How to start CRS when the private interconnect's netmask has changed. This HowTo will describe how to update the OLR with the new netmask.
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How to recreate a lost OCR ASM disk group from scratch. This HowTo applies to Database 12c RAC. We will rebuild the disk group, restore the OCR, replace the voting disks, and recreate the ASM parameter and password files.
This HowTo demonstrates migrating a RAC cluster to Flex ASM from 'traditional' ASM.
The prerequisites are that the OCR files, ASM parameter file and ASM password file are stored in an ASM disk group with asm.compatible set to at least 12.1. We will confirm the ASM cluster mode before we begin and after we have finished.
Oracle Database 12c Release 1 fully supports IPv6. Here is how to add IPv6 support to VIPs and SCANs in a 12c RAC cluster. The VIPs, SCANs and their listeners will support both IPv4 and IPv6 and addresses from both families will relocate between RAC nodes as normal. It is only assumed that the servers already have a host IPv6 address assigned via auto-configuration.
You may have a small RAC database that is managed with the dbconsole rather than the grid. The documentation states that the console must be started manually on the applicable cluster node(s) whenever it is required. Couldn't the CRS cluster start and stop the dbconsole automatically?
Oracle Database 11g Release 2 has a new feature named server pools. If a database is created as a policy managed RAC database then policy will dictate where the database instances are placed in the cluster rather than which instances were created on which node at creation time.
Take a cluster of three nodes.
This brief HOWTO is based on the excellent article from Oracle detailing how to build a RAC cluster on GNU/Linux using ASM as the storage medium. It also pulls some information from this other great article though I used an iSCSI SAN for shared storage.
It is assumed that the Etch distribution of Debian GNU/Linux is used. The Linux kernel that this was tested on was version 2.6.18-4-686.