Is TAF creation must in 10g RAC

Dear Friends,
Is TAF creation must in 10g RAC
Regards,
DB

user564706 wrote:
Dear Friends,
Is TAF creation must in 10g RAC
Regards,
DBYou can say Configuration instead of creation of TAF in RAC.
Then only session can failover to other nodes when active node goes down/evicted.
Is it mandatory or not depends on your requirement. :) That is the main concept of introducing TAF in RAC. still if you wont use then what is the need to have RAC in your environment.?

Similar Messages

MULTIPLE USERS 10G RAC ORACLE_HOME INSTALL WITH ASM/CRS

Hi,
We need to install multiple 10g RAC databases on a two node Sun servers. Below is our configuration:
1) Sun Solaris (ver 10) with Sun Cluster 3.2
2) One ASM/CRS install (by 1 OS account)
3) Four ORACLE_HOME 10g database install (by 4 different OS user accounts)
We would like to use one ASM instance for all four databases with appropriate privileges.
OS User:           OS Group
========      =========
oraasm           dbaasm - (ASM and CRS install owner)
ora1           dbaora1 - first db owner
ora2           dbaora2 - second db owner
ora3           dbaora3 - third db owner
ora4           dbaora4 - fourth db owner
I understand that certain privileges need to be shared between ASM/CRS and DB owners. Please let me know the steps to be followed to complete this install.
Thanks in advance.

Hi
Please read that: Documentation http://download.oracle.com/docs/html/B10766_08/intro.htm
- You can install and operate multiple Oracle homes and different versions of Oracle cluster database software on the same computer as described in the following points:
-You can install multiple Oracle Database 10g RAC homes on the same node. The multiple homes feature enables you to install one or more releases on the same machine in multiple Oracle home directories. However, each node can have only one CRS home.
-In addition, you cannot install Oracle Database 10g RAC into an existing single-instance Oracle home. If you have an Oracle home for Oracle Database 10g, then use a different Oracle home, and one that is available across the entire cluster for your new installation. Similarly, if you have an Oracle home for an earlier Oracle cluster database software release, then you must also use a different home for the new installation.
If the OUI detects an earlier version of a database, then the OUI asks you about your upgrade preferences. You have the option to upgrade one of the previous-version databases with DBUA or to create a new database using DBCA. The information collected during this dialog is passed to DBUA or DBCA after the software is installed.
- You can use the OUI to complete some of the de-install and re-install steps for Oracle Database 10g Real Application Clusters if needed.
Note:
Do not move Oracle binaries from one Oracle home to another because this causes dynamic link failures.
. If you are using ASM with Oracle database instances from multiple database homes on the same node, then Oracle recommends that you run the ASM instance from an Oracle home that is distinct from the database homes. In addition, the ASM home should be installed on every cluster node. This prevents the accidental removal of ASM instances that are in use by databases from other homes during the de-installation of a database's Oracle home.

10g RAC on VMWare Workstation

Hi Folks,
i tried to install 10g RAC on VMWare 4.5.2 for testing.
Hostsystem is XP, ghost system are RedHat-ES-30.
I configured tho 2 nodes with 2 scsi adapters and 2 Network Card and a shared Disk.
I installed ocfs 1.0.12 on both nodes, formated the disk and it seems to be fine.
On the next step ( Installation of CRS ) the runInstaller fails after the node configuration screen with the message:
Oracle Cluster Registry File can only be saved on a shared filesystem file or on a RAW Device.
Any Ideas ?
Thanks
Martin

Hi Laurent,
Thanks for your reply.
I checked that and i can't find the Processes or any think else witch is discribed in thr article !
The Installer pops a message during the creation of the ocr file.
Have any body tried it with RAW Devices ?
Martin

10g RAC - should I use RAW, OCFS and/or ASM ?

