[Lustre-discuss] Rebuilding kernel rpms

[Oleg Drokin]

Hello!

On Dec 17, 2010, at 1:11 PM, Brian J. Murrell wrote:
> I don't know if PAE addresses this limitation but the one other problem
> with 32 bit kernels is the limited amount of RAM (~1GB only, no matter
> how much is in the machine) that the kernel can use.  Given that Lustre
> is all in the kernel, it doesn't make much sense to put even 4G of RAM
> into a system where the kernel can use only 1GB of it.

In fact it's possible to change user/kernel split to let kernel use up to 3G of RAM in such a case.
There was also 1:1 split some time ago, though I have no idea if there are any current patches for that.

That said, I sort of don't understand how the rocks distribution would affect servers vs clients.
I would think just install 64 bits rocks as servers and 32bit rocks as clients and since you don't need to run
anything from the servers on the clients or the other way around and 32bit clients can talk just fine to
the 64 bit servers in Lustre, there should be no problems in such a setup.

Bye,
    Oleg