Swap over the network?
hahn at physics.mcmaster.ca
Mon Oct 1 08:34:28 PDT 2001
> Do you know if it is currently possible to have diskless nodes
> having their swap over the network ?
it's a bit risque, since net IO allocates memory, and usually
swapping happens because you're low on memory. but it apparently
can be done - the topic comes up on the kernel list now and then,
most recently using NBD - network block driver, I think.
I doubt that swapping over NFS would be as easy, since NFS is a
far more complicated beast.
omitting swap is usually a bad idea, since various revisions of the VM
have been unstable in the absence of swap - they used swapcache
allocation as a book-keeping aid, and didn't necessarily generate
any swap *traffic*.
regards, mark hahn.
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