Change hostname on nodes in STANDY RAC Cluster

Hi,
I would like to know the required steps to modify and hostname configuration in Oracle RAC if I update the hostnames of the 2 nodes in the RAC
Im running Redhat EL 5 , Oraclle 11g
Thanks in advance

I don't think you could change the hostname with CRS, without re-installing CRS.

Similar Messages

Domain Name change on 1 node of RAC

Is there oracle note for changing domain name on RAC?
Edited by: FrodoDot on Jan 9, 2010 5:55 PM

FrodoDot wrote:
Is there oracle note for changing domain name on RAC?
Edited by: FrodoDot on Jan 9, 2010 5:55 PMWhat oracle version?
If your RAC registered hostname + domain, this case like you change hostname
Check:
$ olsnodes
Changing Hostnames in Oracle RAC
http://www.pythian.com/news/482/changing-hostnames-in-oracle-rac/
1 node of RAC -> you may delete node/change hostname/add node
If domain, not registered in RAC... you may change it ... (no remove node or reinstall RAC)

[b]Migrating the DB-Tier (DB and CM) to Two node non RAC cluster[/b]

Hi,
The current set-up of our E-business suite is a two node install:-
The DB Tier (Database and Concurrent Manager) on one node
The Apps Tier (Forms /Web Server) on another node.
For the HA solution (NON ORACLE RAC) we are planning to:-
Move the DB Tier (Database and Concurrent Manager) to a three node hardware sun cluster managed by veritas cluster manager (NOT ORACLE RAC). We need to know will the Database Tier (Database and Concurrent Manager) work on Hardware cluster node and will it support COLD FAILOVER from one Node to another. We know the database on its own would be fine with a cold failover because we have tested the database cold failover on the three node cluster for non E-business suite database. But here we have the added thing of the Concurrent manger sitting on the node along with the Database on the DB Tier.
The Apps Tier (Forms / Web server) will be put on a separate set of server using Load balances etc.
Has anybody implemented similar HA set-up and will this planned set-up work or are there any issues with this.
Any help / info would be appreciated.
Thanks

Hi,
Yes, you can do the cold failover the database and all the 11i services also.
1. In the concurrent manager service
== when you failover the concurrent manager do the following things before failover.
create the listener/tnsnames files which includes the new hostname and keep it with the veritas failover service. i mean, when you failover, these files should replace the existing files, before the existing files should backedup. and create a script to change the hostname,logfile_hostname,outfile_hostname in fnd_concurent_processes table.
add the nodes in the install->nodes navigation
do the failover manually and check the listener files are properly pinging using tnsping. and start the concurrent manager.
so tatally, you have to prepare two sql scripts
one for change the hostname from node b to node a
one for node a to node b.
and 2 listener + 2 tnsnames files which contains the seperate hostname accordingly.
use the adcmctl.sh top stop and start
finally, create a shell script to kill the sysmgr for the current managers when the manager takes long time to shutdown. before run the kill script, wait for 5 mts atleast.
I done the same scenario many times, with veritas failover service with 2 sun v880 servers.
regards,
Pandian

Change system time in RAC cluster

Hi,
We need to change the system time of two nodes involded in a RAC cluster, both the nodes are almost 15 minutes ahead of real time but are in sync with each other.
Does Oracle database require to bounce to get the latest changed time?
or does the whole cluster services needed to be stopped for 15 minutes after changing the time and then started? just in case not to confused with the transactions happened when the system was 15 minutes ahead.
The metalink note ID 368539.1 explains that PMON process does the service registration when the database was started. The PMON will not take the changed time dynamically?
We have oracle 10.2.0.2 database on HP UX 11.31
Please clear this confusion.
Thanks.