I am about to install 10G RAC on RHAS3. Options for sharing disk partitions are raw, OCFS and ASM. The OCR and voting files must be raw or OCFS, I would tend to go for OCFS in this case. For the Oracle datafiles, again, I would tend to go for OCFS simply for ease of management since ASM seems to add another layer of complexity, and raw lacks flexibility. OCFS however is also new technology and may still have some stability issues. I'm not yet sure of our disk configuration, but there will be HBA cards in each machine with one or two SAN partitions, so I don't expect some of the ASM features such as mirroring etc. will be required as this will be done in the hardware. Does anyone have any recommendations or experiences(good or bad) in which way to go ?
Philip

We're using raw partitions for some years now, (since oracle 8i, then 9i and now 10g). It is quite flexible, but you shouldn't use physical partitions but LVM. It's very stable.
Now on 10g we're using ASM on some sites where mirroring is needed. It works, but not so stable as raw. we discover some bugs as well.
We've never used OCFS. I don't like it. To much limits. I belive that special utilities are needed for managing files. I don't like linux system software produced by oracle.

CRS-0210: Could not find resource while start ASM on 10G RAC

Dear All
I'm trying to install 10g RAC on Redhat 4.1. At the point at which I try to start ASM it fails with the message
ORA-03113: end-of-file on communication channel
select value from v$parameter where name='instance_type'
ERROR at line 1:
ORA-01034: ORACLE not available
This seems to be due to a failure CRS. The trace file shows:
[Thread-11] [17:14:2:907] [HAOperationImpl.runCommand:1254] CRS cmd is: /u01/app/oracle/product/10.2.0/crs/bin/crs_stat -u ora.bfhxx-sql012.ASM1.asm
[Thread-41] [17:14:2:964] [StreamReader.run:65] OUTPUT>CRS-0210: Could not find resource ora.bfhxx-sql012.ASM1.asm.
Executing
/u01/app/oracle/product/10.2.0/crs/bin/crs_stat
produces:
NAME=ora.bfhxx-sql012.LISTENER_BFHXX-SQL012.lsnr
TYPE=application
TARGET=ONLINE
STATE=ONLINE on bfhxx-sql012
NAME=ora.bfhxx-sql012.gsd
TYPE=application
TARGET=ONLINE
STATE=ONLINE on bfhxx-sql012
NAME=ora.bfhxx-sql012.ons
TYPE=application
TARGET=ONLINE
STATE=ONLINE on bfhxx-sql012
NAME=ora.bfhxx-sql012.vip
TYPE=application
TARGET=ONLINE
STATE=ONLINE on bfhxx-sql012
Is this a red herring or is it the reason ASM won't start? At what point should this entry have been created (ie should it already exist when ASM starts or should ASM create it)? Can I manually create the entry using crsstat.
Many thanks
Paul

It all depends on what your mapping problem was and what you did to resolve it. Here are a couple of things you could try:
-Make sure the orc.loc file on ebdb1 has the same entry as ebdb2. Also, say you are using shared raw devices for CRS: make sure your raw devices are consistent on both nodes.
If the above does not work
-Make sure the shared devices are consistent on both nodes and restore one of the OCR backups. I am sure at least one of the backups 4hrs/8hrs/1day/2day/1week some thing must be a worthwhile. If you do restore OCR from a backup make sure to run cluvfy before you start your CRS.
Always a good practise to take a backup of status quo before you restore from the backups.
It would be interesting to know what lead to your disk mapping problem in the first palce.
Good Luck!

