HI Liu, When using cache=writeback are writes flushed to the cluster on REQ_FUA/FLUSH? Or are they only flushed to object cache? Joseph. On Tue, May 7, 2013 at 6:06 AM, Liu Yuan <namei.unix at gmail.com> wrote: > On 05/07/2013 08:45 PM, Valerio Pachera wrote: > > Is it possible to enable cache only on some nodes of the cluster? > > > > Sure. The object cache stores the data on the node where runs sheep > daemon that VM connect to. > > There are two ways to disable object cache: > 1 no '-w' option enabled at startup. Cache is completely disabled for > this node. Cache option control from QEMU command is meaningless. > > 2 '-w' for sheep is enabled. Then QEMU take control of cache mode of > the VM connected to this sheep. > - cache=writeback, enables the writeback cache for this VM > - cache=directio, disable the cache for this VM > - cache=writethrough, enables the writethrough cache for this VM > > Thanks, > Yuan > -- > sheepdog-users mailing lists > sheepdog-users at lists.wpkg.org > http://lists.wpkg.org/mailman/listinfo/sheepdog-users > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.wpkg.org/pipermail/sheepdog-users/attachments/20130507/2c605f53/attachment.html> |