Thanks for the info. Re: the rg size parameter to mkfs.gfs/mkfs.gfs2, can anyone familiar with the code confirm that this is in MiB (1024*1024 bytes), rather than something weird like MB (i.e. 1,000*1,000, but rounded to nearest multiple of block size).
Thanks. Gordan -----Original Message----- From: "Steven Whitehouse" <[EMAIL PROTECTED]> To: "linux clustering" <linux-cluster@redhat.com> Sent: 11/12/08 11:17 Subject: Re: [Linux-cluster] GFS equivalent of ext3's block group size Hi, On Thu, 2008-12-11 at 11:10 +0000, Gordan Bobic wrote: > I'm trying to apply some of the ext2/3 based logic to optimizing GFS on a > RAID array. The idea is to try to make sure block groups all start on > different disks, since beginning of each block group sees most access. If > they are all on one disk, this disk becomes the bottleneck. > > So my question is, what is the equivalent in GFS? I'm guessing at resource > group, but this only seems adjustable in 1MB increments, which is a bit > large. Is there a way to adjust this with finer granularity? > > -- > Linux-cluster mailing list > Linux-cluster@redhat.com > https://www.redhat.com/mailman/listinfo/linux-cluster A resource group is almost the direct equivalent of a block group as you suggest. I don't see any reason why we'd need to restrict them to 1M intervals though, so I suspect that is entirely down to a decision made by the author of mkfs and there is no reason why that couldn't be relaxed in the future, Steve. -- Linux-cluster mailing list Linux-cluster@redhat.com https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@redhat.com https://www.redhat.com/mailman/listinfo/linux-cluster
