Date(s) - 27/10/2011
12:00 am UTC
This introductory level session aims at providing an overview of Oracle High Availability options to users of traditional single instance Oracle deployments who are interested in ways to make their database more highly available. Starting with single instance Oracle the discussion begins with addressing single points of failure in a Unix server. Virtualisation can be another step to making server failures transparent to the users. A different approach to virtualisation is the use of active passive clusters. These have been the traditional domain of established vendors such as IBM with Power HA and Veritas with their Veritas Cluster Suite. Interestingly much of their functionality can now be implemented with Oracle Clusterware/Grid Infrastructure as well at no extra cost. The next step on the high availability ladder is the active/active cluster, for which one finds only very few implementations in the field. Oracle’s Real Application Cluster is probably the most widely spread. RAC can be configured locally on one data centre, or extend to more than one data centre which is probably the pinnacle of RAC deployment. Both of the setups are going to be explored during the presentation.The discussion ends with a necessary view on disaster recovery strategies, both block-level oriented (EMC SRDF, HP CA etc) as well as Data Guard. Time permitting we will touch on replication technologies as well.