Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
/ 2007-01-18 12:22:06 +0000 \ Graham Wood: > > >lvm.conf: > >filter = [ "r|/dev/<real blockdevice>|" ] > Because I only use LVM for the cluster, I've actually got a filter such that lvm only uses /dev/drbd hm. ok. so you are probably _not_ bypassing drbd. you may still have a cache coherency problem, though, see below. > My mail to the list got stuck (due to me typoing) and last night I rebuilt the platform based on rc2. > > I'm going to try and recreate the problem tonight, and will post back. when you read the device to calculate that md5sum, try something which does direct io. or try "blockdev --flushbufs /dev/ice" beforehand. if you have a recent kernel, try "echo 3 > /proc/sys/vm/drop_caches". clvm does only make sure you won't messup the lvm meta data. it does not take care of cache coherency for the page cache of those block devices. on the receiving side, drbd does modify the content of the block device directly -- I'll take patches to notify the page cache about that, to make it drop the corresponding pages :-> -- : Lars Ellenberg Tel +43-1-8178292-0 : : LINBIT Information Technologies GmbH Fax +43-1-8178292-82 : : Vivenotgasse 48, A-1120 Vienna/Europe http://www.linbit.com : __ please use the "List-Reply" function of your email client.