Hi, On Thu, 2009-02-19 at 20:35 +0000, Stephen Nelson-Smith wrote: > Hi, > > I have a 1TB LUN on an EMC SAN, which I see in /proc/partitions as emcpowera. > > Ultimately I will be sharing this between two, or three machines, but > at present only one is fibre attached. > > I propose to create a GFS2 filesystem now, and use it with one machine > until it becomes necessary to share the LUN with the other machines. > > The backups/storage engineer from my hostco recommends I use a > blocksize of 128kb to ensure there are no missed alignments on the SAN > that could degrade performance. 128kb sounds *huge* given that the > default is 4k. > > Two questions: > > Any problems with the recommended approach - ie mkfs.gfs2 first, worry > about clustering later? > > Is mkfs.gfs2 -b 131072 really sane? > > Thanks, > > S. > Block size is limited by page size, so 4k is as big as you can have I'm afraid, Steve. -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