Your RAC Cluster would be using either of
a. NTP --- external to Oracle
b. Oracle Cluster Time Synchronization Service -- part of the Oracle Grid Infrastructure
It seems that you are not using NTP -- else the two nodes would have the same time as "the rest of the world".
You should see "Cluster Time Synchronization Service" in your clusterware logs.
Since you plan to reset the time backwards, I suggest that you shutdown and reset the time manually.
Remember that timestamps written to various log files and "last update" time of various files themselves, will duplicate or overlap with existing files.
Note : PMON service registration doesn't come into play here.
Hemant K Chitale

Cluster changing hostname & Logical host

hello I have sunCluster 3.1 update 4.
the cluster is 2(v440) + 1(v240) installed on solaris8.
Did anyone actualy succeeded to change the hostnames of all the nodes & Logical host on SunCluster system like above?
I saw a procedure that is not realy supported :
1. Reboot cluster nodes into non-cluster node (reboot -- -x)
2. Change the hostname of the system (nodenames, hosts etc)
3. Change hostname on all nodes within the files under /erc/cluster/ccr
4. Regenerate the checksums for each file changed using ccradm -I /etc/cluster/ccr/FILENAME -0Reboot every cluster node into the cluster
is it works?
Thanks & Regards

So if I understand you correctly, you have two metasets already created and mounted. If so, this is a fairly tricky process (outlined from memory):
1. Backup your data
2. Shut down the RGs using scswitch -F -g <RGnames>, make the RGs unmanaged
3. Unmount the file systems
4. Deconstruct the metasets and mediators
5. Shutdown the cluster and boot -x
6. Change the hostnames in /etc/inet/hosts, etc
7. Change the CCR and re-checksum it
8. Reboot the cluster into cluster mode
9. Re-construct metasets and mediators with new host names
10. scswitch -Z -g <RGs>
If you recreate your metasets in the same way as they were originally created and the state replicas haven't changed in size, then the data should be intact.
Note - I have not tried this process in a long time. Remember also that changing the CCR as described previously is officially unsupported (partly because of the risks involved).
Regards,
Tim
---

Theoretical question on having "stand by" instance on 4 node RAC cluster.

We have been having discussions on how we can improve the overall stability and performance of our RAC cluster. Currently we are running multiple databases on a 2 node cluster. The idea is that we will add two more nodes to the cluster and then spread the instances across the 4 nodes but only have two active and 1 as a standby in the event of node failure.
In other words:
Node1, Node2, and Node3 would run DB1
Node 4 Node3 and Node2 would run DB2
Additionally DB1_Instance3 would be shutdown on Node3 and only started if Node1 or 2 failed.
This would be the same for DB2 where DB2_Instance3 on Node2 would only be started if Node3 or Node4 failed.
Underneath them all would be the same ASM database shared for all 4 nodes.
Has anyone seen such a configuration? Is anyone aware of a white paper that discusses it.

the parameter active_instance_count is a 9i parameter and should only be set if you want to run RAC with a 2 node cluster - one instance active (all users connected here) and the second instance up but no one actively using it. IF instance one goes away, all work is move to instance 2. This is hot failover .
If you are adding a new instance to a rac database, you are recommended to use DBCA or EM to add the instance. If you do not want to have users connected to the instance all the time, you can either leave it running but do not enable any services on it until you need it or stop the instance with srvctl stop instance. The cluster will not try to restart the instance automatically.
The services option, when you create a service, you define which instances you wish it to run on. You can dynamically change where it runs. For the end user, they just connect to the service, the listener directs the connection to the least loaded instance providing the service at connect time. See the workload management with RAC 10g white paper on otn (otn.oracle.com/rac) or Chapter 6 of admin & deploy guide

SOA with Oracle 2 node RAC cluster

Hi All,
Just a simple doubt, I have successfully installed and configured SOA suite 11.1.1.3 & BAM in one wls Domain 10.3.3 in a linux box and could access all the application like BAM console, BPEL console etc .... also could see all my data-sources deployed in the Data Sources with a single node database.
1. Now I have to RE-configure this whole SOA suite with RAC (2 node database cluster) what changes or configuration needed to implement SOA suite with RAC database?
2. Do I need to create a "Multi Data Source" to configure RAC with SOA suite..?
Thanks
Sam

