Has anyone used lvm thin prov + btrfs on rhel/cent6u5? The build I am using off base iso with updates thru end feb 2014 so I have not yet applied all updates. However from rhel alerts I see no specific fixes for lvm or btrfs from that date forward. Unless I missed something. With lvm thin prov + ext4 I get expected results. When I take a snapshot. I see the snapshot is the state of the lvm volume at the point of time of snapshot creation. For btrfs, I am using a root subvolume mounted as @foo_root with a thinly provisioned lvm underneath. Same setup just using btrfs. I take a thin snapshot lvcreate -n lv_root_thin -s vg_thin/lv_root snapshot is created activate with lvchange -Kay /dev/vg_thin/lv_root_thin I then mount the snap with mount -odefaults,subvol=@foo_root /dev/vg_thin/lv_root_thin /snaps The contents match the origin lvm. Both lvms, origin and snap stay in sync with whatever changes I make. At one point I thought that maybe it was snapping at the subv level so I decided a snapshot of the root vol. However the deletion also appeared in the thin snapshot Also couple notes: I never see in lvs that the thin snapshot goes -o- online as I do in ext4 chdir into the /snaps and running df -h . shows that I'm in the snapshot chdir into /snaps/\@foo_root and running df -h . shows I'm in the origin vol. <this is where I thought it might be snapping at the "raw" brtfs subvolume level Hopefully this is somewhat clear Regards and TIA 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 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/
