Instance naming in rac 11gr2 question

I am installing 11.2.0.3 grid and database on AIX 61 platform. IN the past when building rac databases I have always picked a logical database name and then just let the instance name be derived from the database name...e.g. database_name= racdb instance_names= racdb1,racdb2.
This has worked perfectly in the past but now the manager I am working for would like the following...
database_name= orprod00 instance_names= ormockn1,ormockn2.
Is this possible when using dbca to create the rac database and instances? Also, is it a good idea to have the instance names different from the database name.
Thanks for any suggestions.

Is this possible when using dbca to create the rac database and instances? I don't know if the instance name is set when using dbca as I have always used the manual method but the database name is set at that time and I think instance name is as well using your naming convention. The instance name can always be changed afterwards. You set this when you export the ORACLE_SID and start the database. The instance name can be anything you want and does not need to relate to your database.
Also, is it a good idea to have the instance names different from the database name.Your naming convention is typically what is used as there is no confusion. All my database and instance names follow the same convention. ie [database_name][instance_number]
Why does your manager want different database and instance names. The database name of prod makes it pretty obvious it's a prod database, but instance name of "mock" doesn't make it obvious it's a prod database. In fact I would have assumed it's a mock database and not prod with that name.
Personally I think it's confusing having desperate instance and database names.

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Instance naming in RAC environment

DB version : 11.1.0.7
OS : AIX 6.1
It has been few months since i've installed a RAC DB.
After the GRID/CRS installation, while DB creation, when you specify the DB name in DBCA , say orcl, DBCA will automatically create instances orcl1 and orcl2,...
But in my new company, i've come across RAC environments where the Instance names of the DB is not like
DB Name: ORCL
instance 1: orcl1
instance 2: orcl2Rather it is like
-- From Node1
SQL> select name from v$database;
NAME
MKESCU
SQL> select instance_name from v$instance;
INSTANCE_NAME
mkes1uHow did they manage to do this?

Why would anyone want instances for a RAC DB :MKESCU to be named as
mkes1u
mkes2uIs it for any security purpose?
Isn't
mkescu1
mkescu2straightforward and easy to understand?

Using ZFS for Oracle RAC 11gR2 binaries

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We have following scenario,
Two Node Cluster: Oracle RAC 11Gr2 with Clusterware on Solaris 10
We want to keep Oracle & Clusterware binaries on ZFS mirror file system on each node locally and for Data files, FRA, Voting disks & OCR on shared SAN using ASM.
My question, is the above scenario certified by Oracle or can we keep Oracle binaries on ZFS...?
Will appreciate your input.
Thanks

Well my confusion started after reading this doc on oracle support:
Certification of Zeta File System (Zfs) On Solaris 10 for Oracle RDBMS [ID 403202.1]
"Oracle database 10gR2 (10.2.0.3 and higher patches), 11gR1 (11.1.0.6 and higher patches) and 11gR2 (11.2.0.1 and higher patches) are certified with Solaris 10 ZFS on Sparc 64-bit and Solaris x84-64. See Solaris ZFS_Best_Practices_Guide. This is for single instance ONLY. ZFS is currently not applicable to RAC and not Certified to use it as a shared filesystem."

ASM pfile lost in Oracle RAC 11gr2

Hello Gurus,
I am new to Oracle RAC 11gr2 and facing some issues. our spfile/pfile for asm instance is lost and I am not able to startup the asm instance.
Environment is as below:
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Enterprise Linux Server release 5.5 (Carthage)
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LRM-00109: could not open parameter file '/u01/app/oracle/product/11.2.0/db_1/dbs/init+ASM1.ora'
Is there any way to recover the spfile/pfile ?
Also getting following error while try to connect " sqlplus / as sysasm"
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SQL*Plus: Release 11.2.0.1.0 Production on Sun Mar 27 11:26:02 2011
Copyright (c) 1982, 2009, Oracle. All rights reserved.
ERROR:
ORA-01031: insufficient privileges
Enter user-name:
Thanks and Regards,

Hi,
Do we need to Set variable ORACLE_HOME properly (Grid Home) while starting RDBMS instance?
e.g ORACLE_HOME=/u01/app/11.2.0/grid*I recommend you set ORACLE_HOME properly for each Oracle Installation when you use SQLPLUS.
i.e: cat /etc/oratab
orcl:/u01/app/oracle/product/11.2.0/db_1
db10g:/u01/app/oracle/product/10.2.0/db_1
+ASM1:/u01/app/11.2.0/gridAlso you can startup/shutdown our database with SQLPLUS using ORACLE NET*, but it must be configured properly.
My recommendation <s>is always</s> use SRVCTL and CRSCTL to manage to your environment. Track all the process of initialization processes through the logs using ADRCI utility (only 11.1 or later).
When use SRVCTL or CRSCTL to manage I recomend you use (GRID HOME).
SQL> alter database open;
alter database open
ERROR at line 1:
ORA-16038: log 3 sequence# 1067 cannot be archived
ORA-19809: limit exceeded for recovery files
ORA-00312: online log 3 thread 2: '+FRA/yyy/onlinelog/group_3.259.738489481'
SQL>I give to you three options:
1° - Add more asmdisk on Diskgroup +FRA
2° - Make backup of all archivelog using RMAN and option delete input (i.e backup archivelog delete all input;)
3° - If this database is for TEST ONLY and you not need backup or recovery of then you can delete all archivelog using RMAN (i.e delete archivelog all;)
I recommend you create routine of backups of the database and archivelog to prevent this area becomes exhausted.
If you need the database in archivelog but it is only to test then create routine to delete archivelogs periodically.
If you dont need the database in archivelog, then just disable it.
Regards,
Levi Pereira

Easy ORACLE RAC 11g question....

