| Posted by SoftDux, 01-13-2010, 05:30 PM | |
Hi all,
I wonder if anyone can shed some light on this topic.
Let's say I have 2 servers, each with a Q9550 Core2Quad CPU, 8GB RAM & 4x250GB HDD's in RAID10 configuration. Or, for that matter any server setup. This is just an example.
Would I be able to set these up in a high availability cluster, with XEN VPS's running on either of these, and then if one of the servers fail (power failure / software crash / PSU problem / etc), then the VPS's will automatically switch-over to the other server and continue running?
I know, traditionally one would have a NAS with the VPS' on the NAS, and then run the VPS's on the 2 servers and either one can take over from the other one. But with today's powerful servers, would it not be possible to make the 2 servers their own NAS's, and then replicate the 2 NAS server's data across (on a 2nd 1GB link) to have this kind of setup?
And then, if this can be done, what are the chances of doing this with a 3 server setup, and make sure that at any given time you have at least 35 - 40% (leave some margin for the OS + NAS + Webmin, etc) free resources (RAM / CPU / HDD) on each server, to take over the 3rd server if it crashes?
Can this be done with CloudMin, and if anyone has done it before, please share your setup, or experience with me on this?setting up a 2-servser / 3-server high availability cluster
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| Posted by devonblzx, 01-17-2010, 03:04 PM | |
As far as I see, cloudmin doesn't offer any failover/load balancing. All the cloud in cloudmin means is you can manage multiple servers. I think it is kind of misleading.
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| Posted by DUR0N, 01-19-2010, 05:18 PM | |
A bit late, but look into DRBD. It offers exactly what you need, and is used often in the hosting world. http://www.drbd.org/
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| Posted by virtualcomplete, 01-20-2010, 05:51 PM | |
I recommend looking into Webmin and Heartbeat. Using those you can create a high availability setup. Although you have to have a really advanced setup to create no failure points.
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| Posted by SoftDux, 01-28-2010, 07:29 AM | |
so, what can I use? Or isn't there anything like this?
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| Posted by Michaelz, 10-01-2010, 07:58 AM | |
Most likely.
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