数据库高可用解决方案PPT27页.pptVIP

* MS and IBM are late to the HA game - they have been, and are still, dependent on storage/system/OS solutions to enhance their database HA, and that strategy doesnt really scale and by definition is functionally limited. * Integrated Clusterware Management Oracle RAC 10g offers a complete, integrated clusterware management solution on all platforms Oracle Database 10g runs on. This clusterware functionality includes mechanisms for cluster connectivity, messaging and locking, cluster control and recovery, and a services provisioning framework (discussed below). No 3rd party clusterware management software need be purchased. Oracle will, however, continue to support select 3rd party clusterware products on specified platforms. Integrated clusterware management in Oracle RAC 10g offers the following benefits: Low cost. Oracle does not charge extra for this capability. Single-vendor support. No finger pointing is possible. Simpler installation, configuration and ongoing maintenance. The Oracle RAC 10g clusterware functionality is installed, configured and maintained using standard Oracle Database management tools. No extra integration steps are necessary. Consistent high quality across all platforms. Oracle is able to perform much more intensive testing of new software releases than is possible with 3rd party products. Consistent functionality across all platforms. For example, some 3rd party clusterware products limit the number of nodes that can be supported within a cluster. With Oracle RAC 10g, up to 64 nodes are supported on all platforms. Users can also expect a consistent response across all platforms to high availability challenges such as server node failures, interconnect failures, I/O fencing behaviors, and more. Support for advanced functionality. This includes integrated monitoring and notification capabilities to enable fast, coordinated recovery across both database and application tiers in case of failure (See “Fast Connection Fail-Over”