Storage Foundation for Oracle® RAC 7.3.1 Administrator's Guide - Linux
- Section I. SF Oracle RAC concepts and administration
- Overview of Storage Foundation for Oracle RAC
- About Storage Foundation for Oracle RAC
- Component products and processes of SF Oracle RAC
- About Virtual Business Services
- Administering SF Oracle RAC and its components
- Administering SF Oracle RAC
- Starting or stopping SF Oracle RAC on each node
- Administering VCS
- Administering I/O fencing
- About the vxfentsthdw utility
- Testing the coordinator disk group using the -c option of vxfentsthdw
- About the vxfenadm utility
- About the vxfenclearpre utility
- About the vxfenswap utility
- Administering the CP server
- Administering CFS
- Administering CVM
- Changing the CVM master manually
- Administering Flexible Storage Sharing
- Backing up and restoring disk group configuration data
- Administering SF Oracle RAC global clusters
- Administering SF Oracle RAC
- Overview of Storage Foundation for Oracle RAC
- Section II. Performance and troubleshooting
- Troubleshooting SF Oracle RAC
- About troubleshooting SF Oracle RAC
- Troubleshooting I/O fencing
- Fencing startup reports preexisting split-brain
- Troubleshooting CP server
- Troubleshooting server-based fencing on the SF Oracle RAC cluster nodes
- Issues during online migration of coordination points
- Troubleshooting Cluster Volume Manager in SF Oracle RAC clusters
- Troubleshooting CFS
- Troubleshooting interconnects
- Troubleshooting Oracle
- Troubleshooting ODM in SF Oracle RAC clusters
- Prevention and recovery strategies
- Tunable parameters
- Troubleshooting SF Oracle RAC
- Section III. Reference
Enhancing the performance of SF Oracle RAC clusters
The main components of clustering that impact the performance of an SF Oracle RAC cluster are:
Kernel components, specifically LLT and GAB
VCS engine (had)
VCS agents
Each VCS agent process has two components - the agent framework and the agent functions. The agent framework provides common functionality, such as communication with the HAD, multithreading for multiple resources, scheduling threads, and invoking functions. Agent functions implement functionality that is particular to an agent.
For various options provided by the clustering components to monitor and enhance performance, see the chapter "VCS performance considerations" in the Cluster Server Administrator's Guide.
Veritas Volume Manager can improve system performance by optimizing the layout of data storage on the available hardware.
For more information on tuning Veritas Volume Manager for better performance, see the chapter "Performance monitoring and tuning" in the Veritas Storage Foundation Administrator's Guide.
Volume Replicator Advisor (VRAdvisor) is a planning tool that helps you determine an optimum Volume Replicator (VVR) configuration.
For installing VRAdvisor and evaluating various parameters using the data collection and data analysis process, see the Veritas InfoScale Replication Administrator's Guide.
Mounting a snapshot file system for backups increases the load on the system as it involves high resource consumption to perform copy-on-writes and to read data blocks from the snapshot. In such situations, cluster snapshots can be used to do off-host backups. Off-host backups reduce the load of a backup application from the primary server. Overhead from remote snapshots is small when compared to overall snapshot overhead. Therefore, running a backup application by mounting a snapshot from a relatively less loaded node is beneficial to overall cluster performance.