6 Replies Latest reply: Jun 4, 2013 1:48 AM by SAML. RSS

    High availabilty in OEM11g

    Ora_83
      Hi

      Regading OEM grid control 11g in standalone server.
      What is the easiest/best way to have high availability ?

      i.e
      I can replicate repository database with dataguard
      How about oms?
        • 1. Re: High availabilty in OEM11g
          Loc Nhan -Oracle
          Hi,

          Please have a look at the following doc, which shows how to set up/configure multiple OMS's for high availability.
          http://docs.oracle.com/cd/E11857_01/em.111/e16790/ha_multi_resource.htm#BABIECFI

          Regards,
          - Loc
          • 2. Re: High availabilty in OEM11g
            Ora_83
            Hi

            I dont have a cluster. Can I still setup multiple oms ?
            • 3. Re: High availabilty in OEM11g
              Smitha-Oracle
              You dont need a cluster. You can install an additional OMS pointing to the same repository to have an active-active configuration. Here two or more OMS instances are configured to serve the same application workload. These instances can reside on the same machine as the Repository Database machine(s) or on different machines.
              They are all active instances front-ended by a Server Load Balancer (SLB) router, which can redirect requests to any of the active OMS instances. Such a setup ensures that even if one of the OMS goes down, another OMS can serve the console / upload requests.
              For more details, refer to the doc link suggested by Loc earlier:

              http://docs.oracle.com/cd/E11857_01/em.111/e16790/ha_multi_resource.htm#BABIECFI

              Also see:
              Note 330072.1 - How To Configure Enterprise Manager for High Availability
              • 4. Re: High availabilty in OEM11g
                Ora_83
                thanks smnath.

                How about repository database ? I believe I need to setup standby database with dataguard on different host. Is that right ?


                Do I need to consider anything else apart from oms and repository database ?
                • 5. Re: High availabilty in OEM11g
                  Loc Nhan -Oracle
                  Ideally the standby database should be in a different location for better protection against a disaster. By the way, you can use EM to create a standby database. Also, make sure that your OMS's are in proximity of the repository to prevent performance issues due to network latency.

                  - Loc
                  • 6. Re: High availabilty in OEM11g
                    SAML.
                    Depend, for me OEM is not a business critical and I just put it in a VM so the HA feature is managed by the VM. However, you will have to careful as OEM is very chatty and any network disruption will cause a lot of alerts to go off.

                    For the proper HA feature for OEM is cluster database and additional OMS

                    SAM L.