Tnsname for RAC

Hi,
I am working on RAC.
And I want to connect client to the database but I don't know the tnsname's parameter. I tried the normal way which is configuring the IP address and port number and SID and it didn't work. Please help if there is a different way to configure the tnsnames on RAC.
Wessam

Thanks for ur fast reply.
I tried with tns client settings given by U , but it gives me the error:
ora-12154 : TNS : Could not resolve service name.
I have also tried connecting to this same service name from sql*plus client in same (server )machine giving user@service_name it works fine .....but connecting from client on the other machine is giving me the above mentioned error.
Warm Regards
wessam

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How Do I Configure SSL for RAC Installation.

Experts,
Requesting your inputs on configuring SSL for my RAC environment.
- Oracle DB version is 11.2.0.2
- RAC is with two nodes.
- Two nodes are : rac1.oracle.com and rac2.oracle.com
- RAC setup has SCAN feature configured. SCAN FQDN : racscan.oracle.com
- All clients talk to RAC DB using SCAN feature as shown below.
client applications -> racscan.oracle.com ---> rac1.oracle.com
---> rac2.oracle.com
- tnsnames.ora file on both RAC instances has hostname as "racscan.oracle.com" instead of their individual phyiscal host names.
How do I configure SSL for RAC:
1. Do I need to generate certificate request for individual hostnames or only for SCAN hostname ?.
2. If I generate a certificate based on SCAN hostname, how does SSL work since SCAN hostname is not a phyiscal host name ?
3. What is recommended strategy for configuring SSL for RAC environment ?
Thanks

The documentation on the creation of Oracle Wallets is not specific to RAC, and the RAC SCAN instructions for TCPS are very vague on the specific requirements for the certificates required in the wallets for proper operation. I too am struggling to get it to work. Does anyone have a more technical guide to the specific configuration of the certificates needed and what specific configuration file changes need to be made?
Also, the self signed documentation is getting REALLY old. Oracle, please stop giving instructions that demonstrate irresponsibility and show the proper method of certificate requesting and importing to wallets.
Edited by: user11338513 on Mar 21, 2012 2:23 PM

How can I have a collective AWR report for RAC database in 10gR2 and 11gR1?

Plz correct me here
awrrpt.sql takes the snapshot at the instance level and incase we have 5 instances we have to take 5 awr reports for a particular period.correct???
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I have never come across a way for this. though I can n't say it is not there.
But I guess it may not be feasible too becuase as we know the current AWR report contains data which is specific for one instance.
Various hit ratios, top events, instance effeciency reports.... what not ..
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Urgent help needed in configuring X1151A for RAC cluster

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can you please email me a copy of your response at [email protected] ?
thanks
Sami

Look for "ce" instances in the /etc/path_to_inst file. You'll need to change the lines so that the hardware path you want is "1".
Keep a backup and write down the pathname. You can give that path to a 'boot -a' prompt if anything bad happens.
Darren

Error for rman for RAC db

Copyright (c) 1982, 2007, Oracle. All rights reserved.
connected to target database: TEST (DBID=485988764) connected to recovery catalog database
RMAN> run {
2> resync catalog;
3> allocate channel oem_backup_disk1 type disk
4> format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
5> allocate channel oem_backup_disk2 type disk
6> format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
7> backup as COMPRESSED BACKUPSET tag=Nov100921
8> archivelog all not backed up 2 times;
9> release channel oem_backup_disk1;
10> release channel oem_backup_disk2;
11> }
12>
starting full resync of recovery catalog full resync complete
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of allocate command at 11/10/2009 09:22:07
RMAN-06004: ORACLE error from recovery catalog database:
ORACLE error from recovery catalog database:
This is the error for RAC database. This error is because if i include recovery catalog in the script. if there is no recovery catalog then it is working fine.

