Oracle Parallel Server Architecture
An Oracle parallel or cluster database consists of two or more physical servers (nodes) that host their own Oracle instances and share a disk array. Each node’s instance of Oracle has its own System Global Area (SGA) and its own redolog files, but the data files and control files are common to all instances. Data files and control files are concurrently read and written by all instances; however, redologs can be read by any instance but written to only by the owning instance. Some parameters, such as db_block_buffers and log_buffer, can be configured differently in each instance, but other parameters must be consistent across all instances. Each cluster node has its own set of background processes, just as ...
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.
