On Wed, Jan 26, 2011 at 8:36 AM, Gordan Bobic <gordan@xxxxxxxxxx> wrote: > Wendy Cheng wrote: > >> GFS2 fragments very soon and very badly ! Its blocks are all over the >> device due to the nature of how the resource group works. That slows down >> *every* thing, particularly for backup applications. A production deployment >> will encounter this issue very soon and they'll find the issue more than >> annoying. > > While I don't disagree that it's a problem, most people will use GFS and > similar FS-es on a SAN. A typical SAN will allocate sparse files for backing > the block device. That means it'll be badly fragmented very quickly on the > back end regardless of what the FS does. I don't know how a "typical SAN" is defined ... but I could guess which SAN box does this. Did you check their admin guide ? You may be surprised by the turning knobs they offer. -- Wendy > > Gordan > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster > -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