run {
allocate channel oem_backup_disk1 type disk format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
backup as COMPRESSED BACKUPSET tag=Nov100921 archivelog all not backed up 2 times;
release channel oem_backup_disk1;
it worked successfully.
if i run like this keeping it in script
run {
resync catalog;
allocate channel oem_backup_disk1 type disk
format '/misc/OraBackup/${3}/%d_ARCH_%T_%t_%s';
allocate channel oem_backup_disk2 type disk
format '/misc/OraBackup/${3}/%d_ARCH_%T_%t_%s';
backup as COMPRESSED BACKUPSET tag=$TAG
archivelog all not backed up 2 times;
release channel oem_backup_disk1;
release channel oem_backup_disk2;
then i will get the error
Copyright (c) 1982, 2007, Oracle. All rights reserved.
connected to target database: TEST (DBID=485988764) connected to recovery catalog database
RMAN> run {
2> resync catalog;
3> allocate channel oem_backup_disk1 type disk
4> format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
5> allocate channel oem_backup_disk2 type disk
6> format '/misc/OraBackup/TEST/%d_ARCH_%T_%t_%s';
7> backup as COMPRESSED BACKUPSET tag=Nov100921
8> archivelog all not backed up 2 times;
9> release channel oem_backup_disk1;
10> release channel oem_backup_disk2;
11> }
12>
starting full resync of recovery catalog full resync complete
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of allocate command at 11/10/2009 09:22:07
RMAN-06004: ORACLE error from recovery catalog database:
ORACLE error from recovery catalog database:

What is acceptable level of Private Interconnect Latency for RAC

We have build 3 Node RAC on RHEL5.4 on VMware.
There is node eviction problem due to loss of Network Heartbeat.
ocssd.log:[ CSSD]2010-03-05 17:48:21.908 [84704144] >TRACE: clssnmReadDskHeartbeat: node 3, vm-lnx-rds1173, has a disk HB, but no network HB, DHB has rcfg 0, wrtcnt, 2, LATS 1185024, lastSeqNo 2, timestamp 1267791501/1961474
Ping statistics from Node2 to Node1 are as below
--- rds1171-priv ping statistics ---
443 packets transmitted, 443 received, 0% packet loss, time 538119ms
rtt min/avg/max/mdev = 0.150/2.030/630.212/29.929 ms
[root@vm-lnx-rds1172 oracle]#
Can this be reason for Node eviction? What is acceptable level of of private interconnect latency for RAC ?

What is acceptable level of of private interconnect latency for RAC ?Normal local network latency should be enough. By the way latency settings are very generous.
Can you check if your to-be-evicted node runs and is reachable when seeing the node eviction messages?
In addition to that: Can you check the log files of the eviced node. Check for time stamps around "2010-03-05 17:48:21.908". Make sure all systems are NTP synchronized.
Ronny Egner
My Blog: http://blog.ronnyegner-consulting.de

Oracle White Paper- Storage Option for RAC. on Linux

hi..
This in reference with White Paper.. Stotage Option for RAC on LINUX. Author- Umadevi Byrappa.
Which states on page 10: To Use NAS for RAC database file storage select the file system storage option in OUI. or the Clustered file system storage option in DBCA.
With which i disagree. File storage option of oracle 10g RAC only shows.
1. Clustered File system.
2. ASM
3. Raw Devices.
When i try to select Cfs and select the shared directory on NFS it says. < Directory_Name> is not a clustered file system or Shared on Both <Server_1> < Server_2>. and at this point of time i m stuck.
1. I dont want to use OCFS as its not supporting NAS.
2. Selecting CFS doesnt recognise mounted shared volume as valid storage device option can only store OCRfile and CSS file.
3. So, I have to use ASM.. with zero padded files..which i dont want to because no other option. ( PART NO. B10766-02 PAGE C-6)
Also, I would like oracle to provide Back up Recovery Option or Document which tells me how could i Recover Database when i use Zero Padded Files.
What would be the best Option in the above scenario ?
I hope by applying patch or with workaround somehow it shows Filesystem ONLY.I'll be the happiest man in this Case.
Any suggestions and corrections are most welcome. I wish i m wrong.
Nadeem ( [email protected] )

NFS isn't a clustered file system at all - by RFC it is an exported file system with access controls
If your vendor offers an NFS solution over and beyond that - more power to them. However that isn't "NFS"..
http://www.faqs.org/rfcs/rfc3010.html
You can use NFS in a clustered server environment (to mount apps, read only data and for synchronous access to files), however it doesn't support the concurrency out of the box for RDBMS transactions - if a vendor is supporting this promise then that is for you to decide.
However i stand by my statement that NFS is a file system exported across your network and not a full clustered file system.

Looking for best practice / installation guide for grid agent for RAC

I am looking for best practice / installation guide for grid agent for RAC, running on windows server.
Thanks.

Please refer :
MOS note Id : [ID 378037.1] -- How To Install Oracle 10g Grid Agent On RAC
http://repettas.wordpress.com/2007/10/21/how-to-install-oracle-10g-grid-agent-on-rac/
Regards
Rajesh

Is a gateway mandatory for RAC environment?

