<div dir="ltr">iscsi is sufficiently performant. I have done extensive testing between iscsi and nfs etc for VM storage. iscsi is very very fast. <div><br></div><div>Ofcourse, the caveat is how your network is also configured. You should definitely perform all the tests that have been recommended in this thread to determine where the bottleneck could be.</div>
<div><br></div><div>On another note, I would love to hear your experiences using Ceph. I've heard that its great in theory but in practice its really not that performant. Any performance numbers would be great. </div>
<div><br></div><div>Thanks,</div><div>- V</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Nov 15, 2013 at 3:37 AM, Antonio Messina <span dir="ltr"><<a href="mailto:antonio.s.messina@gmail.com" target="_blank">antonio.s.messina@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I would test the effective network bandwith with iperf.<br>
<br>
Then I would test the speed of the cinder backend by mounting the<br>
volume locally and running, for instance, iozone.<br>
<br>
Finally, I would test the performance of the iSCSI backend by mounting<br>
the volume on the compute node (or another node) via iSCSI and running<br>
iozone on top of it.<br>
<br>
But I have to admint I don't have much experience with iSCSI :)<br>
<br>
.a.<br>
<div class="HOEnZb"><div class="h5"><br>
On Fri, Nov 15, 2013 at 3:30 AM, Jitendra Kumar Bhaskar<br>
<<a href="mailto:jitendra.b@pramati.com">jitendra.b@pramati.com</a>> wrote:<br>
> Please make sure from block storage to switch and from switch to compute<br>
> node connectivity is in GBs. Means all ports should be GBs.<br>
><br>
> Regards<br>
> Jitendra Bhaskar<br>
><br>
><br>
><br>
><br>
><br>
><br>
> On Fri, Nov 15, 2013 at 6:20 AM, Dnsbed Ops <<a href="mailto:ops@dnsbed.com">ops@dnsbed.com</a>> wrote:<br>
>><br>
>> They are 1000Mb links.<br>
>><br>
>><br>
>> On 2013-11-15 1:40, Razique Mahroua wrote:<br>
>>><br>
>>> Hi,<br>
>>><br>
>>> What is the network link between both?<br>
>>><br>
>>> On 13 Nov 2013, at 19:38, Dnsbed Ops wrote:<br>
>>><br>
>>>> Hi,<br>
>>>><br>
>>>> The design is pretty simple.<br>
>>>> We run nova-compute for VMs management, for example, a server with<br>
>>>> 128GB memory, 12 cores CPU, 300GB SAS (RAID1) disks, to create 20 VMs.<br>
>>>> And, we run cinder as the separated storage service to provide block<br>
>>>> storage for the VMs. For example, each VM gets a block storage with<br>
>>>> 100GB.<br>
>>>><br>
>>>> More details,<br>
>>>><br>
>>>> OS: ubuntu 12.04<br>
>>>> Hypervisor: KVM<br>
>>>> Networking: nova-network for FlatDHCP,multi-host<br>
>>>> glance backend: file<br>
>>>> cinder backend: ceph<br>
>>>> live migration: no need<br>
>>>> object storage: no need<br>
>>>><br>
>>>> Thanks.<br>
>>>><br>
>>>> On 2013-11-14 11:09, Razique Mahroua wrote:<br>
>>>>><br>
>>>>> #2: What's the implementation design?<br>
>>><br>
>>><br>
>><br>
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</div></div><span class="HOEnZb"><font color="#888888">--<br>
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<a href="mailto:antonio.messina@uzh.ch">antonio.messina@uzh.ch</a> <a href="tel:%2B41%20%280%2944%20635%2042%2022" value="+41446354222">+41 (0)44 635 42 22</a><br>
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