:-(
-Ursprüngliche Nachricht-
Von: pve-devel [mailto:pve-devel-boun...@pve.proxmox.com] Im Auftrag von Dmitry
Petuhov
Gesendet: Freitag, 17. Oktober 2014 08:04
An: pve-devel@pve.proxmox.com
Betreff: Re: [pve-devel] backup ceph high iops and slow
16.10.2014 22:33, VELARTIS Philipp
18 Octobre 2014 09:47:08
Objet: RE: [pve-devel] backup ceph high iops and slow
We read 64K blocks, so
Don't for for backup, but drive-mirror have a granulary option to change
the
block size:
# @granularity: #optional granularity of the dirty bitmap, default is 64K.
# Must be a power
+RBD supports read-ahead/prefetching to optimize small, sequential reads.
+This should normally be handled by the guest OS in the case of a VM,
How should we do read-ahead inside qemu? manually?
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pve-devel mailing list
pve-devel@pve.proxmox.com
, VELARTIS Philipp Dürhammer
p.duerham...@velartis.at, Dmitry Petuhov mityapetu...@gmail.com
Envoyé: Dimanche 19 Octobre 2014 18:07:30
Objet: RE: [pve-devel] backup ceph high iops and slow
+RBD supports read-ahead/prefetching to optimize small, sequential reads.
+This should normally
We read 64K blocks, so
Don't for for backup, but drive-mirror have a granulary option to change the
block size:
# @granularity: #optional granularity of the dirty bitmap, default is 64K.
# Must be a power of 2 between 512 and 64M.
Although it would be much easier it
16.10.2014 22:33, VELARTIS Philipp Dürhammer пишет:
Why do backups with ceph make so high iops?
I get around 600 iops for 40mb/sec which is by the way very slow for a backup.
When I make a disk clone from local to ceph I get 120mb/sec (which is the
network limit from the old proxmox nodes) and
.
- Mail original -
De: Dmitry Petuhov mityapetu...@gmail.com
À: pve-devel@pve.proxmox.com
Envoyé: Vendredi 17 Octobre 2014 08:04:04
Objet: Re: [pve-devel] backup ceph high iops and slow
16.10.2014 22:33, VELARTIS Philipp Dürhammer пишет:
Why do backups with ceph make so high iops?
I get
] backup ceph high iops and slow
16.10.2014 22:33, VELARTIS Philipp Dürhammer пишет:
Why do backups with ceph make so high iops?
I get around 600 iops for 40mb/sec which is by the way very slow for a backup.
When I make a disk clone from local to ceph I get 120mb/sec (which is the
network limit from
Auftrag von Dmitry
Petuhov
Gesendet: Freitag, 17. Oktober 2014 09:25
An: Alexandre DERUMIER
Cc: pve-devel@pve.proxmox.com
Betreff: Re: [pve-devel] backup ceph high iops and slow
I think that skipping free space isn't main issue: backup of used space is even
slower.
17.10.2014 10:31, Alexandre
diet...@proxmox.com
À: VELARTIS Philipp Dürhammer p.duerham...@velartis.at, Dmitry Petuhov
mityapetu...@gmail.com, Alexandre DERUMIER aderum...@odiso.com
Cc: pve-devel@pve.proxmox.com
Envoyé: Vendredi 17 Octobre 2014 13:02:29
Objet: RE: [pve-devel] backup ceph high iops and slow
I agree. The main
Why do backups with ceph make so high iops?
I get around 600 iops for 40mb/sec which is by the way very slow for a backup.
When I make a disk clone from local to ceph I get 120mb/sec (which is the
network limit from the old proxmox nodes) and only around 100-120 iops which is
the normal for a
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