Question:
Is a gateway mandatory for RAC installation, general on RAC environment?
*..when yes, why?*
Many thanks
I make this test with my only one RAC node
1. Run with gateway:
[oracle@linux1 ~]$ crs_stat -t
Name           Type           Target    State     Host
ora....SM1.asm application    ONLINE    ONLINE    linux1
ora....X1.lsnr application    ONLINE    ONLINE    linux1
ora.linux1.gsd application    ONLINE    ONLINE    linux1
ora.linux1.ons application    ONLINE    ONLINE    linux1
ora.linux1.vip application    ONLINE    ONLINE    linux1
ora.orcl.db    application    ONLINE    ONLINE    linux1
ora....l1.inst application    ONLINE    ONLINE    linux1
ora....test.cs application    ONLINE    ONLINE    linux1
ora....cl1.srv application    ONLINE    ONLINE    linux1
[oracle@linux1 ~]$ srvctl status database -d orcl
Instance orcl1 is running on node linux1All thing seem correct!
2. run without gateway (blank setting):
[oracle@linux1 ~]$ crs_stat -t
Name           Type           Target    State     Host
ora....SM1.asm application    ONLINE    OFFLINE
ora....X1.lsnr application    ONLINE    OFFLINE
ora.linux1.gsd application    ONLINE    ONLINE    linux1
ora.linux1.ons application    ONLINE    ONLINE    linux1
ora.linux1.vip application    ONLINE    OFFLINE
ora.orcl.db    application    ONLINE    OFFLINE
ora....l1.inst application    ONLINE    OFFLINE
ora....test.cs application    ONLINE    OFFLINE
ora....cl1.srv application    ONLINE    OFFLINE
[oracle@linux1 ~]$ srvctl status database -d orcl
Instance orcl1 is not running on node linux1Something is false!

By default, the server's default gateway is used as a ping target during the Oracle RAC 10g VIP status check action.
Upon a ping failure, Oracle will decide that the current interface where the VIP is running has failed, and will initiate
an interface / internode VIP failover.
In above case, we used just one node for CRS installation, so the VIP coudn't failover to other nodes and thus reported additional error like :
CRS-1006: No more members to consider
CRS-0215: Could not start resource 'ora.dbtest2.vip'.
Try ->
A parameter FAIL_WHEN_DEFAULTGW_NOT_FOUND in the file
$ORA_CRS_HOME/bin/racvip to address this problem.
The following steps will fix the VIP starting problem for above mentioned scenario.
1- stop nodeapps
2- As root,
vi the script $ORA_CRS_HOME/bin/racgvip and change the value of
variable FAIL_WHEN_DEFAULTGW_NOT_FOUND=0 .
3- start nodeapps and you should see the resources ONLINE
You may proceed with netca and dbca to create a RAC database after this.

NETCA listener configuration error for RAC database

Hi,
WE have a RAC setup on 2 nodes and now we want to change the default listener port for RAC database.
Database ver: 10.2.0.4
We now that srvctl does not work to add listener manually to CRS.
We are now using netca to create new listener on both the RAC nodes but it gives error throwing :
Problem in configuration : Node(S): hostname
Try again...
When we try to start the listener say listener_I it throws following error:
Problem in configuration :node1
Listener start to failed:Listener may already be running
CRS-0215:Could not start resource
This is urgent
any help is appreciated.
Regards,
Milan

user12073248 wrote:
How you fix it? write to [email protected]
Hi Mauricio,
In this forum we help for free regardless of priority.
First you try to help in the forum if the author of the post request your e-mail you give to him.
Hope you understand it.
Thanks in advance for doing your part to make this community as valuable as possible for everyone!
Levi Pereira

Can I use virtual Servers in private cloud for RAC

Hello to all
We are going to install an Oracle RAC on two servers
But our Hardware Administrator says to us “I Allocate two virtual servers in the our private cloud not two physical Servers (or real Servers)”
Do you think it’s practical and reasonable to using virtual Server for Oracle RAC in production environment ?
Which one is better physical server or virtual server for RAC?
Please write your reasons
Thanks

