Clarity

  • Private Community
Back to discussions
Expand all | Collapse all

Does anyone know if there is a clever way to get CA PPM beacon service communicating between app servers in Azure?  ...multicast isn't supported, but I saw some workarounds for Oracle RAC using multicast, so there may be a way.

  • 1.  Does anyone know if there is a clever way to get CA PPM beacon service communicating between app servers in Azure?  ...multicast isn't supported, but I saw some workarounds for Oracle RAC using multicast, so there may be a way.

    Posted Jun 01, 2017 11:27 AM

    ...wondering if anyone has tried to get multicast working with two clarity app servers in AWS/Azure.  ....Azure doesn't support multicast, but I'm not sure Clarity uses multicast in the same way apps like Oracle RAC do.



  • 2.  Re: Does anyone know if there is a clever way to get CA PPM beacon service communicating between app servers in Azure?  ...multicast isn't supported, but I saw some workarounds for Oracle RAC using multicast, so there may be a way.
    Best Answer

    Posted Jun 09, 2017 10:33 PM

    Multicast is not just for beacons and app servers in a cluster, but even for communication between app and bg in a single server system.

     

    I wasn't aware of this with Azure, but it looks like it's a no-go for the time being.

     

    Multicast is something that has to be supported at the network level in order for it to work.

     

    PPM will either need to switch from using jgroups over multicast to something else, or undergo a change of the jgroups configuration and implementation to use a different (e.g. unicast) mechanism.  These are things that require an engineering change to be supported and should be raised as an Idea that perhaps just targets the Azure requirement, listing the multicast limitation as one of the known obstacles.