If certified Network-attached Storage (NAS) is used for Oracle RAC and this storage is connected through Ethernet-based networks, then you must have a third network interface for NAS I/O. Failing to provide three separate interfaces in this case can cause performance and stability problems under load. Redundant interconnect usage cannot protect network adapters used for public communication. If you require high availability or load balancing for public adapters, then use a third party solution. Typically, bonding, trunking or similar technologies can be used for this purpose. You can enable redundant interconnect usage for the private network by selecting multiple network adapters to use as private adapters. Redundant interconnect usage creates a redundant interconnect when you identify more than one network adapter as private. Chapter 5 Network Interface Configuration Options 5-25
Multiple Private Interconnects and Oracle Linux Review this information for settings for the rp_filter parameter for Oracle RAC systems that use multiple NICs for the private interconnect. With Oracle Linux kernel 2.6.31, which also includes Oracle Unbreakable Enterprise Kernel 2.6.32, a bug has been fixed in the Reverse Path Filtering. As a consequence of this correction, Oracle RAC systems that use multiple NICs for the private interconnect now require specific settings for the rp_filter parameter. This requirement also applies to all Exadata systems that are running Linux kernel 2.6.32 and above. Without these rp_filter parameter settings systems, interconnect packets can be blocked or discarded. The rp_filter values set the Reverse Path filter to no filtering (0), to strict filtering (1), or to loose filtering (2). Set the rp_filter value for the private interconnects to either 0 or 2. Setting the private interconnect NIC to 1 can cause connection issues on the private interconnect. It is not considered unsafe to disable or relax this filtering, because the private interconnect should be on a private and isolated network. For example, where eth1 and eth2 are the private interconnect NICs, and eth0 is the public network NIC, set the rp_filter of the private address to 2 (loose filtering), the public address to 1 (strict filtering), using the following entries in /etc/sysctl.conf : net.ipv4.conf.eth2.rp_filter = 2 net.ipv4.conf.eth1.rp_filter = 2 net.ipv4.conf.eth0.rp_filter = 1 See Also: for more information about rp_filter for multiple private interconnects and Linux Kernel 2.6.32+ Chapter 5 Multiple Private Interconnects and Oracle Linux 5-26
6 Configuring Users, Groups and Environments for Oracle Grid Infrastructure and Oracle Database Before installation, create operating system groups and users, and configure user environments.
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- Spring '09
- Jane Smith
- Oracle Database, Oracle Corporation, Oracle software, Oracle RAC, Oracle Grid Infrastructure