OWB RAC question

Our source and target databases are RAC servers. Is it possible to have OWB installed as single node and still use RAC capabilities of source and target database ?
Basically we are hoping to install OWB as single node and define source/target locations using sql*net. Has anyone tried this ? Does it work ?
Let me know.
Thanks
Madhavi

Hi,
We also have a 6 node rac where we settes up owb.
We went through a whole lot of problems but got it running finally(with service failover).
Basically you will need the binaries on all 4 of your physical nodes.
For the first node you can run through the normal installation (repository setu).
Thab you need to start the repository assistant on all other nodes in ordr to register them.
There are a lot of pitfalls with that installation and a lack od docunentation.
We've written an onstallation guide for an OWB rac setup where with we have now setted up 9 OWB repositories spreaded over 2 racs.
Just let me know if you require detailed information - maybe we can share our guide.

Similar Messages

OWB workflow question

I'm an OWB-newbie (using PARIS) and have a question about OWB workflows.
I want to create several mapping workflows.
All the mapping workflows should send a mail with the outcome of the workflows (success, error, warning) to an administrator.
I don't want to always code the same mail activity with the same parameter values.
So my idea is to write one subprocess which handles the mail-routine with some input parameters (calling workflow-name, process state (success, warning, error)).
In the subprocess I want to test the input parameter "process-state". If the value is 0 (success) then a mail with the workflow name as subject should be generated incuding an static text e.g. "mapping successful". If the value is 1 then "mapping warning" and so on.
What OWB activity has to be choosen for testing the input parameter "process-state" like an if-then-else construct or a case-construct?
How can the value of the input parameter "workflow-name" be included in the mail-body?
Regards
Martin

To my experience, using the OWF for these things is not very practical. I would suggest that you would make your own PL/SQL procedude that does this, and then call that procedure from within the actual mapping (post-mapping), using the values you have there.
This might not be what you want, however. I simply find the email capabilities of OWF too limited for actual work.

Oracle RAC Question

Question about oracle rac. lets say we have a 3 node RAC database and our tnsnames.ora file is configured to point to node 1. If an application is connected to the database using the database connection information that is on the tnsnames.ora file (pointing to node1), and node 1 is down, how does the application know to point to node 2 or node 3 to connect to the database?

If you didn't configure node2 and node3 as failover nodes, only the currently connected sessions would failover by the other nodes.
New connections are no longer possible.
Sybrand Bakker
Senior Oracle DBA
Oracle is not about rocket science. It is about being able and willing to read documentation.

OWB general questions for effective use.

Hi all,
I have been using OWB for a while now, and am getting to the point where I want to make sure I am using it effectively.
For example, how does one decide what to include in one project, or to split it up into multiple projects? I am loading a warehouse, and so far I am only loading raw data into tables.
My next step will be to perform ETL on the raw data and start forming more structured warehouse data. Would that step be better contained in a separate project? Would I need to repeat the definitions of the tables in the loading project? Should I just keep the whole thing in one project? The loading project is quite large, as we have raw data from many sources, and it seems to get one file in takes about 5 - 7 OWB objects (flat file, ext table, 2 - 3 mappings, process flow, 1 - 2 tables.)
So I have dozens of mappings, tables, etc.
Even though much of the data comes from different places, it is generally used together by the end users, and the ETL will likely also need to use most of it together.
Is there any "Best Practices" posted anywhere?
Another question that has come up is this: It seems the idea is to create the warehouse structures completely in OWB and deploy to the DB. However OWB doesn't allow for a full table definition, for things like Triggers, or for advanced features due to a later DB version.
So does one just create a "phantom" entry in OWB that is never deployed, and then create the actual table manually, or deploy and then modify manually to add the trigger?
Or are we not supposed to be using DB triggers, and instead control everything through OWB?
Any insight would be appreciated.
Thanks

