Platform : IBMAIX 6.1

GRID and RDBMS version : Oracle 11gR2

Pre-req steps:

1) Ensure all required /etc/hosts entries are done on all nodes for private IP , Public IP , VIP and Scan IPs (with required scan_name).

2) Create dba group on all RAC nodes with same uid.

3) Create oracle group on all RAC nodes with same gid.

4) Set ulimit (shell limits) to unlimited for all parameters.

5) Ensure following IPS are available before starting RAC installation.

a) Public IP (Pingable)

b) Private IP (Pingable)

c) Virtual IP (not pingable before installation)

d) 3 Scan IPs (not pingable before installation)

6) Set following OS parameters. Run below commands as root.

/usr/sbin/no -p -o udp_sendspace=65536

/usr/sbin/no -p -o udp_recvspace=655360

/usr/sbin/no -p -o tcp_sendspace=65536

/usr/sbin/no -p -o tcp_recvspace=65536

/usr/sbin/no -p -o rfc1323=1

/usr/sbin/no -p -o sb_max=4194304

7) Ensure oracle user has following capabilities.

CAP_NUMA_ATTACH,CAP_BYPASS_RAC_VMM,CAP_PROPAGATE

If not , user below command as root to add the capabilities

/usr/bin/chuser capabilities=CAP_NUMA_ATTACH,CAP_BYPASS_RAC_VMM,CAP_PROPAGATE oracle

8) Ensure ASM storage disks are available and accesible from both the nodes.

9) Create grid home directory structure and RDBMS home directory structure for grid and oracle binaries.

10) Run rootpre.sh on server if you are installing oracle first time on this server.

11) Ensure sufficient RAM and SWAP is available on the server.

12) Enable password less authentication between RAC servers as oracle user.

13) Ensure following filesets are installed on the server.

bos.adt.base

bos.adt.lib

bos.adt.libm

bos.perf.libperfstat

bos.perf.perfstat

bos.perf.proctools

14) Update UDO and TCP ephemeral port range using following commands as root.

# /usr/sbin/no -p -o tcp_ephemeral_low=9000 -o tcp_ephemeral_high=65500

# /usr/sbin/no -p -o udp_ephemeral_low=9000 -o udp_ephemeral_high=65500

15) Configuring SSH LoginGraceTime Parameter for AIX

VI /etc/ssh/sshd_config and change LoginGraceTime from 2 to 0.

Restart ssh service.

16) Configure following limits in /etc/security/limits

Maximum number of open file descriptors nofile = -1 (unlimited)

Maximum number of processes available to a singleuser maxuproc = 16384

(command: /usr/sbin/chdev -l sys0 -a maxuproc=16384)

Maximum size of the stack segment of the process stack = -1 (unlimited)

17) Stage grid software and start installation using runinstaller.

s/w avialable at : 10.87.164.19:/oracle/sw/grid

RDBMS s/w avialable at : 10.87.164.19:/oracle/sw/grid

18) Refer following steps.

Ensure “udp_sendspace” is set to 65536 on both the nodes.

Use command no -o udp_sendspace

If not, use following command to set it.

no –p -o udp_sendspace=65536

Now run root scripts one by one as shown in above screenshot.

Refer Metalink Note 1280234.1 for details.

/usr/sbin/no -p -o udp_sendspace=65536

/usr/sbin/no -p -o udp_recvspace=655360

/usr/sbin/no -p -o tcp_sendspace=65536

/usr/sbin/no -p -o tcp_recvspace=65536

/usr/sbin/no -p -o rfc1323=1

/usr/sbin/no -p -o sb_max=4194304

/usr/sbin/no -p -o ipqmaxlen=512

Press “OK” on installer.

This is due to SCAN IPS are not registered in DNS.

Check install log file at $ORACLE_BASE/oraInventory/logs/installActions{$TIMESTAMP}.log

Refer Metalink Note : ID 887471.1

Press OK and next.

Press yes.

Press Close.

Check cluster status on both the nodes.

Install Database now. Execute runInstaller from RDBMS stage s/w.

Before you create ASM diskgroup, ensure ASM diskstring is set. Use below command by logging into ASM instance.

alter system set asm_diskstring = '/dev/*MIS*' scope=both;

You need to create required ASM diskgroups before DB creation. These diskgroups will be used to store redo,control,archives,temp files,dbf files etc.

You can connect to asm instance using “sqlplus / as sysasm” and run following command to create diskgroup.

All above Passwords are set to : Abcd1234