11gR2 RAC New Features
> ASM has been integrated with clusterware binaries i.e:grid
>Oracle has rearchitected grid infrastuructures in to two stacks
1.Oracle High Availability Service stack
2.Cluster Ready Service Stack
>We cannot place OCR and Voting File in raw partitions (we can place in asm diskgroups).
>CTSS has been introduced to synchronize data and time.
>Oracle has introduced scan name and scan ip’s SCAN NAME and SCAN IP’S can be placed
either in /etc/hosts or DNS Server.
NOTE: IF SCAN IPS’S are placed in /etc/hosts only one scan ip will be enabled
.If placed in DNS all three will be enabled
>SSH Configuration is automated
>we can start and stop all nodes in the cluster with a single command.
>Oracle has introduced SCAN LISTENER ,for every SCAN IP, it creates one scan VIP
and one scan listener.