On 11/23/2011 02:16 PM, Eric Blake wrote: > On 11/23/2011 06:01 AM, Frank Murphy wrote: >> Can a single physical disk, >> be used as a shared swap-drive. >> Among virtual Guests? > (...) having multiple guests simultaneously running while using the same > disk image for shared swap is a recipe for disaster.
Sorry for barging into this thread but the question made me curious. What about using multiple disk images (one per guest), on the same *physical* disk? What are the performance implications? Of course swapping isn't that fast to begin with, but would a guest that is not under excessive memory pressure be noticably slower if you have multiple guests swapping to the same physical disk? Are there special considerations to swapping that you don't have with non-swap IO? Can you do 'swap ballooning' where you have let's say 10GB physical disk space and you give 6 VMs 2GB swap space each, hoping they'll never all use all of their swap space? Emanuel _______________________________________________ virt mailing list [email protected] https://admin.fedoraproject.org/mailman/listinfo/virt
