On Fri, Dec 20, 2013 at 6:19 PM, James Pearce wrote:
>
> "fio --size=100m --ioengine=libaio --invalidate=1 --direct=1 --numjobs=10
> --rw=read --name=fiojob --blocksize_range=4K-512k --iodepth=16"
>
> Since size=100m so reads would be entirely cached
--invalidate=1 drops the cache, no? Our result
"fio --size=100m --ioengine=libaio --invalidate=1 --direct=1
--numjobs=10 --rw=read --name=fiojob --blocksize_range=4K-512k
--iodepth=16"
Since size=100m so reads would be entirely cached and, if hypervisor is
write-back, potentially many writes would never make it to the cluster
as well?
Hello Dan,
On Fri, 20 Dec 2013 14:01:04 +0100 Dan van der Ster wrote:
> On Fri, Dec 20, 2013 at 9:44 AM, Christian Balzer wrote:
> >
> > Hello,
> >
> > On Fri, 20 Dec 2013 09:20:48 +0100 Dan van der Ster wrote:
> >
> >> Hi,
> >> Our fio tests against qemu-kvm on RBD look quite promising, detail
On Fri, Dec 20, 2013 at 9:44 AM, Christian Balzer wrote:
>
> Hello,
>
> On Fri, 20 Dec 2013 09:20:48 +0100 Dan van der Ster wrote:
>
>> Hi,
>> Our fio tests against qemu-kvm on RBD look quite promising, details here:
>>
>> https://docs.google.com/spreadsheet/ccc?key=0AoB4ekP8AM3RdGlDaHhoSV81MDhUS2
- Original Message -
From: "Wido den Hollander"
To: ceph-users@lists.ceph.com
Sent: Friday, December 20, 2013 8:04:09 AM
Subject: Re: [ceph-users] Storing VM Images on CEPH with RBD-QEMU driver
Hi,
> Hi,
>
> I'm testing CEPH with the RBD/QEMU driver throug
Hello,
On Fri, 20 Dec 2013 09:20:48 +0100 Dan van der Ster wrote:
> Hi,
> Our fio tests against qemu-kvm on RBD look quite promising, details here:
>
> https://docs.google.com/spreadsheet/ccc?key=0AoB4ekP8AM3RdGlDaHhoSV81MDhUS25EUVZxdmN6WHc&usp=drive_web#gid=0
>
That data is very interesting a
Hi,
Our fio tests against qemu-kvm on RBD look quite promising, details here:
https://docs.google.com/spreadsheet/ccc?key=0AoB4ekP8AM3RdGlDaHhoSV81MDhUS25EUVZxdmN6WHc&usp=drive_web#gid=0
tl;dr: rbd with caching enabled is (1) at least 2x faster than the
local instance storage, and (2) reaches the
On 12/19/2013 04:00 PM, Peder Jansson wrote:
Hi,
I'm testing CEPH with the RBD/QEMU driver through libvirt to store my VM
images on. Installation and configuration all went very well with the
ceph-deploy tool. I have set up authx authentication in libvirt and that
works like a charm too.
Howeve
Hi,
I'm testing CEPH with the RBD/QEMU driver through libvirt to store my VM
images on. Installation and configuration all went very well with the
ceph-deploy tool. I have set up authx authentication in libvirt and that
works like a charm too.
However, when coming to performance I have big iss
