RAC & Failsafe :: Downgrade 2 Node RAC 11.2.0.3 To Previous Version 11.2.0.2 On Test Environment

Aug 20, 2012

I wanted to downgrade our 2 node RAC 11.2.0.3 to previous version11.2.0.2 on our test environment, so i could prepare to upgrade production later.

I followed oracle documentation and issued

'/u01/app/11.2.0.3/grid/crs/install/rootcrs.pl -downgrade -oldcrshome /u01/app/11.2.0/grid -version 11.2.0.2.0'

and both nodes and manually removed file in upgraded oracle home (rm -r u01/app/11.2.0.3).

This seems to have caused havoc and ASM and srvctl are no working. lsinvemntory lsinventory still poitns to removed oracle 11.2.0.3

I tried to set

export ORACLE_HOME=$ORACLE_HOME
.oraenv
+ASM1
srvctl config ##n

srvctl config
PRCR-1119 : Failed to look up CRS resources of database type
PRCR-1115 : Failed to find entities of type resource that match filters (TYPE == ora.database.type) and contain attributes DB_UNIQUE_NAME,ORACLE_HOME,VERSION
Cannot communicate with crsd

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Jan 24, 2011

We have oracle database 10g(10.2.0.4) running on AIX 5.1. we have installed 2-node RAC on another server AIX 6.1 . Now we want to migrate our single node database to new 2-node rac environment. how we can move/migrate/cluster-aware our single node database to 2-node rac?

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RAC & Failsafe :: Test Environment - SAN Migration?

Feb 15, 2012

We have a RAC in a test environment.It's 2 nodes connecting to an IBM DS3512. The DS3512 has one pool of 8 hard disks (RAID10) which has been then sliced into logical drives:

2 x 1GB
then
2 * 400GB

I have been tasked with changing the current configuration as follow:

2 pools of 4HDs in a RAID10 configuration

Then from the first pool:
2 * 1GB
1 * 398GB

from 2nd pool:
1 * 400GB

What I intend to do:
1) shutdown
SQL> shutdown immediate;
./srvctl crs stop
2) backup
dd if=votingdisk of=voting_disk_backup
I already got backups of OCR in $CRS_HOME/cdata/crs/
3) Perform changes on SAN
4) recreate ocfs2 partitions
5) mount the disks to their folder.
6) recovery
recover voting from backup
recover ocr from backup
7) Turn service on again
./srvctl crs start
SQL> startup;

Would this scenario work. There can be some glitches like the disk names changing after the reconfiguration but I only need to modify fstab for that.

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Jul 10, 2012

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Sep 13, 2012

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Aug 29, 2012

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but i have given the sid as ORCL..

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Feb 8, 2013

I am having performance issues on a query in a production environment that I cannot replicate in our test environment. Our test environment is an import of production. Version information is:

Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bi
PL/SQL Release 10.2.0.3.0 - Production
CORE     10.2.0.3.0     Production
TNS for Solaris: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - ProductionWhen I run the query in test, I get the following results using TKPROF
[code]....

Misses in library cache during parse: 1
Optimizer mode: ALL_ROWSThis performance problem started a few weeks ago and the problem seems to be in the high number of consistent reads during fetch. The DBA tried restarting the instance and gathering fresh stats on the tables but that has not made a difference. Now he wants to export the tables, drop the schema and re-import.

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Jun 2, 2011

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Mar 29, 2012

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Feb 23, 2011

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Insert Statements Are Processing Slow In 2 Node Rac Environment

Jul 22, 2013

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Jul 22, 2013

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Jul 14, 2011

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Nov 16, 2011

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RAC & Failsafe :: Sap Backups From Node 207

Aug 11, 2011

I am having an issue when trying to run a backup from node 207...Initially When trying to run the backup I got this error.

scrbdefrmr207:orarer 54> brbackup -u / -c force -t online -m all -p initRER_online.sap
BR0051I BRBACKUP 7.00 (40)
BR0055I Start of database backup: begnlswy.anf 2011-08-11 21.29.08
BR0484I BRBACKUP log file: /oracle/RER/sapbackup/begnlswy.anf
BR0477I Oracle pfile /oracle/RER/102_64/dbs/initRER001.ora created from spfile /oracle/RER/102_64/dbs/spfileRER001.ora

BR0280I BRBACKUP time stamp: 2011-08-11 21.29.13
BR1351I Configuration of database services:
RER001 PREF: RER001 AVAIL:
RER002 PREF: RER002 AVAIL:
DVEBMGS50_scrbdefrmr207 PREF: RER001 AVAIL: RER002
DVEBMGS50_scrbdefrmr208 PREF: RER002 AVAIL: RER001
[code]....

