Re: [ovirt-users] [Qemu-block] Scheduling daily Snapshot
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From: Max Reitz <mreitz(a)redhat.com>
To: Nir Soffer <nsoffer(a)redhat.com>, Jason Lelievre <jlelievre(a)folksvfx.com>,
"qemu-block(a)nongnu.org" <qemu-block(a)nongnu.org>,
Sahina Bose <sabose(a)redhat.com>
Cc: users(a)ovirt.org
Message-ID: <6ff20c92-c9a5-0ae8-3571-f03bd7fc57f1(a)redhat.com>
Subject: Re: [Qemu-block] [ovirt-users] Scheduling daily Snapshot
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On 2017-12-07 23:19, Nir Soffer wrote:
On Wed, Dec 6, 2017 at 6:02 PM Jason Lelievre
<jlelievre(a)folksvfx.com
<mailto:jlelievre@folksvfx.com>> wrote:
=20
Hello,
=20
What is the best way to set up a daily live snapshot for all VM, an=
d
have the possibility to recover, for example, a specific VM to a
specific day?
=20
=20
Each snapshot you create make reads and writes slower, as qemu has to
lookup data through the entire chain.
=20
When we take a snapshot, we create a new file (or block device) and mak=
e
the new file the active layer of the chain.
I'm not sure how much this is going to slow you down exactly, but I can
tell you that there are also incremental backups to look into.
(e.g. https://wiki.qemu.org/Features/IncrementalBackup)
Max
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