Dimitri Maziuk said: >On 08/20/2012 05:01 PM, Yount, William D wrote: >> I am trying to set up an Active/Active cluster. I have an >> Active/Passive cluster up and running. > > I don't remember seeing a clear explanation of when, where, and why > you'd actually want an active/active cluster. I never needed one myself, > so can't really help you there.
you need an active/active cluster when the load is too heavy for a single box to handle it. >> I don't understand how it could be called an Active/Active cluster >> if you aren't allowed to run the IP address on two servers at once. > > You are not allowed to run the IP address on two servers at once, full > stop. Complain to Rob Kahn and Vint Cerf. This is not true. It is possible to run the same IP address on two servers at the same time. CLUSTERIP is the way to do it for load sharing in one network. ANYCAST is the approach you would use to distribute the work across different datacenters. ANYCAST has severe limitations on what you can do with it, but CLUSTERIP is far more flexible and can work in just about any local active/active problem. David Lang _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
