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julien_21453
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Aug 31, 2011

GTM with LTM performance

Hi everybody,

 

 

I'm planning to implement GTM on a Datacenter and I want to have your feedback about this technology. I have already installed LTM but not GTM.

 

What is the best practice for implementing GTM and LTM ? Using a dedicated appliance is better (but more expensive) ? Can we have LTM and GTM on the same appliance with HA ? Does the performance is reduced when we use LTM and GTM together?

 

 

Thank you in advance for all your answer.

 

 

julian

 

3 Replies

  • Hi Julian,

     

    I can only speak to my experience but here is what I think is the best practice for the GTM and LTM

     

     

    That being said, the only real advantage to warrant a GTM is if you have two or more data centers that hosts applications using a single domain name(s).

     

     

    Now that we got that out of the way let me answer some of you basic questions first

     

     

    Q: Is it better to use a dedicated appliance or integrated with the LTM?

     

    A: The best practice is to physically separate the LTM and GTM because

     

    1) Redundancy - scale beyond the 2 unit appliance

     

    2) Reach-ability - If hosted on the same appliance or Virtual M your clients might not be able to reach the GTM to do resolution.

     

    3) Serviceability - Separated you can perform independent upgrades or fixes.

     

    Otherwise you can host it just fine on the same appliance or same VM

     

     

    Q: Can we have LTM and GTM on the same appliance with HA?

     

    A: Yes you can without an issue.

     

     

    Q: Does the performance is reduced when we use LTM and GTM together?

     

    A: All the Appliances are sized to handle the GTM so the short answer is no. The longer answer is: depends. This is because they are sharing the same resources on a single appliance so they are prone to the same types of performance issues as any other application running on the same device.

     

     

    I hope this answers some of your questions

     

     

    Bhattman
  • Some additional thoughts on GTM on LTM or GTM as a standalone:

     

     

    http://devcentral.f5.com/Community/GroupDetails/tabid/1082223/aff/31/afv/topic/aft/1184625/afc/1258295/Default.aspx

     

     

    Aaron
  • Thank you for your answers bhattman, it is clearer now.

     

    And thank you hoolio for the other topic's link.

     

     

    Julian