Using virtual machines is officially supported for RAC only in a few cases which can be found here:
http://www.oracle.com/technetwork/database/virtualizationmatrix-172995.html
Make sure that you meet these requirements in your private cloud. Some cases like vmware are still somewhat supported despite beeing not on the list.
Beside this you should make sure that your 2 virtual machines run on different hardware servers in the cloud, otherwise you lose most parts of the rac advantage regarding high availability, when both virtual servers happen to run on the same hardware during a crash
Virtual servers are used in production environments, but you will have to take greater care for many aspects of rac compared to physical hardware, e.g.. something like "live migration" of vmware can kill a rac node due to timeout.
I would prefer hardware for rac anytime over virtual servers and spare me the hassle of dealing with all possible issues arising from the virtualization.
And check oracles licensing policy...
Running an enterprise edition rac on e.g. a large vmware cluster is insanely expensive, you pay every cpu core the rac COULD run on -> the entire cluster!
If you must use virtual hardware but don't want to and need an argument against it use the license issue.
Regards
Thomas

OVM disks for RAC implementation

Dear All
is there any guide available on how can you create the disks for RAC ASM in OVM 3.3.1 using a fiber channel block level storage?
Thanks
George

You are right, you can't use virtual disks for RAC configuration. Have a look here (especially page 18):
http://www.oracle.com/technetwork/products/clustering/oracle-rac-in-oracle-vm-environment-131948.pdf
Using physical disks means that you create LUNs on your storage array connected to Oracle VM Servers by fabric channel. You map these LUNs to all servers in the pool or all standalone servers where you are going to install your virtual machines being Clusterware nodes. Then you rediscover storage in Oracle VM Manager, mark these LUNs as "shared" in OVMM and add them to your virtual machines as "Physical disks" (by editing guest properties in OVMM).
Alternatively you can directly map iSCSI or NFS storage to your guests. By "directly" I mean you use IP addresses and software in your guests as iSCSI initiator or NFS client - without engaging Oracle VM in the middle.
Regards,
Michal

Configuring oracle OCI client for RAC 10.2.0.1

hi,
can any one give the links for doc for
configuraing oracle OCI client for RAC
regards
krishna

Download from below:
http://www.oracle.com/technology/tech/dotnet/ode/index.html
Refer:
Note:374820.1 - How to Install the Oracle Database Extensions for .NET (ODE.NET) from metalink.

Standalone Standby Creation for RAC database

Hi,
I am in process of configuring standalone standby for my RAC database. The database version is 11.2.0.3. RAC is using SCAN listeners. I have got MOS for configuring standalone standby for RAC 387339.1. But specific steps I need to perform in case of SCAN listeners.
Any document or link is appreciated.
Regards,

Hello;
The white paper "Rapid Oracle RAC Standby Deployment: Oracle Database 11g Release 2" has a section on this.
http://www.oracle.com/technetwork/database/features/availability/maa-wp-11g-rac-standby-133152.pdf
This may also help :
http://www.oracle.com/technetwork/database/availability/maa-wp-11g-racone-standby-501088.pdf
And these :
Configuring and Administering Oracle Net Listener
http://docs.oracle.com/cd/E11882_01/network.112/e10836/listenercfg.htm
srvctl relocate scan
http://download.oracle.com/docs/cd/E11882_01/rac.112/e16795/srvctladmin.htm#RACAD7499
srvctl relocate scan_listener
http://download.oracle.com/docs/cd/E11882_01/rac.112/e16795/srvctladmin.htm#CDDIDDCF
Troubleshooting Oracle Clusterware
http://download.oracle.com/docs/cd/E11882_01/rac.112/e16794/troubleshoot.htm#CHDFJIEG
From Oracle support :
How to Setup SCAN Listener and Client for TAF and Load Balancing [Video] [ID 1188736.1]
Best Regards
mseberg

How can I config listener and tnsnames for 2 instances?

Now I can create 2 instances on single machine but I can't config listener and tnsnames for them.
Every time that I reconfig tnsnames, the newer is available but the old is unavailable. For example, there are instance A and instance B. When instace A can be connected instance B can't be connected. The error message is "ORACLE not available", although instance B is already started.

Insert into listener.ora
after the characteristics of
first database
(SID_DESC =
(GLOBAL_DBNAME = <global_dbname>)
(ORACLE_HOME = <oracle_home>)
(SID_NAME = <second_sid>)
Copy Paste the sid_desc of your first db
and insert it with the second sid
lsnrctl restart
and the outputs messages will show you
two instances and the extproc.
null

Tnsname for RAC

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