On Thu, Sep 18, 2014 at 08:27:18AM -0700, Marc MERLIN wrote: > While debugging a btrfs send/receive slow problem, I now getting this: > legolas:/mnt/btrfs_pool1# btrfs send -p tmp_ggm_daily_ro.20140917_06:29:58 > tmp_ggm_daily_ro.20140918_02:48:24 | ssh gargamel btrfs receive -v > /mnt/btrfs_pool2/backup/debian64/legolas > At subvol tmp_ggm_daily_ro.20140918_02:48:24 > At snapshot tmp_ggm_daily_ro.20140918_02:48:24 > receiving snapshot tmp_ggm_daily_ro.20140918_02:48:24 > uuid=5d1f0454-1be3-b648-9ea5-dc427cd62d98, ctransid=310713 > parent_uuid=d86e69bf-e17f-7f4c-bfb7-e571d5824687, parent_ctransid=308332 > ERROR: could not find parent subvolume > > The parent is there on the other side, but UUID is different: > gargamel:/mnt/btrfs_pool2/backup/debian64/legolas# btrfs subvolume show > tmp_ggm_daily_ro.20140917_06:29:58 > /mnt/btrfs_pool2/backup/debian64/legolas/tmp_ggm_daily_ro.20140917_06:29:58 > Name: tmp_ggm_daily_ro.20140917_06:29:58 > uuid: 3d424a2b-69da-244c-bfcc-c283f9cc1f34 > Parent uuid: 05d3b9be-bfe2-bb4a-9f6a-64b9d44896c7 > Creation time: 2014-09-17 06:30:01 > Object ID: 7873 > Generation (Gen): 83621 > Gen at creation: 83476 > Parent: 263 > Top Level: 263 > Flags: - > Snapshot(s): > > Now it seems that the UUID is different on all my snapshots created by > btrfs send, so maybe it doesn't match UUID? > > Given that, what is btrfs receive using to get a match?
There's a "recieved UUID" field on each subvolume. I posted a patch to userspace a couple of weeks ago which adds a -R option to show it. I don't think it's filtered through David's backlog yet. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- "I will not be pushed, filed, stamped, indexed, briefed, --- debriefed or numbered. My life is my own."
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