DB wrote:
This is regarding Oracle RAC..so if there is a specific category..please let me know..
I have installed OEL linux 5.6 as guest OS (using virtualbox) in two laptops.
I want to install 2 node oracle 10gR2 RAC with the OEL linux as OS and each laptop as one node.
Read docs and understood that there must be shared storage for oracle clusterware and oracle ASM for oracle RAC to work.
Please let me know the steps to create shared storage for oracle clusterware and oracle ASM (considering virtualbox OEL) and to configure public,private and virtual IPs.
I already have document to create 2node oracle RAC using virtualbox with two nodes on the same laptop.so please dont suggest that doc.
Thanks,
DBMay be my step by step RAC installation guide can help you somehow?
http://kamranagayev.wordpress.com/2011/04/05/step-by-step-installing-oracle-10g-rac-on-vmware/

Multiple databases/instances on 4-node RAC Cluster including Physical Stand

OS: Windows 2003 Server R2 X64
DB: 10.2.0.4
Virtualization: NONE
Node Configuration: x64 architecture - 4-Socket Quad-Core (16 CPUs)
Node Memory: 128GB RAM
We are planning the following on the above-mentioned 4-node RAC cluster:
Node 1: DB1 with instanceDB11 (Active-Active: Load-balancing & Failover)
Node 2: DB1 with instanceDB12 (Active-Active: Load-balancing & Failover)
Node 3: DB1 with instanceDB13 (Active-Passive: Failover only) + DB2 with instanceDB21 (Active-Active: Load-balancing & Failover) + DB3 with instanceDB31 (Active-Active: Load-balancing & Failover) + DB4 with instance41 (Active-Active: Load-balancing & Failover)
Node 4: DB1 with instanceDB14 (Active-Passive: Failover only) + DB2 with instanceDB22 (Active-Active: Load-balancing & Failover) + DB3 with instanceDB32 (Active-Active: Load-balancing & Failover) + DB4 with instance42 (Active-Active: Load-balancing & Failover)
Note: DB1 will be the physical primary PROD OLTP database and will be open in READ-WRITE mode 24x7x365.
Note: DB2 will be a Physical Standby of DB1 and will be open in Read-Only mode for reporting purposes during the day-time, except for 3 hours at night when it will apply the logs.
Note: DB3 will be a Physical Standby of a remote database DB4 (not part of this cluster) and will be mounted in Managed Recovery mode for automatic failover/switchover purposes.
Note: DB4 will be the physical primary Data Warehouse DB.
Note: Going to 11g is NOT an option.
Note: Data Guard broker will be used across the board.
Please answer/advise of the following:
1. Is the above configuration supported and why so? If not, what are the alternatives?
2. Is the above configuration recommended and why so? If not, what are the recommended alternatives?

Hi,
As far as i understand, there's nothing wrong in configuration except you need to consider below points while implementing final design.
1. No of CPU on each servers
2. Memory on each servers
3. If you've RAC physical standby then apply(MRP0) will run on only one instance.
4. Since you are configuring physical standby for on 3rd and 4th nodes of DB1 4 node cluster where DB13 and DB14 instances are used only for failver, if you've a disaster at data center or power failure in entire data center, you are losing both primary and secondary with an assumption that your primary and physical standby reside in same data center so it may not be highly available architecture. If you are going to use extended RAC for this configuration then it makes sense where Node 1 and Node 2 will reside in Datacenter A and Node 3 ,4 will reside in Datacenter B.
Thanks,
Keyur

