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From Murali Reddy <>
Subject Re: [DISCUSS] Global Server Load Balancing (GSLB) FS & Design Document
Date Fri, 11 Jan 2013 09:02:28 GMT
On 11/01/13 2:55 AM, "Chiradeep Vittal" <>

>Thanks for the detailed and enlightening write-up*.
>I feel that the GSLB service is not a NetworkElement.
>NetworkElements are those that participate in the L2/L3 orchestration of
>GSLB providers do not do this.

Thanks for the review Chiradeep. Sure, GSLB service, is indeed cross-zone
service, does not fit in to NetWorkElement model. I will by-pass using
NetWorkElement, and let GSLB orchestration send commands directly to agent
representing the GSLB provider.

>It does not even participate in the existing Loadbalancer workflow.
>In fact I would assert that this is a completely different higher-level
>orchestration workflow that should not need to touch network elements or
>the network manager.
>You could even write this feature by orchestrating it using the end-user

Agreed. GSLB orchestration need not be part of network manager, I will
restrict it to service layer.

I will update the spec and get back.

>*A lot of folks strive to format the document according to the template
>but the template is just to make sure that vital information is not
>missed. What ends up happening is that there's a lot of information, but
>incoherently organized. Nice job.
>On 1/8/13 12:52 PM, "Murali Reddy" <> wrote:
>>In continuation to my proposal [1], I am brining GSLB support
>>separately for discussion. I have put up functional specification and
>>design documentation at [2]. Please provide feedback, comments.
>>Quick abstract of the feature:
>>Today CloudStack supports load balancing traffic across the VM instances
>>with in a zone. In case of multi-zone clouds, users can launch service
>>across one or more zones for high availability and disaster recovery.
>>is set of technologies that are used to load balance traffic across
>>multiple location and also provides disaster recovery. With this feature
>>CloudStack would be able to orchestrate setting up load balancing across
>>multiple zones and also provide disaster recovery solution in case of
>>multiple zone clouds.

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