Oracle 10G RAC - Public & Heartbeat on 1 NIC

Hello all,
actually I am installing Oracle 10G RAC on rhel 4 (4 node cluster). But the Cluster Verification Utility aborts with errors. I checked the configToolAllCommands and tried to run the failed commands manually:
#/opt/oracle/crs/bin/oifcfg setif -global eth0.100/172.18.0.0:cluster_interconnect eth0.728/172.16.128.0:public eth0.498/172.17.1.0:cluster_interconnect
PRIF-50: duplicate interface is given in the input
PRIF-50: duplicate interface is given in the input
PRIF-50: duplicate interface is given in the input
Question:
Is it possible to put Public & Heartbeat on one NIC (eth0.728 & eth0.498)
If not is their any workaround for that issue?
Output /etc/hosts
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
172.18.253.48 eu0266.[company].net cfmaster
172.16.128.11 eu0200.[company].net eu0200
172.16.128.12 eu0201.[company].net eu0201
172.16.128.13 eu0202.[company].net eu0202
172.16.128.14 eu0203.[company].net eu0203
172.18.13.11 eu0200m.[company].net eu0200m
172.18.13.12 eu0201m.[company].net eu0201m
172.18.13.13 eu0202m.[company].net eu0202m
172.18.13.14 eu0203m.[company].net eu0203m
# Private section
172.17.1.11 eu0200-priv.[company].net eu0200-priv
172.17.1.12 eu0201-priv.[company].net eu0201-priv
172.17.1.13 eu0202-priv.[company].net eu0202-priv
172.17.1.14 eu0203-priv.[company].net eu0203-priv
# Virtual section
172.16.128.16 eu0200-vip.[company].net eu0200-vip
172.16.128.17 eu0201-vip.l[company].net eu0201-vip
172.16.128.18 eu0202-vip.[company].net eu0202-vip
172.16.128.19 eu0203-vip.[company].net eu0203-vip
Output install log:
Checking existence of VIP node application (required)
Check failed.
Check failed on nodes:
eu0203,eu0202,eu0201,eu0200
Checking existence of ONS node application (optional)
Check ignored.
Checking existence of GSD node application (optional)
Check ignored.
Post-check for cluster services setup was unsuccessful on all the nodes.
Command = /opt/[company]/oracle/crs/bin/cluvfy has failed
INFO: Configuration assistant "Oracle Cluster Verification Utility" failed
*** Starting OUICA ***
Oracle Home set to /opt/[company]/oracle/crs
Configuration directory is set to /opt/[company]/oracle/crs/cfgtoollogs. All xml files under the directory will be processed
INFO: The "/opt/[company]/oracle/crs/cfgtoollogs/configToolFailedCommands" script contains all commands that failed, were skipped or were cancelled. This file may be used to run these configuration assistants outside of OUI. Note that you may have to update this script with passwords (if any) before executing the same.
SEVERE: OUI-25031:Some of the configuration assistants failed. It is strongly recommended that you retry the configuration assistants at this time. Not successfully running any "Recommended" assistants means your system will not be correctly configured.
1. Check the Details panel on the Configuration Assistant Screen to see the errors resulting in the failures.
2. Fix the errors causing these failures.
3. Select the failed assistants and click the 'Retry' button to retry them.
Thanks in advance for your help!
Regards

Tads wrote:
Hi all,
I have a question about Oracle RAC and network interface.
We're using Oracle 10gR2 RAC with two nodes on Linux Red Hat.
Let's assume that the public network interface goes down.
I would like to know what happens with existing connections
on node with network interface with problems.
Are connections frozen, actives?
Can the users continue to use theses existing connections using the another node of RAC?If the interface is down? what do you think? All connections to this node will die. How does your application handle fail-over, does it attempt to reconnect or just have a complete application failure?
You should spend some time in a test lab where you can test this stuff for yourself. Read the documentation and there are tons of sites out there that purport to have all of your RAC/TAF/FAN/FAF questions. - I would read and trust the documentation first.
>
I know that the listener goes down and any other connections is allowed.
Thank you very much!!!!

