Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Kelly Byrd wrote: > > On > > Create the RAID, whether it is HW or SW. > > > > Create a LVM VG out of the RAID array(s). > > > > Create LVM LVs out of the VG. > > > > You can create a drbd volume after the fact, you just CANNOT > > create it with the meta-data on that volume you have to locate > > the meta-data on a separate volume. > > > > Aha! I had not thought of that. So if I had an /dev/sda1 as xfs > partition with data on it, I could create drbd1 with /dev/sda1 > as the backing device, locating the meta-data somewhere else? > Then when I sync to the other box, if I'm carefuly about who is > outdated for the initial sync, I'll end up with my xfs and data > on the other box as well? Awesome. Yes, if the meta-data isn't stored on the volume then you can use any existing volume in a new replica. > > I prefer to locate the meta-data separately anyways, I create > > a separate LV for drbd meta-data, and do drbd per-LV instead > > of per RAID array. > > > Besides this onetime trick are there any other reasons? May > I store all my meta-data for a bunch of drbds (each in it's > own LV) in one place? I like to do this because 1) it means I don't have to plan for future replication needs when setting up a volume, 2) if for some unknown reason I wish to switch replication technologies I won't have left-over meta-data hanging out. You can create an LV for each meta-data, or 1 LV for all within a VG as you can specify an index for a meta-data segment in a volume. As long as meta-data segments remain same size between versions, then you can stick with 1 LV for all, but pay attention to upgrades in case this changes, you may need to migrate meta-data over to a new LV if their size changes. It is definitely neater to keep all meta-data for a VG in a single LV. -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.