On Sun, Oct 14, 2012 at 09:44:39PM +0800, Shu Ming wrote: > 于 2012-10-14 5:15, Dan Kenigsberg: > > On Thu, Oct 11, 2012 at 11:38:19PM +0800, Shu Ming wrote: > >> After reading the code, every mailbox should be 4096 byte size. > >> And the total mailbox size is host * 4096. Ony one host is here, so > >> the total mailbox size here is 4096. why should the 'dd' operation > >> read 1024000 byte which is 1000K byte much lager than 4096 here? > > The controlling parameter is MAX_HOST_ID=250, not the number of current > > cluster members. > I am wondering if we can do some optimization here, like to read and > write the block size linear to the current cluster members.
There is a big place for optimization (and testability), as I've mentioned in a previous post. We do not have a cluster membership algorithm; only Engine knows how many host are currently in the cluster. This knowledge can be propagated to the SPM, I do not see an imminent race in this, but I guess a couple of problems lurk there. Dan. _______________________________________________ vdsm-devel mailing list firstname.lastname@example.org https://lists.fedorahosted.org/mailman/listinfo/vdsm-devel