Node can not join cluster after RAC HA Testing

Dear forum,
We are performing RAC failover tests according to document "RAC System Test Plan Outline 11gR2, Version 2.0". In testcase #14 - Interconnect network failure (11.2.0.2 an higher), we have disabled private interconnect network of node node1 (OCR Master).
Then - as expected - node node2 was evicted. Now, after enabling private interconnect network on node node1, i want to start CRS again on node2. However, node does not join cluster with messages:
2012-03-15 14:12:35.138: [ CSSD][1113114944]clssgmWaitOnEventValue: after CmInfo State val 3, eval 1 waited 0
2012-03-15 14:12:35.371: [ CSSD][1109961024]clssnmvDHBValidateNCopy: node 1, node1, has a disk HB, but no network HB, DHB has rcfg 226493542, wrtcnt, 2301201, LATS 5535614, lastSeqNo 2301198, uniqueness 1331804892, timestamp 1331817153/13040714
2012-03-15 14:12:35.479: [ CSSD][1100884288]clssnmvDHBValidateNCopy: node 1, node1, has a disk HB, but no network HB, DHB has rcfg 226493542, wrtcnt, 2301202, LATS 5535724, lastSeqNo 2301199, uniqueness 1331804892, timestamp 1331817154/13041024
2012-03-15 14:12:35.675: [ CSSD][1080801600]clssnmvDHBValidateNCopy: node 1, node1, has a disk HB, but no network HB, DHB has rcfg 226493542, wrtcnt, 2301203, LATS 5535924, lastSeqNo 2301200, uniqueness 1331804892, timestamp 1331817154/13041364
Rebooting node2 did not help. Node1 which was online all the time (although private interconnect interface was unplugged for a few minutes and then plugged back in). I suppose that if we reboot node2, the problem will disappear. But there should be solution, which keeps availability requirements.
Setup:
2 Nodes (OEL5U7, UEK)
2 Storages
Network bonding via Linux bonding
GI 11.2.0.3.1
RDBMS 11.1.0.7.10
Any ideas?
Regards,
Martin

I have found a solution myself:
[root@node1 trace]# echo -eth3 > /sys/class/net/bond1/bonding/slaves
[root@node1 trace]# echo -eth1 > /sys/class/net/bond1/bonding/slaves
[root@node1 trace]# echo +eth1 > /sys/class/net/bond1/bonding/slaves
[root@node1 trace]# echo +eth3 > /sys/class/net/bond1/bonding/slaves
Now node2 is automatically joining the cluster.
Regards,
martin

Automatic restart of services on a 1 node rac cluster with Clusterware

How do we enable a service to automaticly start-up when the db starts up?
Thanks,
Dave

srvctl enable service -d DBThanks for your reply M. Nauman. I researched that command and found we do have it enabled and that it only works if the database instance was previously taken down. Since the database does not go down on an Archiver Hung error as we are using FRA with an alt location, this never kicks in and brings up the service. What we are looking for something that will trigger off of when the archive logs error and switch from FRA(Flash Recovery Area) to our Alternate disk location. Or more presicely, when it goes back to a Valid status(on the FRA - after we've run an archive log backup to clear it).
I found out from our 2 senior dba's that our other 2 node rac environment does not suffer from this problem, only the newly created 1 node rac cluster environment. The problem is we don't know what that is(a parameter on the db or cluster or what) and how do we set it?
Anyone know?
Thanks,
Gib
Message was edited by:
Gib2008
Message was edited by:
Gib2008

All connections are connecting to 2nd node only in a 2 Node RAC Cluster

Hello,
I have a 10.2.0.3 database on a two node RAC Cluster with only one service configured. This service set to be preferred on both nodes.
However, all the connections are falling on Node2 only. Any idea where to look.
$> srvctl config service -d PSDB
psdbsrv1 PREF: psdb1 psdb2 AVAIL:
Thanks,
MM