Not able to access the 10g RAC DB

Hi All,
I have installed 10G RAC on WIN2K box with 2 nodes. The installation was fine. I created a database with name "test". It created 2 instances "test1 on node1" and "test2 on node2". Now if i am trying to connect to "test", it fails. but if i use "test1" i am able to connect. How does the failover come into picture when i am using the instance "test1" which is running on node1 and it(node1) goes down. I am new to these, please help me.
Thanks in advance
Regards
Kavitha

All connections should be using the failover TNS entry which should look something like this in your tnsnames.ora file:
TEST=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=test1-vip.us.oracle.com)(PORT=1521))
(ADDRESS=(PROTOCOL=tcp)(HOST=test2-vip.us.oracle.com)(PORT=1521))
(CONNECT_DATA=
(SERVICE_NAME=TEST)
When you do a tnsping of the service, you should see the failover configuration, similar to:
tnsping TEST
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION= (ADDRESS=(PROTOCOL=tcp)(HOST=test1-vip.us.oracle.com)(PORT=1521)) (ADDRESS=(PROTOCOL=tcp)(HOST=test2-vip.us.oracle.com)(PORT=1521)) (CONNECT_DATA= (SERVICE_NAME=TEST)))
There are many different configurations for RAC failover and TAF. This is a basic example.
Marg.

Is there a way to use different NIC names in 10g RAC?

For example node 1 has ipge0 for private, ipge1 for private and node 2 has Solaris default e1000g0 and e1000g1? Or do interface names have to match on all nodes? I am not referring to IPs or subnets - just NIC names.
Here is some background.
This was a 2 node 10g RAC on Solaris that has been in operation for years. Node 2 experienced a corrupt root partition (OS, nothing to do with Oracle), so OS was reinstalled. After OS reinstall I copied /var/opt/oracle/*.* from node 1, changed them to reflect node 2 info, plus CRS related files from /etc/init.d, such as init.crsd, etc. This is shared Oracle home, so Oracle continued to run on node 1 just fine.
However, after crs startup nodeapps tells me "atlts04ra.atlts04.vip:ifconfig: status: SIOCGLIFFLAGS: ipge0: no such interface". Indeed, this interface does not exist on node 2.
So, is there a way to instruct oracle to use different interface names for nodes? Or will vipca ask for matching NIC names just like disk mount names have to match?
I want to avoid reinstallation of RAC because that will disrupt oracle database that has been running on shared oracle home all along.
Thanks.

Fzheng, I am very interested in your statement "however you can change the e1000g0 to ipge0".
You mean to say there is an OS script that will downgrade ipge0 interfaces to e1000g0?
I got some more information from SysAdmins yesterday. Apparently, when OS was reinstalled on node 2 after root partition corruption, they also patched it up to Solaris 10u9 (which by default created e1000g0-type interfaces). The first node still had 10u7 with ipge0 interfaces. We, the DBAs, were not aware of the upgrade. So, nodeapps cant start saying "no such interface"on node 2.
You are probably referring to script /usr/sbin/e1000g_transition.
Here is the description:
"DESCRIPTION
This script allows you to perform an optional driver upgrade
for the Intel PRO/1000 device present on this system from the \"ipge\"
network driver to the Sun standard \"e1000g\" network driver. The
e1000g driver include features such as link aggregation as well as
superior performance in most environments. Moving forward, e1000g
will benefit from new features as they become available, bug fixes,
and performance enhancements. The disadvantage is that some
applications configuration files may require modification to use
e1000g if they reference the ipge network interface.
This script must be run in single user mode.
This script will alter network interfaces and related system
configuration files. Configuration files for 3rd party applications
will NOT be changed. After running this script, applications present
on the system may require maintenance. The system may be in an
unsecured state. The effects of this script may be reversed using
the backout (-b) option."
So, if I understand you correctly, you are proposing to run this this script with the backout (-b) option on node 2, so interface names will match.
Is this correct?
Thanks.
Vladimir Grigorian.
http://vgrigorian.com

Shared Storage allocation for Oracle 10g RAC

Hi,
I am about to implement a Two Node Oracle 10g RAC on Windows 2008 (32-Bit) servers. We are going to use EVA4400 storeage and we have 600 GB for Oracle RAC and database.
I intend to follow the steps given in RACGuides_Rac10gR2OnWindows.pdf mentioned in Note 811271.1 (RAC Assurance Support Team: RAC Starter Kit and Best Practices (Windows)).
I would like to know how should I allocated the storage for OCR,Vote, Database and Flash Recovery Area. Meaning how many LUNs and of what size to be created and presented to both the servers. To start with I need to create a 25 GB database. We will be using Raw Device for OCR and Vote and ASM for Database and Flash Recovery Area.
Please advice.
Thanks,
Thiru

