spare chassis at the same time. Some apps may be worth the effort to do better. -- Les Mikesell lesmikes...@gmail.com _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos