On 09/06/2012 06:01 PM, cmcc.dylan wrote: > > >> >2. 596 and even 700MB/sec makes me think you measure not real disk I/O, but memory (cache). > i'm also think this is a results due to cache, for example page cache in the host os. Do you have some ideas bypassing memory cache? > > Check your kvm command line. IIRC, KVM has a fully-cached mode of operation. Writes to guest "disk" will not actually reach the disk for a while. While this is nice, this is an unfair comparison from a benchmark PoV, because of you are, of course, trading away a bit of your data-safety. It is still safe against guest power-off, but not necessarily against host power-off. Also, since there is no magic, this can hurt you in very dense scenarios. The "-drive" parameter will probably have a "cache" specifier, which is what you are looking for. _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/containers