Hi
I think the kind of questions you are asking are more aimed at methodology's not so much OWB. There are plenty of sites you can get this kind of info from one but not necessarily the best being <http://www.ittoolbox.com/>
In any case we use three projects and multiple schemas
project & schema 1 is used to collect data quickly from multiple sources
project & schema 2 normalizes the data (acts as the storage repository)
project & schema 3 is where the datamarts exist (de-normalized data)
this approach allows you to isolate your integration layer from your reporting layer. most changes only affect one of the layers, not all.
as far as creating your structures in owb is concerned I seen no problem, provided you are using a good ER tool and have ironed out any potential problems.
I have certainly created triggers manually and added them after deployment, but in most cases you can use Transformations, post-mapping, and pre-mapping processes to do the same thing, after all the data should only get into the target through a mapping. If it gets in any other way, you have a hole in you bucket.
Chris

RAC Questions

Hello,
I have couple of questions
1) In a two node RAC, if we lost the interconnect between two nodes which one will be part of cluster or which node is evicted? (I think the one with lowest node number will survive, but i am not sure what the "lowest node number" mean)
2) At any given point of time how do we know which node is a master node in a multiple node RAC?
3) I have regular backups of my OCR and VOTEDISKS, but unfortunately if we loose current copies and backup copies of both, how to recover from this kind of scenario? Do we need to rebuild the cluster or do we any other alternative?
4) If my OCR disk is on ASM, if i want to manually take a backup using dd command, is it possible ? as dd is at OS level but as it doesn't undersatnd the ASM path name in "if", how do we do this?
Thanks

925967 wrote:
Hello,
I have couple of questions
1) In a two node RAC, if we lost the interconnect between two nodes which one will be part of cluster or which node is evicted? (I think the one with lowest node number will survive, but i am not sure what the "lowest node number" mean)The node which is added in the first place to the cluster, which means node #1.
2) At any given point of time how do we know which node is a master node in a multiple node RAC?You can use this command grep -i "master node" ocssd.log to find the master node. Another common assumption is to assume that the node that contains the OCR backup is the master node but its not always true.
3) I have regular backups of my OCR and VOTEDISKS, but unfortunately if we loose current copies and backup copies of both, how to recover from this kind of scenario? Do we need to rebuild the cluster or do we any other alternative?If you have lost OCR and have no backup, there is still a way to recover it and its on MOS. I don't have the note with me handy so you got to search for it. I shall see if I can find it and update the reply later.
Update: Have a look at this MOS note 399482.1.
4) If my OCR disk is on ASM, if i want to manually take a backup using dd command, is it possible ? as dd is at OS level but as it doesn't undersatnd the ASM path name in "if", how do we do this?OCR backup by DD? Are you sure you talking about the right thing? The only option where DD was used in the previous versions was for Voting Disk. I never recall that this method was used for OCR as its always auto backed up. The answer to your question in the context of Voting disk is that you can't do it and Oracle has very clearly mentioned attempting to do so would end up in the corruption of the Voting Disk and if you attempt to do so for OCR, I believe the answer remains the same.
HTH
Aman....
Edited by: Aman.... on Aug 3, 2012 9:56 AM

RAC question

Hi,
Version 11g
I have RAC 11gR2 on two nodes with ASM.
The DB name is : cstrprd
On the first machine the asm instance is : +ASM1 and the instance name is cstrprd1
On the second machine the asm instance is : +ASM2 and the instance name is cstrprd2
The question is regarding /etc/oratab
# This file is used by ORACLE utilities. It is created by root.sh
# and updated by the Database Configuration Assistant when creating
# a database.
# Multiple entries with the same $ORACLE_SID are not allowed.
+ASM2:/u01/app/11.2.0/grid:N # line added by Agent
cstrprd:/u01/app/oracle/product/11.2.0/CSTOREPRD11gR2:N # line added by AgentThe last two lines created by root.sh
I would like to know if its OK that the name of the DATABASE (cstrprd) was written to the /etc/oratab as you can see above ,
and not the name of the INSTANCE as follow
cstrprd2:/u01/app/oracle/product/11.2.0/CSTOREPRD11gR2:N Thanks

