I haven't gotten down to tuning the setup, but out of the box, LinuxHA seems to fail over in about that same 3-5 second time frame. That's with the heartbeat going through the primary LAN interface, and just going by what crm_mon says (with a 5 second update interval).
Once I get DRBD up and running on the nodes, I'm going to do a bit more exhaustive testing and see how quickly and smoothly I get can things to fail over. Maybe now that I've started this thread, it will give me an incentive to spend some more time on this ;-)
On Tue, Feb 10, 2009 at 1:43 PM, Clark, Sean <sean.clark at twcable.com> wrote:
I have it running with Conga/Ricci/lucci redhat-cluster and a 3510 shared disk array. [2 node with shared IP]
I was thinking of switching it over to linux-HA though, because it takes 3-5 seconds to fail over, and this seems too slow for me
how fast does linuxHA failover?
-Sean
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*From:* Gary Baluha [mailto:gumby3203 at gmail.com] *Sent:* Tuesday, February 10, 2009 10:37 AM *To:* hobbit at hswn.dk *Subject:* [hobbit] HA solutions
I know there was a thread on this a while back, and if I recall, there was mention that the 4.3.0 line would have features for HA.
Anyway, I've been working on implementing a 2-node HA Xymon cluster using LinuxHA, and probably DRBD for shared disk (I have yet to implement DRBD, though). The Apache and Xymon services fail over to the other node fairly nicely, and I have successfully testing that using a shared IP to the Xymon web page works. It's still in the early stages of implementation and testing, but so far it appears hold hold promise.
I'd be interesting in hearing about other HA solutions that have been implemented (if any). I don't recall previous mention of LinuxHA, so if no one else has done it, I'll be glad to update the list with my progress.
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