Application is using the following connection string.
jdbc:oracle:thin:@(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = PQ2-PS-db-01-vip)(PORT = 1521))(ADDRESS = (PROTOCOL = TCP)(HOST = PQ2-PS-db-02-vip)(PORT = 1521)) (LOAD_BALANCE = yes) (CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = PSDBSRV1)(FAILOVER_MODE =(TYPE = SELECT)(METHOD = BASIC)(RETRIES = 180)(DELAY = 5))))
--MM

Routing all connections through a one node in a 2 node RAC cluster

Hi everyone
My client has the following requirement: an active/active RAC cluster (eg node1/node2), but with only one of the nodes being used (node1) and the other sitting there just in case.
For things like services, i'm sure this is straightforward enough - just have them set to preferred on node1 and available on node 2.
For connections, I imagine I would just have the vips in order in the tns file, but with LOAD_BALANCING=OFF, so they go through the tns entries in order (i.e node 1, then node 2), so this would still allow the vip to failover if node 1 is down.
Does that sound about right? Have I missed anything?
Many thanks
Rup

user573914 wrote:
My client has the following requirement: an active/active RAC cluster (eg node1/node2), but with only one of the nodes being used (node1) and the other sitting there just in case.Why? What is the reason for a "+just in case+" node - and when and how is is "enabled" when that just-in-case situation occurs?
This does not many any kind of sense from a high availability or redundancy view.
For connections, I imagine I would just have the vips in order in the tns file, but with LOAD_BALANCING=OFF, so they go through the tns entries in order (i.e node 1, then node 2), so this would still allow the vip to failover if node 1 is down.
Does that sound about right? Have I missed anything?Won't work on 10g - may not work on 11g. The Listener can and does handoff connections, depending on what the TNS connection string say. If you do not connect via a SID entry but via a SERVICE entry, and that service is available on multiple nodes, you may not (and often will not) be connected to instance on the single IP that you used in your TNS connection.
Basic example:
// note that this TEST-RAC alias refers to a single specific IP of a cluster, and use
// SERVICE_NAME as the request
/home/billy> tnsping test-rac
TNS Ping Utility for Linux: Version 10.2.0.1.0 - Production on 18-JAN-2011 09:06:33
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/network/admin/sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS=(PROTOCOL=TCP)(HOST= 196.1.83.116)(PORT=1521)) (LOAD_BALANCE=no) (CONNECT_DATA=(SERVER=shared)(SERVICE_NAME=myservicename)))
OK (50 msec)
// now connecting to the cluster using this TEST-RAC TNS alias - and despite we listing a single
// IP in our TNS connection, we are handed off to a different RAC node (as the service is available
// on all nodes)
// and this also happens despite our TNS connection explicitly requesting no load balancing
/home/billy> sqlplus scott/tiger@test-rac
SQL*Plus: Release 10.2.0.1.0 - Production on Tue Jan 18 09:06:38 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Data Mining and Real Application Testing options
SQL> !lsof -n -p $PPID | grep TCP
sqlplus 5432 billy 8u IPv4 2199967 0t0 TCP 10.251.93.58:33220->196.1.83.127:37031 (ESTABLISHED)
SQL> So we connected to RAC node 196.1.83.116 - and that listener handed us off to RAC node 196.1.83.127. The 11gr2 Listener seems to behave differently - it does not do a handoff (from a quick test I did on a 11.2.0.1 RAC) in the above scenario.
This issue aside - how do you deal with just-in-case situation? How do you get clients to connect to node 2 when node 1 is down? Do you rely on the virtual IP of node 1 to be switched to node 2? Is this a 100% safe and guaranteed method?
It can take some time (minutes, perhaps more) for a virtual IP address to fail over to another node. During that time, any client connection using that virtual IP will fail. Is this acceptable?
I dunno - I dislike this concept of your client of treating the one RAC node as some kind of standby database for a just-in-case situation. I fail to see any logic in that approach.