Hi,
if your entry
cstrprd:/u01/app/oracle/product/11.2.0/CSTOREPRD11gR2:Y like this then if node reboots it will start the entire database including 2 instances (cstrprd1,cstrprd2)
suppose if your entry
cstrprd1 :/u01/app/oracle/product/11.2.0/CSTOREPRD11gR2:Y like this then , if node reboots only cstrprd1 instance will come up on first node . vice versa...
Note : suppose if u use instance name in oratab , it will be helpful when using . oraenv .
. oraenv
ORACLE_SID = [oracle] ? cstrprd1
just give instance name , it will take the ORACLE_HOME automatically otherwise u have to give ORACLE_HOME also manually ...

Solaris 10 + Oracle 10gR2 RAC question

Hello everyone
Has anyone come across the case where the CRS services of Oracle cause
the public interface to get turned off and then restored at random
time intervals? To elaborate, we have a 2 node cluster database.
Solaris 10, Oracle 10gR2 RAC with patch 10.2.0.3 applied. No SUN
clustering is involved. When the cluster software is down (nodeapps,
asm, database instances all down) /var/adm/messages show nothing. When
we start nodeapps on the 2 nodes(thus initiating some form of
communication between the nodes), at random time intervals we get
"interface ce0 turned off and interface ce0 restored" in /var/adm/
messages. When we check the status of the RAC, we see that one node's
vip has been assigned to the other. This on/off behaviour of the NIC
can be eliminated only if we continuously PING it from a another
client in the network.
As a matter of fact, the RAC and the RDBMS work perfectly when we keep
pinging the 2 nodes from an other client on the network. We even
managed to run a long batch job, distributed on cluster managed
services on the 2 instances, and it completed after 9 hours without
any problems.
Does anyone have a hint on this behaviour? Is there some sort of
timeout for the network cards? Some power saving features? Googling
around I came across the new Containers feature available on Solaris
10. Is there a way that I can verify that either RAC or the RDBMS is
running in "container" mode ( since the solaris and Oracle
installation was not performed by me)? Any other ideas?
Thank you for reading

Im an Oracle guy - not the SA type -
But on ours - the SA configured this cluster incorrectly. We use veritas. instead of making ipmp groups for the interfaces - he built the cluster according to veritas docs. That is - he has two publics - on difference interfaces and different privates on different interfaces. oracle can only two interfaces - no matter if its a ipmp group or a device name. one is used for private- the other is used for public - So sure the veritas cluster filesystems will survive - but the Oracle Cluster will not - nodes will reboot -
Is your system set up incorrectly as i described above? if it is - a quick test would be - turn down the other interfaces - and only leave the two interfaces you mention above up that you configured for Oracle CRS
This other sharp sa was able to go through the arp table and see duplicate IPs - and the routing was attempted via an interface that oracle doesnt see. You can not define two different interfaces public - and two different interfaces for private -

A non-RAC question for the experts: Clusterware + ASM

Hi
We have a 2-nodes cluster in production.
It's an active/passive cluster with a cold failover using SUN Cluster.
There is only one Oracle 10G single-instance database (DB1), running on node #1, that use ASM to access the SAN (it's raw devices).
We want to add a third nodes to move to a 3-nodes cluster, that would have 2 separates single instance Oracle 10g database
node #1: DB1 with ASM (the existing database, existing raw devices)
node #2: cluster passive node
node #3: DB2 with ASM (new additional database, new raw devices)
All nodes are connected to the same SAN.
We' want to use Clusterware instead of SUN Cluster.
The single-instance databases, the listeners and the ASM instances would be protected by Clusterware using "application VIP" (not oracle-vip).
It's not RAC ! but in the future both database might become RAC (but that's not the need today)...
My concern is about ASM !
Do I have to install an ASM instance on each node (just like in RAC) ?
Or may I just configure clusterware to ensure there is only ASM instance running on a node ?
Is it possible to have the ASM instance of node #1 and the ASM intance of node#2 that access the same SAN & raw devices ?
In the case DB1 & DB2 fail over to node#2, the unique ASM instance must see the raw devices of both databases, is this possible ?
Do I have to destroy the curent ASM configuration of DB1 to build the new one, or can I just add new raw devices and share tem across all nodes ?
Thanks for your answers.

