[Users] Storage Performance Issue !

[Sander Grendelman]

You give very little information about your setup and the problem.

- What kind of storage do you use? ( software or hardware raid? how
many spindles? what kind of disks?)
- Does it have battery backed cache? Is the battery on this cache OK?
- How much IO, with how much latency, is generated on the hosts? ( run
some diagnostics e.g. "iostat -mx 10" for a couple of minutes on a
host )
- How much IO, with how much latency, is generated on the VMs?
- Is IO on the host better than on the guest? How much? (test!)
- What is the storage type of the storage domain? ( local FS? iSCSI?
Fibre Channel? GlusterFS? )
- What type of IO controller do you use in the guest? ( IDE? virtio?
virtio-scsi? )
- Do you use thin- or thick provisioned disks?
- Do you use snapshots?

On Wed, Feb 19, 2014 at 4:56 AM, Vishvendra Singh Chauhan
<singh.exam at gmail.com> wrote:
> Hi,
>
> My network is 1 Gigabit. And i am using my each node in a separate
> cluster/DC.
>
> And memory and processor uses are very low. Means when i run 30 vms then
> it's processor uses is 45% and memory uses is 35% around.
>
>
> On Tue, Feb 18, 2014 at 2:14 PM, Dafna Ron <dron at redhat.com> wrote:
>>
>> what is the network configuration? are you using each host with it's own
>> cluster/DC as a local storage host?
>> how many hosts are we talking about? what is the memory/cpu consumption on
>> the hosts?
>>
>>
>>
>> On 02/18/2014 01:18 AM, Vishvendra Singh Chauhan wrote:
>>>
>>> Thanks Dafna,
>>>
>>> I am Using Dell server Just as node, My manager is running on other
>>> machine. On each node we have 40 vm's running. and all most vm's has RHEL6
>>> os. Now the problem about performance of vm's, when client is writing the
>>> data in vm, they are reporting, that they have  very slow speed to write the
>>> data.
>>>
>>> I also feel slow performance at writing speed in the vm's, So now please
>>> suggest, is any way to improve the writing speed in virtual machine's ?.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Mon, Feb 17, 2014 at 2:40 PM, Dafna Ron <dron at redhat.com
>>> <mailto:dron at redhat.com>> wrote:
>>>
>>>     please give more information.
>>>     what do you mean by storage performance?
>>>     how many vm's are you running?
>>>     are you using the Dell as just a host or is engine also installed
>>>     on it?
>>>
>>>
>>>     On 02/17/2014 03:26 AM, Vishvendra Singh Chauhan wrote:
>>>
>>>         Hello Group,
>>>
>>>         Please help me out in storage issue in ovirt.
>>>
>>>
>>>         I am using Dell PowerEdge XD 720 servers, as node in Ovirt.
>>>         Every node has 24TB storage space, so i am using all this
>>>         space as the local storage in that.. But still i am facing the
>>>         problem in storgae performance. My guests os are very slow to
>>>         write the data.
>>>
>>>
>>>         So please give me, some tips using them i can increase the
>>>         performance in storage.
>>>
>>>
>>>
>>>         --         /*Thanks and Regards.*/
>>>         /*Vishvendra Singh Chauhan*/
>>>
>>>
>>>         _______________________________________________
>>>         Users mailing list
>>>         Users at ovirt.org <mailto:Users at ovirt.org>
>>>
>>>         http://lists.ovirt.org/mailman/listinfo/users
>>>
>>>
>>>
>>>     --     Dafna Ron
>>>
>>>
>>>
>>>
>>> --
>>> /*Thanks and Regards.*/
>>> /*Vishvendra Singh Chauhan*/
>>> /*(*//*RHC{SA,E,SS,VA}CC{NA,NP})*/
>>> /*+91-9711460593
>>> */
>>>
>>> http://linux-links.blogspot.in/
>>> God First Work Hard Success is Sure...
>>
>>
>>
>> --
>> Dafna Ron
>
>
>
>
> --
> Thanks and Regards.
> Vishvendra Singh Chauhan
> (RHC{SA,E,SS,VA}CC{NA,NP})
> +91-9711460593
> http://linux-links.blogspot.in/
> God First Work Hard Success is Sure...
>
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