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Re: [Linux-cluster] A home-grown cluster



Branimir wrote:
Hi list ;)

Well, here is my problem. I configured a few productions clusters myself
- mostly HP Proliant machines with ILO/ILO2. Now, I would like to do the
same thing but with ordinary PC hardware (the fact is my wife wants me
to reduce the number of my physical machines ;)). I have three more/less
same PCs, all running CentOS 5.4 with Xen hypervisor. One of them would
be a storage with tgt to handle iSCSI targets.

To be honest, and what bothers me the most is that I don't have a clue
what to use as a fence device? I took ILO for granted, but for me this
is completly new. Can you offer some advice?

Thanks in advance!

Cheers!

Branimir

You know, I've been wondering the same thing now for a little while and had figured it just wasn't possible. I had seen a design a couple of years ago for a serial to reset switch home-brew fence device but I've not been able to find it since. The biggest thing about it was that the author mentioned that, on POST, the serial port would run high and trigger a reset so s/he designed a catch (a cap?) that would put a small enough delay to prevent this POST->fence issue. Personally, I've been thinking of a way to make an inexpensive USB -> reset switch, maybe even an addressable one so that I could have a hub of sorts for a 3+ nodes cluster.

Back to your question; I don't know of a canned solution, but would be quite interested if you found one. If you find an answer off list, do please update this thread!

Best of luck!

Madi


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