Hi everyone.....
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Its 11g compatible to run 10g instances?

Your instance is mapped with oracle database. You installed oracle software first then create a database.
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How to migrate DB from single node 10gR2 to RAC 11gR2 on diff platform?

How to migrate DB from single node 10gR2 to RAC 11gR2 on different platform with possible minimum downtime? We have a situation of upgrade/migrate oracle 10gR2 single instance DB to 2-node RAC 11gR. The source OS is Solaris 10 on SPARC and the target OS is Linux (the target servers could be changed to Solaris 11 x86 if needed). What is the best solution on that?
Thanks,

Technically, can do the following for upgrading and migration?
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Best Practice for monitoring RAC 11gR2

Hi,
I have RAC 11gR2+ASM on two nodes.
I would like to get your advice what are the most critical things i should monitor - Regarding RAC COMPONENCTS
Thanks

Hi,
here i am mentioning some basic monitoring
1)interconnect switch is working properly or not(private network)
2) check which instances are running on which nodes
3) check if ASM,listeners,nodeapps,gsd,vip..... are running or not.
Each instance carrying planned load (balanced?).
– Shared storage access is equal.
– Interconnect Load
-Latency
– High CPU usage - Oracle processes getting enough resources.?
Thanks

Oracle rac 11gr2 + sga

Hi all,
I have a 2 nodes rac 11GR2 on linux redhat with 12Go RAM each one.
Since 15 days, a dba add more memory on each node (+ 24Go RAM) and modify SGA like :
On each node :
create a pfile from spfile, modify memory_max_target on pfile (from 7Go to 8Go), and restart each instance from this pfile.
Now, the problem are :
Each node consume 36Go of 36Go RAM,
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Problem 1: Why is that a problem? How did you establish 36 Gb is used. The Unix tools are notoriously for providing incorrect information as the SGA is accounted for in every process.
Problem 2: Evidently the "DBA' used an incorrect procedure to change these parameters, and didn't convert the pfile to spfile again, and started using the 'startup pfile' command.
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ORA-00354, ORA-00353 on RAC 11gR2

Hello All,
I have a database Oracle RAC 11gR2 on OEL linux 5.5 32bit.
When i am trying startup my database I am facing the below errors: this error is occuring on the startup of any node
ERROR at line 1:
ORA-00354: corrupt redo log block header
ORA-00353: log corruption near block 2651 change 1172351 time 10/12/2011
13:22:43
ORA-00312: online log 1 thread 1: '+DATA/orcl/onlinelog/group_1.261.761845161'It seems that my online redo log is corrupted. how can i solve that ?
knowing that my database is running in NOARCHIVELOG mode and i do not have any backup.
and why i am not able to start up any of the nodes? redo logs is not related to each node seperately ?
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Regards,
Edited by: NB on Oct 13, 2011 5:12 PM

since my database is runing in NOARCHIVELOG mode and i have no backups and the current is logfile was the corrupted one and my database was not starting.
I solved that by ceating a pfile and adding the : allowresetlogs_corruption=TRUE
regards,

Steps to stop / start CRS & ASM in RAC 11gr2

Hello Gurus,
Environment is as below:
RAC 2 nodes
Oracle RAC 11gr2
Enterprise Linux Server release 5.5 (Carthage)
I am new to Oracle RAC 11gr2 and facing some issues while stop / start crs & asm.
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Thanks and Regards,

In 11gr2, gsd remains offline. When I had checked with metalink, they said that it is fine.
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<CRS_HOME>/bin/crsctl start has - it should bring all resources automatically
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Error while deleting instance in 10g RAC

Hi,
I am trying to delete an instance in node 3 using DBCA. I am in node 2 and when I give username and password (Instance Management --> Delete Instance) i get the following error
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Connection to the database failed. Please make sure that service "xxxxxx" is registered with the listener. Username Sys has SYSDBA privleges, password is correct and then try again."
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Please provide suggestions...Its urgent.

Hello,
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Regards

How to restore a single instance database to RAC (10g) using RMAN ?

Hi all,
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System: Windows 2003
Oracle 10g R2
Thanks.
Wander(Brazil)

Wander(Brazil) wrote:
Hi all,
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Which file decide instance name in RAC 10g ?

Which file decide instance name in RAC 10g ?
How does RAC know which instance should start from which machine?
Thanks.

The spfile is NOT the correct answer, actually.
1. The instance name for any Oracle instance, whether in a RAC or not, is derived from the value for the ORACLE_SID parameter which is in force at the time the startup command is issued. If you were to:
export ORACLE_SID=SALES
sqlplus / as sysdba
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Hi All.
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Instance naming in rac 11gr2 question

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