RAC & Failsafe :: How To Prevent VIP Transfer Back To Its Original Node Location
Nov 11, 2012
Normally if node fails, VIP & resources are transferred to another node (clients need to failover).
if node is back again CRS detect this, make it as 'family member' and try transfer VIP & resources back to this node (clients will force to failover again).
this failover (despite of failover method I use) make each uncommitted transaction to be rolled back. client need to be disconnected from the service and VIP through they are connected to this service and they need reconnect to the new node - during this stage all DMLs modifications are gone, and need to be re execute.
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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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Sep 13, 2012
I would like get more details about single node RAC.. What is single Node RAC?..
1). just configure only one server instead of two node... same RAC installation.. cluster installation and shared disk configuration in single server itself.. in future we can add node to this ...
2). in 11gR2 having new feature Single Node RAC.. Multiple instances running on same node and configure using Cluster...
is there any advantage using single node rac(other than online upgrade to full RAC).
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Apr 10, 2012
I have a 3 node RAC server on Windows Server 2008. Last week the hard drive went out on one of the nodes and I have had to rebuild as I could not recover anything.
I went through and deleted the old node and now I have just finished adding the new node back to my cluster via documentation. Once I created the new instance on that server DBCA attempted to start and it failed gaving me a crs error. I found out later that the other 2 nodes went down and the new one that did not start correctly was the only one up!! I went and stopped the new instance and restarted the first 2. The associated services did not start with the instance so I had to start each manually. The trace files show an ORA-29702 error with cluster group service and the instance being stopped on both of the existing nodes. No other error messages stood out.
Now I cannot get any crs services to start on that 3rd node even if I attempt to start manually. I have also tried stopping all and restarting and that does not work. I found another post on this forum from you and followed it. The ASM service was fine the entire time through all the logs and I don't know how to verify LMON in Windows but I didn't see any LMON errors in the alert log. Also, the voting disks are online. Each node has their own and they are mirrored. Where else to look?
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Mar 21, 2012
I would like to implement Oracle RAC with 2 nodes for SE Licence. I did a lot when both this nodes with 3 NICs each were plugged at the same switch. Now I have a need to construct a RAC when two nodes will be in separate locations, abot 4 miles from each one. What should I explain to our network administrator he needs to do to implement this solution? I've been told that they can do a FO channel to each location. But don't have exact clear explicaton.
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Nov 4, 2011
Tell me that in Oracle 11g, information regarding voting disk location is stored in which file ?
I know that we can use "crsctl query css votedisk" to see the location of voting disk, but from which file or place this command pick the information ?
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Jul 14, 2011
I have 2 node 11gR1 running on Unix, I want to add 3 more RAC node to it. What are all the steps involved and should I first add 3rd node and then the 4th node or I should add both at the same time? is there any difference between these two methods?
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Nov 16, 2011
I need to change Virtual IP for one of my RAC node as it is conflicting with another server's IP.
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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
How to find out which node is master node in oracle 9i RAC database.
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Jun 29, 2011
In case of RAC the node which is up first is master node.
In case of 4 nodes RAC master node itself is down then how to identify which node is master node out of serving nodes
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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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Feb 7, 2013
Can a server (node) have more than one databases in RAC environment?
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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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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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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
1.In 2 node rac while adding datafile to tablespace if you forget to mention '+'then what will happen whether it is going to be create or it throws an error if it creates where exactly located and other node users how to work on that tablespace .what all steps to perform that datafile is useful for all node users.
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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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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Aug 17, 2012
We have 5 node RAC database. I want to user 2 node for OLTP and 3 for DSS system. Guide now to create service for the requirement.
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May 23, 2012
we encounter a problem with a 2-nodes RAC with 11gR2 SE : Database RAC is correctly running but we encounter problems using RAC TNS entry, obtaining the message ORA-01033.We can access to the DB using a TNS entry using each one of IP addresses but when we use the SCAN address, it fails. 2 weeks ago RAC2 node could connect perfectly with the SCAN address but RAC1 (used as a client) obtained error message almost 30% of tries.
We made a reboot of RAC1 node and now SCAN address works correctly from RAC1 and RAC2 (used as a client) fails systematically with SCAN address but works perfectly with direct access to the database.On both nodes, SCAN address is perfectly resolved by DNS server, cluster seems correct, listeners seems correct...We have opened an SR on Metalink 4 weeks ago but we don't progress.
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Mar 27, 2013
I am configuring two node RAC on oracle virtual box. Did its mandatory to configure DNS on both nodes before Rac installation? Whats the purpose of DNS in RAC. And if its mandatory did i have to configure DNS on each node separately?
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Apr 17, 2012
I have the following problem on a 10.2.0.4 Oracle on AIX 1.6...
I have 2 RAC nodes as the node # 2 goes down, the VIP migrated correctly to the node # 1, but the listener # 1 do not see the change, and just resolve to the local ip.
The same does not apply in the reverse case, when it drops the node N 1, the listener attends to the fallen VIP node and migrated.The configuration is correct and identical in both nodes, according to the documentation, but I can not find a reasonable answer.
IP node # 1.
scm1or01 192.68.60.11
scm1or01-VIP 192.68.60.13
IP node # 2
scm1or02 192.168.60.12
scm1or01-VIP 192.168.60.14
Below I write as I detect the problem: when scm1or02 is down:
scm1or01:/cots/oracle/app/oracle/product/10.2.0/db_1/network/admin> lsnrctl status
LSNRCTL for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Production on 11-APR-2012 19:56:46
Copyright © 1991, 2007, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
[code]...
Also the listener.ora in scm1or01 starts how LISTENER, but the crsstat says:
scm1or01:/cots/oracle/app/oracle/product/10.2.0/db_1/network/admin>crsstat listener_scm1oro1 ONLINE
I do not understand the reason, I've rebuilt the configuration of the listener, and netmgr netca tools, but the problem persists.
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Mar 6, 2012
I have two node RAC database running on linux machine (Oracle10G SE), our requirnment is to install new oracle binaries for Oracle10G EE on diffrent home location.after install Oracle10G EE binaries on new oracle home , i want to point our existing database to new Oracle10G EE home to adotp a features of Oracle10G EE features.
But at the same time i dont want to deinstall our Oracle10G SE binaries.So it is possible to rollback our process to point our database back to Oracle10G SE from Oracle10G EE in case anything going wrong.
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Oct 28, 2010
We have to configure Dataguard for our 24x7 critical banking 2 Node RAC database(10.2.0.4). Before proceeding with the configuration we have to make sure what steps we should follow to have minimum or no downtime.
1) Document covering DG setup in RAC environment.
2) We have to perform switchover as well so need its steps too. Either the normal switchover steps would be used or have to stop/start rac services as well.
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May 28, 2013
why CPU utilization is high(99%) on one server in 2 node RAC at every time. On the other server it is very low.
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Sep 17, 2011
when running the root.sh on second node the following error occured
adding daemons to inittab
expecting the crs daemons to be up within 600 seconds
failure at final check of oracle CRS stack. 10.
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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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