Thanks for the response and insight! I will try to manipulate sequentially/mutually exclusively as in making changes when only one is online/active I have had a screen session open on ttyS1 and don't recall a flurry of concerning console messages, but will double check, unless you meant they, btrfs developers, should have this type of issue burble up as a kernel message. I'll probably give a post to btrfs with your insight listed and see what they say as well thanks and regards ________________________________________ From: linux-lvm-bounces@redhat.com <linux-lvm-bounces@redhat.com> on behalf of Zdenek Kabelac <zkabelac@redhat.com> Sent: Monday, September 22, 2014 6:02 PM To: LVM general discussion and development Subject: Re: lvm thin provisioning snapshots and btrfs Dne 23.9.2014 v 00:15 Robb Walker napsal(a): > Also see the same results on ubu 14.04.1 lvm thin provisioning + btrfs. haven't tried arch 3.16 kernel and tools yet > It's likely btrfs problem that it is not reporting duplicity problem? In lvm2 we try to detect duplicate PVs and report problem and pick one to use. Btrfs needs to do the same - I'd expect some kernel messages about these kind of problems? Snapshot activation is skipped here for a reason. It's upto user/admin to avoid system confusion. So my best advice is - to ensure you do not have active origin & snapshot at the same time - especially when manipulating with btrfs - since it most likely ignore device UUID generated by lvm (and that should be unique) You will need to check disk btrfs identifiers if you need to have active these volumes at the same time. > Robb Walker > Linux/Unix Services > Desk (312)542-2361 ~ Mobile (312)804-6034 > Email: rwalker@drw.com > DRW Holdings, LLC ~ 540 West Madison St. Chicago, IL 60661 > Regards Zdenek _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ This e-mail and any attachments may contain information that is confidential and proprietary and otherwise protected from disclosure. If you are not the intended recipient of this e-mail, do not read, duplicate or redistribute it by any means. Please immediately delete it and any attachments and notify the sender that you have received it in error. Unintended recipients are prohibited from taking action on the basis of information in this e-mail or any attachments. The DRW Companies make no representations that this e-mail or any attachments are free of computer viruses or other defects. _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
