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From: Wido den Hollander <wido@42on.com>
To: ceph-devel <ceph-devel@vger.kernel.org>
Subject: Is rbd_discard enough to wipe an RBD image?
Date: Sun, 20 Dec 2015 22:21:50 +0100	[thread overview]
Message-ID: <56771BEE.4050705@42on.com> (raw)

Hi,

I'm busy implementing the volume wiping method of the libvirt storage
pool backend and instead of writing to the whole RBD image with zeroes
I'm using rbd_discard.

Using a 4MB length I'm starting at offset 0 and work my way through the
whole RBD image.

A quick try shows me that my partition table + filesystem are gone on
the RBD image after I've run rbd_discard.

I just want to know if this is sufficient to wipe a RBD image? Or would
it be better to fully fill the image with zeroes?

-- 
Wido den Hollander
42on B.V.
Ceph trainer and consultant

Phone: +31 (0)20 700 9902
Skype: contact42on

             reply	other threads:[~2015-12-20 21:24 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-20 21:21 Wido den Hollander [this message]
2015-12-21 14:25 ` Is rbd_discard enough to wipe an RBD image? Alexandre DERUMIER
2015-12-21 15:09   ` Jason Dillaman
2015-12-21 15:50     ` Josh Durgin
2015-12-21 19:00       ` Wido den Hollander
2015-12-21 22:20         ` Josh Durgin
2015-12-22 21:55           ` Wido den Hollander

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