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From "WXR" <1485739...@qq.com>
Subject Re: iSCSI IO performance is worse than NFS,why?
Date Wed, 31 Jul 2013 16:42:50 GMT
Does your iSCSI primary storage offer better disk IO performance than NFS?




------------------ Original ------------------
From:  "Aaron Delp"<aaron.delp@citrix.com>;
Date:  Thu, Aug 1, 2013 00:18 AM
To:  "users@cloudstack.apache.org"<users@cloudstack.apache.org>; 

Subject:  Re: iSCSI IO performance is worse than NFS,why?



> Sorry, I don't have enough KVM experience to comment or troubleshoot.



On 7/31/13 9:00 AM, "WXR" <1485739420@qq.com> wrote:

>kvm
>
>
>
>
>------------------ Original ------------------
>From:  "Aaron Delp"<aaron.delp@citrix.com>;
>Date:  Wed, Jul 31, 2013 11:40 PM
>To:  "users@cloudstack.apache.org"<users@cloudstack.apache.org>;
>
>Subject:  Re: iSCSI IO performance is worse than NFS,why?
>
>
>
>On 7/31/13 8:32 AM, "WXR" <1485739420@qq.com> wrote:
>
>
>>I find that the disk IO performance of vm instances on
>>iSCSI(sharedmountpoint) primary storage is worse than that on NFS primary
>>storage.
>>
>>When I use a single hdd and create a NFS share as primary storage,the
>>disk IO performance is pretty good.
>>But when I use the same hdd and create a iSCSI lun as primary storage,the
>>disk IO performance is lower than NFS.
>>
>>I think the disk IO performance of iSCSI should be better than NFS.
>
>> What hypervisor are you using to attach?
>
>
>.

.
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