In a Nutshell
Extended Oracle RAC configurations are very special within the clustering technologies, with the member nodes spread across geographic locations. The “speed of light” factor plays the most important role in the latency between member nodes and puts a practical limitation on the distance between the nodes. Approximately 1 millisecond of latency is introduced for every 50 miles, which limits the extended clusters to being less than a few hundred miles apart.
Mirroring the storage for extended Oracle RAC can be done using two methods: host mirroring and storage mirroring. Oracle ASM uses the host-mirroring approach, and storage vendors use storage-mirroring techniques. The newly introduced ASM preferred read feature takes advantage ...
Get Oracle Database 11g Oracle Real Application Clusters Handbook, 2nd Edition, 2nd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
