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From: David Goodwin <david@codepoets.co.uk>
To: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: device removal seems to be very slow (kernel 4.1.15)
Date: Tue, 5 Jan 2016 13:04:29 +0000	[thread overview]
Message-ID: <568BBF5D.40304@codepoets.co.uk> (raw)

Using btrfs progs 4.3.1 on a Vanilla kernel.org 4.1.15 kernel.

time btrfs device delete /dev/xvdh /backups

real    13936m56.796s
user    0m0.000s
sys     1351m48.280s


(which is about 9 days).


Where :

/dev/xvdh was 120gb in size.


/backups is a single / "raid 0" volume that now looks like :

Label: 'BACKUP_BTRFS_SNAPS'  uuid: 6ee08c31-f310-4890-8424-b88bb77186ed
	Total devices 3 FS bytes used 301.09GiB
	devid    1 size 100.00GiB used 90.00GiB path /dev/xvdg
	devid    3 size 220.00GiB used 196.06GiB path /dev/xvdi
	devid    4 size 221.00GiB used 59.06GiB path /dev/xvdj


There are about 400 snapshots on it.


thanks
David.

             reply	other threads:[~2016-01-05 13:04 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-05 13:04 David Goodwin [this message]
2016-01-05 13:37 ` device removal seems to be very slow (kernel 4.1.15) Austin S. Hemmelgarn
2016-01-05 16:35 ` Lionel Bouton

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