On Fri, 4 Jan 2002, Matthew Sackman wrote:
> Well, if you want to get the swap onto another machine then you could try
> using enbd: Extended Network Block Device.
Already got net block device support thanks, but not for swap - it would
be plain silly IMO to run swap over our network unless it were
albosolutely *necessary*. On dedicated fibrechannel based stuff with
gigabit networking things might be a little different :-)
[OT]
I'm looking at using encrypted swap on a new box soon, anyone here doing
this? Usually I have to say I don't bother encrypting swap and rely on
sensitive stuff being mlock()ed :-)
> Or use a patch to get past the 2GB maximum file limit on linux - not
> sure of the state of this with 2.4).
2.4 has LARGEFILE support and most of the useful simple utils now use
O_LARGEFILE create flags kludge when handling files...which is useful.
Anyway, swap is not a regular file and has been handled differently.
> On the other hand, if you're really needing that much swap
Yes, but I'm happy with the amount currently allocated, this isn't an F15K
(though if someone wants to buy me one via Sun's online order site...:P)
> The other thing you might want to try is to use klogd and have it pipe
> output through nc to another machine.
I'll just use remote syslogging for now I think - serial console should
log any future panics . I've installed the serial console now (well it's
there but I'm waiting on adding more serial ports to another box)
> If you have the time to set it up, it might be interesting to use enbd:
> to see which machine falls over first, OTOH, the restriction of bandwidth
> might be successful in slowing down the hammering of VM to a point where
> it's more stable.
I'm already finding 2.4.17 more stable - e.g. it's not so keen to swap
madly whenever it can, it keeps buffer allocation about right too so
far...
--jcm
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