I am about to implement a Two Node Oracle 10g RAC on Windows 2008 (32-Bit) servers. Oracle 10g on Windows 2008 is not supported. Anyway installing a cluster as of today i would use a 64-bit operating system together with a 64-bit database. Everything else is not state-of-the-art anymore.
As of today i would go with 11g Release 1 (11.1.0.7.0) plus latest patches for Clusterware and ASM. Because you are using Windows 2008 you must use 11g Release 1 for the database as well. Bear in mind that Windows 2008 R2 is at this point in time not supported for 11g R1 or 11g R2 either.
I would like to know how should I allocated the storage for OCR,Vote, Database and Flash Recovery Area. Meaning how many LUNs and of what size to be created and presented to both the servers. This is said in the installation documents. Rule of thumb: At least three LUNs of 2 GB for OCR and three LUNs of 2 GB for Voting disk.
To start with I need to create a 25 GB database. We will be using Raw Device for OCR and Vote and ASM for Database and Flash Recovery Area.According to Oracles recommendations: Two disk groups: one for database files, the other for the flashback area.
But your setup may be different (more disk groups,....)
Ronny Egner
My blog: http://ronnyegner.wordpress.com

Max Connections to Oracle 10g RAC Instance

Hi,
We have IBM Websphere Application Server on one unix server which is connecting to a Oracle 10g RAC Instance which is on a different unix server through JDBC connection. They(Application Team) are doing stress tests, please tell me how many connections can a Oracle Database Allow simultaneously. They tested for 2000 connections simultaneously. It failed...This is urgent, they are on call please reply ASAP
Thanks,

Use Oracle Shared Server (the default is Dedicated Server),
I've shown JBOSS app developers how a little Dell desktop (256MB RAM, 1.7Ghz P4) can accept a 1000 app server connections (using Shared Server). While a big HP-UX server failed to accept 200 connections (using Dedicated Server).
Oracle RAC should easily be able to handle 100+ concurrent client OLTP connections per RAC node using Shared Server - assuming that each of the concurrent sessions are actually doing stuff and not just sitting there idle. (if 99.99% of the connections are idle, then even a little desktop Oracle database can handle well over a 1000)
Bottomline - you must have your primary focus and expertise on Oracle. On the the data tier. Not the app tier. The data tier is what scales the app tier. Not vice versa. Adding an extra app tier server does not enable the data tier platform to suddenly be able to run more SQLs, The app tier does not scale the data tier.
If you want performance and scalability, you must get the data tier right. App tier be damned as that is neither here nor there ito performance and scalability. This means Oracle expertise is required first and foremost.

10g RAC remote monitoring and services question.

IF I plan to offer one of my clients remote Dba services for 10g RAC- Standard Edition....do you necessarily have to use ASM to do so or is that just the Oracle push and I can actually use other file systems like Linux ext3, etc?
And if I have to use ASM how hard should it be for my Dba's to train themselves on it?
any help is appreciated.

From metalink
Can I use OCFS with SE RAC?
It is not supported to use OCFS with Standard Edition RAC. All database files must use ASM (redo logs, recovery area, datafiles, control files etc). We recommend that the binaries and trace files (non-ASM supported files) to be replicated on all nodes. This is done automatically by install.
Modified: 01-SEP-04 Ref #: ID-5748
And it's easy to manage those files, I think your DBAs just reading the doc can do that.

Oracle Pipes- 10g RAC?

Oracle Pipes is not working on 10g RAC?

"not working" is a very broad, sweeping statement to make. For all we know, you simply do not know how to use DBMS_PIPEs. Or maybe your code is simply buggy.
So if you expect a helpful response, you must help us first to understand what problem you are running into. This means at least explaining what you are doing using pipes (sample code will be great), and the actual ORA error messages encountered.

