This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --hR72digdxOGpffpOAtEa44reDgnaxGDrI Content-Type: multipart/mixed; boundary="WQeH5Mg5P2FQw10eUHPbddub9lX0rt2P4"; protected-headers="v1" From: Max Reitz <mreitz@redhat.com> To: Nir Soffer <nsoffer@redhat.com>, Jason Lelievre <jlelievre@folksvfx.com>, "qemu-block@nongnu.org" <qemu-block@nongnu.org>, Sahina Bose <sabose@redhat.com> Cc: users@ovirt.org Message-ID: <6ff20c92-c9a5-0ae8-3571-f03bd7fc57f1@redhat.com> Subject: Re: [Qemu-block] [ovirt-users] Scheduling daily Snapshot References: <CAHy3Vd3d4-L_UtVE6uD5F0jiyLoUcxdS+3wnCN2Dtt_pSYBUtw@mail.gmail.com> <CAMRbyyvTh0PDeJZmpCK6+qoOprxd=XFEuYn5r8_99C0SFCe=VA@mail.gmail.com> In-Reply-To: <CAMRbyyvTh0PDeJZmpCK6+qoOprxd=XFEuYn5r8_99C0SFCe=VA@mail.gmail.com> --WQeH5Mg5P2FQw10eUHPbddub9lX0rt2P4 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2017-12-07 23:19, Nir Soffer wrote:
On Wed, Dec 6, 2017 at 6:02 PM Jason Lelievre <jlelievre@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 --WQeH5Mg5P2FQw10eUHPbddub9lX0rt2P4-- --hR72digdxOGpffpOAtEa44reDgnaxGDrI Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQFGBAEBCAAwFiEEkb62CjDbPohX0Rgp9AfbAGHVz0AFAloqruoSHG1yZWl0ekBy ZWRoYXQuY29tAAoJEPQH2wBh1c9ACSYIAIX/txzs4mP81hlJookZfAGv958zDdiw umTq2jzMvpDQVYf6HgjrzuVELxMg7DA6T4oI08dGCVyfDq4qyw0xqodvE84wWZkH oWxLQAmR3c8vVBkxkcx5lRM8qs0NydaipZGUSpN65MEGOL0B9j5+06fmmLTHjUc9 nqsmJUjza3tuuWwX9K9yWxdiBqj/58z0/1zp/HaG0/TKJgpwG20OF8xITAf70HwU qLYg6YEUsLu7z6qL5H15g4lAdiMfZ1dSgezdTY4Sm07MBn5vt236XygS3Wag14Y+ 7Sx9e5TLyoNUB6Z+DJ/vG5Y0H98NzyB8flgLqFG0kDVuyjiaF+MV1LU= =B4Uz -----END PGP SIGNATURE----- --hR72digdxOGpffpOAtEa44reDgnaxGDrI--