Read this in GFS2 docs: mmap/splice support for journaled files (enabled by using the same on disk format as for regular files)
... 2010/11/15 Aliet Santiesteban Sifontes <[email protected]> > Should I set mmap_disable = yes when storing indexes in a GFS2 shared > filesystem?? > > 2010/11/15 Aliet Santiesteban Sifontes <[email protected]> > > Ok, I will create a LUN also as a shared clustered storage for indexes, any >> consideration to have into account when the indexes are shared by many >> nodes... >> thank you all... >> >> 2010/11/15 Timo Sirainen <[email protected]> >> >> On 15.11.2010, at 6.44, Aliet Santiesteban Sifontes wrote: >>> >>> > mail_location = >>> > sdbox:/var/vmail/%d/%3n/%n/sdbox:INDEX=/var/indexes/%d/%3n/%n >>> > >>> > /var/vmail is shared clustered filesystem with GFS2 shared by node1 and >>> > node2 >>> > >>> > /var/indexes is a local filesystem at the node, so each node has his >>> own >>> > /var/indexes stuff on ext3 and raid1 for improving performance, I mean >>> each >>> > node a different /var/indexes of its own. >>> >>> This is a bad idea. With dbox the message flags are only stored in index >>> files, so if you lose indexes you lose all message flags. Users won't be >>> happy. >>> >> >> >
