Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
> -----Original Message----- > From: drbd-user-bounces at lists.linbit.com > [mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of CA Lists > Sent: Friday, June 22, 2007 10:24 AM > To: drbd-user at lists.linbit.com > Subject: [DRBD-user] Shrinking Filesystem > > I have two iSCSI targets that I have drbd 8.0.3 running on > (CentOS 5). I'm > using OCFS2 on my nodes. My question is, which filesystem do I need to > shrink for DRBD? Do I want to shrink the iSCSI disk on the nodes > (/dev/sdb1), the actual block device on both iSCSI targets > (/dev/sdb), or > the drbd device on the iSCSI targets (/dev/drbd0)? And can I > do this after I > have used OCFS2 to format the disk? Thanks, You can't shrink OCFS2, but if you did then your setup doesn't lend itself well to this. I recommend a setup like this: iSCSI SAN, say you have a RAID50 with 1.3TB of storage and a RAID10 with 500GB of storage on your iSCSI server. Create 2 VGs, 1 called say RAID50.1 another called say RAID10.1 out of each hardware array PV (say /dev/sdc and /dev/sdd). Say you then had 2 clusters using these volumes, there are a couple of ways of slicing it up, but I would probably allocate a whole block of storage for each cluster based on current needs and expected growth and let the clusters further divide it up on their end with CLVM and GFS or LVM and OCFS2. So maybe create 2 LVs on raid50.1 and 2 LVs on raid10.1: cluster1.data and cluster2.data on raid50.1 cluster1.log and cluster2.log on raid10.1 On the cluster nodes these would appear as say /dev/sdc and /dev/sdd. I would then create 2 VGs on the clusters called, data.1 and log.1 out of the 2 iSCSI drives. >From those I can then allocate on the cluster side the shared file systems needed, grow and shrink them as I see fit without having to involve the iSCSI target or drbd in the process. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.