From: Robert White <rwhite@pobox.com>
To: Phillip Susi <psusi@ubuntu.com>, Chris Murphy <lists@colorremedies.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: BTRFS messes up snapshot LV with origin
Date: Tue, 18 Nov 2014 17:29:12 -0800 [thread overview]
Message-ID: <546BF268.5050706@pobox.com> (raw)
In-Reply-To: <546B68F8.6080008@ubuntu.com>
On 11/18/2014 07:42 AM, Phillip Susi wrote:
> On 11/18/2014 1:16 AM, Chris Murphy wrote:
>> (stuff about UUIDs and LVM snapshots).
> (suggestion to use LVM paths instead).
This is also an XFS+LVM+LVM_Snapshot problem going back to at least
2009. It's inherent to the block-device-level snapshot phenomonia.
q.v. http://www.miljan.org/main/2009/11/16/lvm-snapshots-and-xfs/ et al
In XFS you attack the snapshot with a command to regenerate the UUID as
soon as you take the snapshot. I don't think there is a "regenerate all
my UUIDs" command for BTRFS.
There are other places this can bone you, like old-format mdadm mirrors,
where the metadata was only at the end of the partition so you could
accidentally see two copied of your RAID1 file system if you hand't
built/started the array.
There is no really good way to prevent this other than "being really
careful" or "not doing that at all".
Sorry. Cost of doing business. Cheers...
Rob.
next prev parent reply other threads:[~2014-11-19 1:29 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-16 21:35 BTRFS messes up snapshot LV with origin MegaBrutal
2014-11-17 1:42 ` Duncan
2014-11-17 6:59 ` Brendan Hide
2014-11-17 7:35 ` Daniel Dressler
2014-11-17 9:00 ` Brendan Hide
2014-11-17 19:04 ` Goffredo Baroncelli
[not found] ` <CAE8gLh=VubBbZdeKTAuWRjOxPF7C+ouUeeVvmGfT2ckYWGhQVA@mail.gmail.com>
2014-11-17 19:45 ` Fwd: " MegaBrutal
2014-11-17 20:32 ` Goffredo Baroncelli
2014-11-18 6:16 ` Chris Murphy
2014-11-18 15:42 ` Phillip Susi
2014-11-18 19:17 ` Chris Murphy
2014-11-18 20:17 ` Phillip Susi
2014-11-19 2:54 ` Chris Murphy
2014-11-19 15:20 ` Phillip Susi
2014-11-19 18:35 ` Chris Murphy
2014-11-19 19:23 ` Phillip Susi
2014-11-21 4:28 ` Zygo Blaxell
2014-11-21 6:22 ` Duncan
2014-11-21 11:35 ` Robert White
2014-11-21 11:54 ` Duncan
2014-11-21 17:56 ` Zygo Blaxell
2014-11-21 23:09 ` Duncan
2014-11-21 18:23 ` Chris Murphy
2014-11-21 22:49 ` Duncan
2014-11-21 23:41 ` Duncan
2014-11-21 23:51 ` Duncan
2014-11-22 17:34 ` Goffredo Baroncelli
2014-11-23 0:19 ` Zygo Blaxell
2014-11-25 16:34 ` Goffredo Baroncelli
2014-11-25 20:29 ` Zygo Blaxell
2014-11-25 21:59 ` Goffredo Baroncelli
2014-11-25 22:21 ` Zygo Blaxell
2014-11-25 22:47 ` Chris Murphy
[not found] ` <CAJCQCtQUM=viSoPtcJMcyKquYb1DLmEsqBi=p++uXPy63+r3Ow@mail.gmail.com>
[not found] ` <20141126021134.GR17380@hungrycats.org>
2014-11-26 4:48 ` Chris Murphy
2014-11-26 17:19 ` Goffredo Baroncelli
2014-11-27 4:15 ` Zygo Blaxell
2014-11-28 17:05 ` Goffredo Baroncelli
2014-11-29 1:25 ` Robert White
2014-11-29 7:35 ` Goffredo Baroncelli
2014-11-29 8:02 ` Robert White
2014-11-29 7:37 ` MegaBrutal
2014-11-29 4:59 ` Zygo Blaxell
2014-11-29 7:55 ` Robert White
2014-12-01 15:25 ` Zygo Blaxell
2014-11-26 3:22 ` Duncan
2014-11-26 5:11 ` Chris Murphy
2014-11-26 22:08 ` Robert White
2014-11-27 9:08 ` Duncan
2014-11-28 7:10 ` Chris Murphy
2014-11-29 7:29 ` Duncan
2014-11-29 8:20 ` Robert White
2014-11-29 9:41 ` Duncan
2014-11-29 16:33 ` Robert White
2014-11-29 16:50 ` Robert White
2014-11-30 6:46 ` Duncan
2014-11-29 21:15 ` Chris Murphy
2014-11-18 20:41 ` MegaBrutal
2014-11-19 1:29 ` Robert White [this message]
2014-11-19 3:37 ` Duncan
2014-11-21 4:24 ` Zygo Blaxell
2014-11-18 6:21 ` Chris Murphy
2014-11-18 12:13 ` Duncan
2014-11-18 20:01 ` Goffredo Baroncelli
-- strict thread matches above, loose matches on Subject: below --
2014-11-17 8:00 MegaBrutal
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