Hi,
Thanks for the answer
I found this very interesting doucument but it does not go into enough details about ASM, which is my concern.
I found in the Oracle 11g documentation a statement which say that clustered ASM instances for single instance database do not need to talk each other as long as they do not handle the same diskgroup (Figure 1.3 ; http://download.oracle.com/docs/cd/B28359_01/server.111/b31107/asmcon.htm#i1021337) . Otherwise, it must be clustered. It would also be a problem for me when DB1 and DB2 are on the same node. I would need two different ASM instance, on the same node, which is not a good situation.
What happen when I start an ASM instance on node #3 to access raw devices already in use by node # 2.
I think I need to start from node #1 and change some ASM configuratoion to make it cluster-aware.
Next, I would add a second clustered ASM instance on node #2, and so on, to make sure that all ASM instances of all nodes can access the same diskgroup, and thefore being able to re-use the existing database on node #1 as well as creating a new one one node #2 (all on the same SAN)

OWB SDK question

Hi,
I want to create my own meta data (Tables) in OWB repository. I assume I can use the SDK to do that. Can I create a Table with a XMLType column? How do I locate that Table in the OWB repository? Will the Table be created in OWBSYS account? Can I create a view based on that Table?
Thanks,
Denny

To my experience, using the OWF for these things is not very practical. I would suggest that you would make your own PL/SQL procedude that does this, and then call that procedure from within the actual mapping (post-mapping), using the values you have there.
This might not be what you want, however. I simply find the email capabilities of OWF too limited for actual work.

Newbie RAC question

I have 3 production database servers with 2 databases on each server (6 databases total). Can I set up a RAC environment with just 1 additional node/server? Meaning can I have that clustered server serve all 6 database services while transparent to the app? I hope this make sense.
Thanks.

Hi,
Yes you can clustered the 3 servers that you have and cluster all instances.
cheers

ODI/OWB scripting question

Hi all,
I new to ODI and would appreciate some guidance. I have developing a substantial ETL environment using OWB(10g) and have now been directed to change it over to ODI(11g).
In OWB we had the OMB+ and TCL scripting capability to create and modify repository objects. Anything that could be created or modified in the GUI (such as OWB Mappings or Process Flows) could be done with OMB+ scripting. With this, I could perform mass changes to the mappings.
Does ODI support the same sort of design-time scripting capability? I understand that ODI uses Jython and Java, but so far, everything I have seen on these refers to run-time scripting. I would like to be able to create or modify Interfaces and Packages using the scripting API.
Can someone point me in this direction?
Thanks in advance,
Philip

Have a look at the groovy console in 11.1.1.6 there are some improvements that make scripting easier....
Some recent postings;
https://blogs.oracle.com/warehousebuilder/entry/odi_11g_getting_scripting_with
https://blogs.oracle.com/warehousebuilder/entry/odi_11g_scripting_the_model
https://blogs.oracle.com/warehousebuilder/entry/odi_11g_expert_accelerator_for
Cheers
David

ASM + RAC questions

How many DBs i should have on 2 node RAC environment? How this work?
What are the options to start & shutdown the ASM?

Do you have 30 databases that are single instance database that you are looking to place into your two node cluster?
What are the memory and processor requirements of your 30 databases? Does your cluster have suitable memory and processors to handle all 30 databases?

