None of those will preserve state, however, which I believe was the main issue being presented by the original poster. I use Linux-HA quite a bit and it's great for service availability, but doesn't really help if you're trying to perform a stateful failover. Brian ----- "randal k" <rkohutek at gmail.com> wrote:
Or you could use Linux-HA, or you could use super-low TTLs and do some monitoring+DNS magic, could do multi-layer proxies as well ... there are lots of ways to ensure uptime on open source software, especially with Linux.
Randal
On Fri, Nov 6, 2009 at 3:25 PM, Brian Sneddon <bsneddon at gc1.com> wrote:
I'll chime in with at least one potential option. If the free SIP proxies/load balancers all fell off the table solely because of lack of stateful HA, then perhaps running your proxy/proxies on VMware vSphere and taking advantage of their Fault-Tolerance feature is an option. I haven't used it personally quite yet, however it's supposed to provide stateful failover for the entire system.
Brian