Is this dm-raid45 ? If so, you'll need to add cluster logic to it (ie. taking locks out on stripe cache accesses, invalidating stripes etc). On Wed, Feb 15, 2006 at 05:05:28PM -0700, Allen Jack wrote: > I have a RAID5 plugin that is also used with clustering. I open the > raid device (created in device-mapper) using the O_SYNC and O_DIRECT > flags, but it seems to read the data from a cache somewhere. I put a > printk in my plugin map function, but it doesn't get hit. If another > node in the cluster changes the data on the disk, it never gets > refreshed on this node because of the caching. > > Is there any way to turn off the caching so that all read requests come > to my plugin? And where is the caching taking place? > > Thanks, > > Allen > > Allen Jack > email - ajack@xxxxxxxxxx > Novell, Inc., the leading provider of information solutions > http://www.novell.com > > -- > > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Red Hat GmbH Consulting Development Engineer Am Sonnenhang 11 Cluster and Storage Development 56242 Marienrachdorf Germany Mauelshagen@xxxxxxxxxx +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