OWB Config question

Hi
When I have different design repository for Development,Unit Test and Integration Test. IS it advisable to use different runtime repository for each one or we can use same the runtime repository for all environments. What is the best practice.
Thanks
Balaji

As of now, I would recommend multiple runtime repositories. For details, see the thread 'One or more runtime repositories'.
The next major release (November 2004) will have multi-deployment capabilities and will enable users to maintain a single design with multiple runtime environments.
Regards:
Igor

Running OWB on 6 RAC databases on 4 shared nodes

Hi everyone!
I was wondering if anyone can help with a question I have around multiple OWB installations on RAC?
Background:
We are migrating 6 independent data warehouses / data marts onto one Exadata box. This machine has got 4 nodes, across which we will run 6 separate databases using RAC. Each database will span across all 4 nodes, and each of the databases will contain one of the independent data mart / data warehouses.
We understand that we will probably need to run 6 separate control center services on each node, and that there may need to be some fiddling around with log file names to get them all to start properly.
However; the question is where to install the OWB binaries!?
In our understanding, we need one set of OWB binaries per database, i.e. 6 in total. The actual databases will be run from just one set of local Oracle Database binaries on each RAC node, which means only four database binaries in total will be used to run 6 RAC databases across our 4 nodes.
Problem is, this means that there won't be enough OWB binaries to go around!! (6-4 = 2 missing!)
One alternative is to have 6 Oracle homes on each RAC node, i.e. one home per RAC database. I'm not a RAC expert - maybe this is even the preferred way of setting up the databases, regardless if we use OWB or not?
Comments / suggestions would be much appreciated!
Cheers
Edited by: 817871 on 03-Dec-2010 03:25

Hi,
We also have a 6 node rac where we settes up owb.
We went through a whole lot of problems but got it running finally(with service failover).
Basically you will need the binaries on all 4 of your physical nodes.
For the first node you can run through the normal installation (repository setu).
Thab you need to start the repository assistant on all other nodes in ordr to register them.
There are a lot of pitfalls with that installation and a lack od docunentation.
We've written an onstallation guide for an OWB rac setup where with we have now setted up 9 OWB repositories spreaded over 2 racs.
Just let me know if you require detailed information - maybe we can share our guide.

Configuring our RAC environment Questions

The environment consists of Sun Solaris 10, Veritas, and 10g RAC:
Questions:
I need to know the settings and configuration of the entire software stack that will be the foundation of the oracle RAC environment....Network configurations, settings and requirements for any networks including the rac network between servers
How to set up the solaris 10k structures: what goes into the global zones, the containers, the resource groups, RBAC roles, SMF configuration, schedulers?
Can we use zfs, and if so, what configuration, and what settings?
In addition, these questions I need answers to:
What I am looking for is:
-- special hardware configuration issues, in particular the server rac interconnect. Do we need a hub, switch or crossover cables configured how.
-- Operating System versions and configuration. If it is Solaris 10, then there are more specific requirements: how to handle smf, containers, kernel settings, IPMP, NTP, RBAC, SSH, etc.
-- Disk layout on SAN, including a design for growth several years out: what are the file systems with the most contention, most use, command tag depth issues etc. (can send my questionnaire)
-- Configuration settings\ best practices for Foundation suite for RAC and Volume manager
-- How to test and Tune the Foundation suite settings for thru-put optimization. I can provide stats from the server and the san, but how do we coordinate that with the database.
-- How to test RAC failover -- what items will be monitored for failover that need to be considered from the server perspective.
-- How to test data guard failures and failover -- does system administration have to be prepared to help out at all?
-- How to configure Netbackup --- backups

Answering all these questions accurately and correctly for you implementation might be a bit much for a forum posting.
First I'd recommend accessing the Oracle documentation on otn.oracle.com. This should get you the basics about what is supported for the environment your looking to set up, and go a long way to answering your detailed questions.
Then I'd break this down into smaller sets of specific questions and try and get the RAC axters on the RAC forum to help out.
See: Community Discussion Forums » Grid Computing » Real Application Clusters
Finally Oracle Support via Metalink should be able to fill in any gaps int he documentation.
Good luck on your project,
Tony

OWB RAC question

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