I have many other rac servers and sids setup this way and they all work,,I can login to sqlplus and do any changes .. no issues going into sqlplus in node 207 and node 208..I have checked the directory i.e mesg and teh files are there ..

scrbdefrmr207:orarer 56> pwd
/oracle/RER/102_64/sqlplus/mesg
scrbdefrmr207:orarer 57> ls
cpyus.msb cpyus.msg sp1us.msb sp1us.msg sp2us.msb sp2us.msg

I think the message is decieving as it complains about oracle home and sp1<lang>.msb not found ,, when i tis there.I have also checked my env variables .. they all there i.e

scrbdefrmr207:orarer 58> env |grep ORA
dbms_type=ORA
ORACLE_SID=RER001
ORACLE_HOME=/oracle/RER/102_64
ORACLE_BASE=/oracle

scrbdefrmr207:orarer 59> env | grep LD_
LD_LIBRARY_PATH=/usr/sap/RER/SYS/exe/run:/oracle/RER/102_64/lib

I an run archives log backups perfectly.. So its only when its trying to connect into the db.

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Mar 11, 2013

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Jun 29, 2011

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Oct 11, 2011

I have 2 node 11gR2 RAC running on AIX 6.1, after I shutdown the database and restart crs using crsctl start crs, ASM instance comes back up but not the database and I had to start the database using srvctl, isn't that the database should come up when I start the crs?

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Sep 28, 2011

What could be the reason for Such Errors.?OCR Integrity was Successful on one node and on the cloned node it was failed.

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Nov 23, 2011

I have a production database with 2 node Physical RAC ENV on two separate machines , and we are going to enable audit trail parameter to DB values to capture all failed login attempts on a database.

we have done this on our testing ENV but dont know the procedure to deploy this steps on 2 node RAC ENV . I have done the below steps on our standalone testing ENV

1.Log in as SYS and connect with the SYSDBA privilege.
oUser Name: SYS
oPassword: Enter your password.
oConnect As: SYSDBA

2.To enable audit on DB use below command
SQL>alter system set audit_trail=DB scope=SPFILE;

3.Then restart the database.

4.After successful startup use the below command to capture log
SQL> audit create session whenever not successful;

steps to enable audit_trail to capture failed login attempts on two node RAC ENV.

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RAC & Failsafe :: Can Create Directory On Two Node Database

Feb 2, 2013

here we have san server and rac database two node database.i want to know how can i create directory on rac database. i know how to create directory on single database but i do not know how can i create directory on rac database.

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RAC & Failsafe :: ASM Instance Not Started On Node 2 In Clusterware

Jan 11, 2011

i am configuring asm on clusterware when i create instance on node1 and node 2 a message screen appear " Cant start asm instance on node 2)When i start asm instance manually on node 2 i found the below error in alert log file.

ORA-27508 IPC error sending a message
ORA-27300 OS system dependent operation:send msg failed with status: 101
ORA-27301 OS failure message: Network is unreachable
ORA-27302 failure occurred at: sskgxpsnd1

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Jun 15, 2011

during installtion of Oracle RAC 11g r1 on Linux using VMware server, all the pre cluster installation was successful, and root.sh on node 1 was successful too, but whenever I run the root.sh script on the second node I get error message "Failure at final check of oracle CRS stack. 10"

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RAC & Failsafe :: Services On Node Automatically Down After Few Minutes?

Jan 4, 2011

I have installed Oracle 10g RAC crs and asm on CentOS release 5.4. When I am rebooting the nodes and starting crs manually All the services on both nodes starting successfully.

---------------------------------------------------------
[oracle@rac1 ~]$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora....SM1.asm application ONLINE ONLINE rac1
ora....C1.lsnr application ONLINE ONLINE rac1
ora.rac1.gsd application ONLINE ONLINE rac1
ora.rac1.ons application ONLINE ONLINE rac1

[code].....

But After a Few time/min few services goes down automatically and its show something like

---------------------------------------------------------
[root@rac1 ~]# crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora....SM1.asm application ONLINE ONLINE rac1
ora....C1.lsnr application ONLINE UNKNOWN rac1
ora.rac1.gsd application ONLINE ONLINE rac1
ora.rac1.ons application ONLINE ONLINE rac1

[code].....

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May 30, 2013

I have few doubts in rac environment

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2. In Rac environment how to check how many sessions connected to particular node.

3)In Rac any node is evicted due to network failure then after we rebuild the network .Is there any steps to do manually to access the failure node after rebuilding the network or it will automatically available in cluster group which service is perform this activity.

4.While configuring cluster ware you choose voting disk and ocr disk location and which redundancy you will choose suppose if you go for normal redundancy how many disks you can select for each file either one or two?

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RAC & Failsafe :: Single Node - Online / Offline

Dec 5, 2012

I have implemented Rac One node with two machine(dbtest01,dbtest02) in 11.2.0.3 Redhat 5.3 one for online another one for offline. i have created TAF also.

dbtest01 is online and create one query
DECLARE
i number(36):=1;
begin
while(i<10000000)
loop
dbms_output.put_line(i);
i:=i+1;
end loop;
end;

i executed above query for test and i made relocate database using srvctl utility to dbtest02 machine.

session is relocated successfully with new session id...above query getting stop in 25000 itself. i want to make it continue that process..also i tried to find Omotion utility in all the path.. couldn't find it... where will it be.. i want to relocate all the session without losing work.

from application i am getting disconnect after relocation.. application server need to restart to get work again...

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