On Thu, 14 Aug 2003, Carpenter, Mark wrote: > Anybody know of a reliable way to cause buffer cache pages to be purged (not > written to disk, but released)?? > > Problem: In a shared disk environment, changes made by the owner (R/W) are > not seen by R/O sharers in a timely fashion. This is especially problematic > when the Linux virtual machine has a sizable virtual memory size allowing it > to have lots of buffercache. In small memory Linux images, the changes are > recognized fairly quickly, you can force by editing a sizeable file which > will cause the buffercache pages to be re-used (stolen). > > I realize that this is unsafe in the general sense (writing to a minidisk > that is shared by others), but I believe that it is fairly safe in the usage > I am attempting.
I'm not too surprised you're having problems, nor will I be surprised if others reckon you're off your head;-) What will work is NFS. What might work is one of other the networking options: nbd (standard part of the kernel, but you may need to build a kernel with it built in) enbd http://www.it.uc3m.es/~ptb/nbd/ drdb http://www.complang.tuwien.ac.at/reisner/drbd/ -- Cheers John. Join the "Linux Support by Small Businesses" list at http://mail.computerdatasafe.com.au/mailman/listinfo/lssb Copyright John Summerfield. Reproduction prohibited.
