From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bob Peterson Date: Thu, 6 Jun 2013 09:30:38 -0400 (EDT) Subject: [Cluster-devel] [PATCH 2/4] mkfs.gfs2: Align resource groups to RAID stripes In-Reply-To: <1370524289.2744.23.camel@menhir> References: <1370520213-29676-1-git-send-email-anprice@redhat.com> <1370520213-29676-2-git-send-email-anprice@redhat.com> <83456593.48037538.1370523424334.JavaMail.root@redhat.com> <1370524289.2744.23.camel@menhir> Message-ID: <801643481.48150826.1370525438027.JavaMail.root@redhat.com> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit ----- Original Message ----- | It has never been valid to assume that all the rgrps are the same size. Well, as I said: due to gfs2_convert, we can't enforce it. However, gfs2_grow and fsck.gfs2 were originally designed under that assumption. Today's gfs2_grow may still be assuming it, which might be wrong, and perhaps should be investigated. (It's been too long since I've looked at it.) My concern here is that gfs2_grow operates properly on a gfs2_converted file system from gfs1 with non-uniform rgrps, especially if the Nth rgrp and N-1th rgrp are different sizes; could damage result? Worth checking. | - Would it be useful to introduce a flag to show the source of an rgrp | (whether mkfs or gfs2_grow) ? Yes, good idea. | - Would it be useful to add a creation date stamp to each rgrp so that | we can see when things have happened in the past? Another good idea. Bob