Sequence error in 10g RAC

hi,
i am using sequence to autogenerate unique numbers in oracle 10g rac(three nodes).
but the sequence numbers returned were not in order..This was creating a lot of confusion in oracle client.
the cache of the sequence is 20;if I set the cache to 0 so that the sequence will be in correct order.
if i must set cache to 20.how can i get the sequence number in order .
thanks & regards.
Zng

Default CACHE value is 20, so 7859 + 20 = 7879.
As Billy said above the sequnce quarantees by default the uniqueness of numbers, nothing more.
Do you really care what in one node you will have 7859, 7860,...,7878 and
7879,....7899 in another one ? Hardly it affects the logic of your application.
If it does there is ORDER clause in CREATE SEQUENCE statement:
http://download-uk.oracle.com/docs/cd/B10501_01/server.920/a96540/statements_615a.htm#2067095
Specify ORDER to guarantee that sequence numbers are generated in order of request. You may want to use this clause if you are using the sequence numbers as timestamps. Guaranteeing order is usually not important for sequences used to generate primary keys.
ORDER is necessary only to guarantee ordered generation if you are using Oracle with Real Application Clusters. If you are using exclusive mode, sequence numbers are always generated in order.
Rgds.

Oracle 10g RAC and Unix *rlogin* question

I support several 10g RAC databases, running on IBM pSeries servers using AIX 5.3. Our database and clusterware are 10.2.0.3 and 10.2.0.4.
I understand that user equivalence and rsh/ssh must be enabled in order for the RAC environment and clusterware to communicate across all of the cluster nodes.
My problem is a question being raised by our internal system auditors. The are requesting that the rlogin and exec commands for AIX be disabled, because they feel it is a security risk. Both commands prompt for a valid userid and password when they are used to remotely login or execute a command.
I have reviewed the RAC documentation online, and searched Metalink (I am not a Metalink expert, though!) as well as Google and can't find anything stating that rlogin and exec are specifically required in order for RAC to function properly.
Can anyone offer advice or their perspective on whether or not these two commands need to be enabled in order for RAC to function?
Thank you in advance for any assistance you can give to me.
Regards,
Mark

Hi Mark,
as far as my knowledge goes RAC does neither use rlogin nor exec commands.
After you setup the cluster Oracle communicates simply via. TCP (clusterware) and UDP (RAC) and is only sending and recieving messages. There is no need during runtime for a remote login.
So als ssh and rsh are solemnly used for installation and patching (not for communication).
Still Oracle recommends to leave them enabled, since it makes life easier than to enable ssh each time a patch is needed.
Sebastian

10G RAC security auditing

Hi,
I was asked to prepare a database security audit in my company. The target system is 10G RAC configuration with two nodes. What should my checklist contain? Which elements of the system must I verify?
On Oracle's web pages I've found the following document:
http://www.oracle.com/technology/deploy/security/pdf/twp_security_checklist_db_database.pdf
Is it enough? Can you advice me? Any help will be appreciated.
Regards,
Tim

Hi,
What is the purpose of this audit? Do you have any criteria? Or are you allowed to make up your own list?
My experience is databases hosting third party apps are usually completely unprotected because
- the application owner has the connect, resource and dba roles (or even more)
- the account has the password set to the user name.
Also if an application is not using bind variables, the system is sensitive to 'SQL injection'.
The document you posted outlines some basic measures, but it doesn't go into sufficient detail. It doesn't mention the password_verify function you can set up. It doesn't mention system privileges at all. It doesn't mention you should disallow telnet access, and disallow root to login remotely (ie one should su to root).
Etc, etc.
There is a whitepaper on OTN called 'Project Lockdown' written by Arup Nanda. It implements 3 or 4 times more measures.
Sybrand Bakker
Senior Oracle DBA

Is TAF creation must in 10g RAC

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