At Tue, 30 Oct 2012 19:26:59 +0800, Liu Yuan wrote: > > As for sheepdog, currently we always use O_DIRECT with data objects, so > we don't have this kind of duplicate problem at all.As you mentioned, we > only drop O_DIRECT for inode object, which never have a chance to be > cached in Guest memory. No?
Hmm, you are right. Seems that I was obsessed with using only disk cache. Actually, dropping a page cache for each inode update causes a severe performance degradation and it's not what users want. Thanks, Kazutaka -- sheepdog mailing list [email protected] http://lists.wpkg.org/mailman/listinfo/sheepdog
