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From Felix Lee <fe...@twgrid.org>
Subject Re: Poor performance with open nebula driver
Date Mon, 25 Jun 2012 10:50:32 GMT
Hi Francesco,
Thanks for your reply, alright, I get it. :)

Best regards,
Felix Lee ~

On 06/25/2012 06:00 PM, Francesco Vollero wrote:
> Hello Felix,
>
> firstly, thanks for your email we would more than happy to change it,
> but the opennebula driver is managed by OpenNebula guys, so surely
> they're looking at this mail and they will be more than happy to fix
> the issue.
>
> Obviously, if you want, you can send a patch if you think would solve
> the issue and if match the criteria will be accepted :)
>
> Cheers,
> Francesco Vollero
>
> On Mon, Jun 25, 2012 at 5:29 AM, Felix Lee <felix@twgrid.org> wrote:
>> Dear All,
>> I am new with deltacloud, for integration requirement, we are evaluating
>> deltacloud solution.
>> Here, I don't know if anybody ever reported this issue, however, recently, I
>> noticed deltacloud is in poor performance with our open nebula instance.
>> Usually, our opennebula always runs over 500 VM instances, and while we use
>> deltacloud to query instances, it will take pretty long time to get all
>> results.
>>
>>
>> Here are some examples:
>>
>> With "deltacloudc instances" command:
>>
>> real    20m19.293s
>> user    0m7.842s
>> sys     0m0.681s
>>
>>
>> With curl to deltacloud rest api "/api/instances":
>> real    4m35.891s
>> user    0m0.002s
>> sys     0m0.005s
>>
>> With curl to opennebula OCCI interface "/compute" directly via the same
>> host:
>> real    0m1.249s
>> user    0m0.001s
>> sys     0m0.006s
>>
>>
>> It seems to me that the REXML will be the performance bottleneck in
>> opennebula_driver, so, would you consider to replace it by another one?
>>
>>
>>
>> BTW, I am using following deltacloud version:
>> deltacloud-client (0.5.0)
>> deltacloud-core (1.0.0)
>>
>>
>> And my ruby version is 1.9.3p194.
>> OS is Scientific Linux 5.8 with 2.6.18-308.8.2.el5 kernel.
>>
>>
>> Best regards,
>> Felix Lee ~
>> --
>> Felix Lee                               Academia Sinica Grid & Cloud.
>> Tel: +886-2-27898308
>> Office: Room P111, Institute of Physics, 128 Academia Road, Section 2,
>> Nankang, Taipei 115, Taiwan

-- 
Felix Lee                               Academia Sinica Grid & Cloud.
Tel: +886-2-27898308
Office: Room P111, Institute of Physics, 128 Academia Road, Section 2, 
Nankang, Taipei 115, Taiwan



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