How to change the primary node for a resource group. Solaris cluster. 3.2

I have searched for hours to try to find this answer.
I want to change the primary node of a resource group.
example.
log-rg runs on node1.this.com it will list node1.this.com first when you do clrg status.
But we run it on node2.this.com
A reboot will have log-rg run on node1 after a reboot. We have to switch it by hand to run
on node2 .
I want it to know that it should always try to first run on node1, but still failover to node2 if the situation arises.
scswitch -z -g log-rg -h node2 (and all the fully qualified versions of this command)
would not work.
How tow can I change the primary node for log-rg (logZ) from node1 to node2???
thanks!

Hi.
Show current configuration for RG:
clrg show -v log-rg
For change order Nodelist you can:
clrg remove-node -n node1 log-rg
clrg add-node -n node1 log-rg
But tis command more destructive. It may be problem add-node back to this RG.
I don't know why Validation of resource log-tiv in res group log-rg on node1 failed.
Need more know about configuration, resourse type, etc.
May be it's better create for test small RG and try move and change resource.
Nodelist - say candidates for run this resources. But at this moment RG can run on any from this list.
Docs about Sun Cluster.
http://download.oracle.com/docs/cd/E19787-01/820-7360/fxjbo/index.html
Typical tasks:
http://download.oracle.com/docs/cd/E19787-01/820-7359/z40002701009474/index.html
Adding or Removing a Node to or From a Resource Group
http://download.oracle.com/docs/cd/E19787-01/820-7359/z400043a1055200/index.html

Install mulutple RAC databases on 2-node RAC cluster

I am installing 5 RAC databases on a 2-node RAC cluster. I have setup SCAN using 3 IP addresses.
Do I have to use SCAN listener for all databases?
When installing the 3 database, I get ORA-12537: TNS connection closed error.
ENV: 11gR2 2-node RH5.x
Thanks!

I have setup SCAN using 3 IP addresses.
Do I have to use SCAN listener for all databases?These 3 scan ip will work for youe all database running under this cluster setup.
you may also use VIP to make connection like 10g.
I get ORA-12537: TNS connection closed error.Appear some connectivity/configuration isue,please try MOS doc contain detail on this.
How to Troubleshoot Connectivity Issue with 11gR2 SCAN Name [ID 975457.1]

Oracel 11gR1 RAC Cluster issue

We have 2-node Oracle 11gR2 RAC on HP-UX 11.31 environment. It was running lase 2 month without any issue.
We got some netconfig issue, and node-1 got rebooted today. after the reboot cluster didn't not start on node-1, database is running on node-2.
grid@hublhp4:/app/oracle/grid/product/11.2.0.1/log/hublhp4/crsd$ crsctl check crs
CRS-4638: Oracle High Availability Services is online
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4529: Cluster Synchronization Services is online
CRS-4534: Cannot communicate with Event Manager
grid@hublhp4:/app/oracle/grid/product/11.2.0.1/log/hublhp4/crsd$ crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
grid@hublhp4:/app/oracle/grid/product/11.2.0.1/log/hublhp4/crsd$ ocrcheck
PROT-602: Failed to retrieve data from the cluster registry
PROC-26: Error while accessing the physical storage ASM error [SLOS: cat=8, opn=kgfolclcpi1, dep=301, loc=kgfokge
AMDU-00301: Unable to open file tmp-AMIPOCR01.ocr
AMDU-00204: Disk N0002 is in currently mounted diskgroup AMIPOCR01
AMDU-00201: Disk N0002: '/dev/rdisk/ora_OCR
] [8]
grid@hublhp4:/app/oracle/grid/product/11.2.0.1/log/hublhp4/crsd$ olsnodes -n
hublhp4 1
hublhp5 2
any idea please.
Edited by: ManoRangasamy on Jul 5, 2011 6:38 PM

Hi,
Please post the alertlog ASM from node 1, crsd.log and ocssd.log from node 1
It might be because node 1 can't see asm disk or permission accidentally changed when the node rebooted
Cheers

Change hostname on nodes in STANDY RAC Cluster

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