Oracle RAC and Datastage

Could anyone tell me If you have some Best Practices with Oracle RAC and Datastage ETL. I am concerned about performace of ETL loads into oracle database......

http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/bus_intl.htm#sthref2435
Your answers are just a few clicks beyond the URL below.
http://tahiti.oracle.com

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Need to understand basics of Oracle RAC and Grid technology, for training

I need to understand Oracle RAC and Grid infrastructure, from a manager's / training perspective.
I see links here and here, so a couple questions:
- what's the basic difference from a layman's (e.g., a manager's) perspective ?
- What training options are available for a generic 11g DBA to learn this new technology ? I've seen this course from an Oracle partner ("Course:Oracle 11g: RAC and Grid Infrastructure Administration Accelerated Release 2"), for a boat load of money, for 5 days I think. So we're looking for something a little more reasonable (and accessible), e.g., books, online, etc.

Wm Peck 1958 wrote:
I need to understand Oracle RAC and Grid infrastructure, from a manager's / training perspective.
I see links here and here, so a couple questions:
- what's the basic difference from a layman's (e.g., a manager's) perspective ?
- What training options are available for a generic 11g DBA to learn this new technology ? I've seen this course from an Oracle partner ("Course:Oracle 11g: RAC and Grid Infrastructure Administration Accelerated Release 2"), for a boat load of money, for 5 days I think. So we're looking for something a little more reasonable (and accessible), e.g., books, online, etc.
For a very basic definition, RAC is technology that is used by the database and GI is the infrastructure that makes RAC work. In a forum reply, that's probably all what can be said about both. For a very lengthy answer, you should read the links that you have quoted.
For #2, the course that you are looking at is called Accelerated as it combines two courses in a single week training-RAC(4) and GI(3). So it's a 7 day curriculum that one would be doing in a 5 day course and that should justify its cost. But let me say, it's a really really good course. But on the other side, it can be quite overwhelming for someone who doesn't know about these technologies already. So I shall suggest that you send your team to each course individually and probably after doing some homework . They can start reading the following books,
Pro Oracle Database 11g RAC on Linux
https://www.mheducation.co.in/html/9781259004063.html
And this doc link,
Oracle Database Online Documentation 11g Release 2 (11.2)
Aman....

Oracle RAC and datacontrol

Hello, I have an Oracle RAC 10gR2 with 2 nodes on Suse Linux Enterprise Server 10. When I enter on the enterprise manager database control (no grid control). I see the follow message:
"Availability calculations for the cluster database target are disabled. Please enable the DBMS JOB EMD_MAINTENANCE.EXECUTE_EM_DBMS_JOB_PROCS for Database Control."
What is it? How can I clean it?
Thanks in advance.

Check out MOS note :
What is EMD_MAINTENANCE.EXECUTE_EM_DBMS_JOB_PROCS dbms_job and how to Remove / Re-create it [ID 444033.1]
Regards
Rajesh

Oracle RAC and Standards

Does anyone know if Oracle RAC is part of any emerging Grid standards?

Hi Eric
Isn't RAC a middle to reach the grid computing goals ?
“A computational grid is a hardware and software infrastructure that provides dependable, consistent, pervasive, and inexpensive access to high-end computational capabilities.” by Carl Kesselman and Ian Foster in “The Grid: Blueprint for a New Computing Infrastructure,”

Oracle rac and TDE?

We are running oracle rac on 10.2.0.3 linux Itanium platform. I am setting up TDE for the first time and I setup my wallet location to be on an ocfs file system so that each node in the cluster will have access to the key. Is that all we will need to do and is this a supported configuration for TDE in a rac environment?
Do you have to open the wallet on each instance during instance startup when running rac?
Also we have a physicla standby server configured and I setup the same wallet location on the physicla standby and copied the wallet file over, Is that all we need to do for the standby server?
Thanks.

Peter,
Good info and your video makes everything look easy.
In addition to the encrypted wallet file (ewallet.p12), I also have a cwallet.sso file in the local file system (not ACFS) on both RAC nodes of my Primary and both Standby nodes.
If I start the database and then run: SELECT * FROM V$ENCRYPTION_WALLET; it says the wallet status is open. However, as soon as a user tries to connect through our application (using jdbc), I get the "ORA-28365: wallet is not open" errors in the alert log. So then I have to run: ALTER SYSTEM SET ENCRYPTION WALLET OPEN IDENTIFIED BY "<Wallet Password>"; on each node and then users can connect through the application.
Any ideas why auto-login doesn't work and why everything is grayed out on the Wallet Tab drop down menu in OWM?
Thanks.

Database replication between Oracle RAC and Oracle Standalone DB

Hi,
We have currently 4 node RAC environment and Oracle RAC implementation with 4 Oracle instances. We want to move the one instance and make it Standalone with Oracle database due to availability issue. Thus we will remain with 3 nodes on the RAC database and one Standalone database. We want to implement Oracle replication on this solution, where partial database of RAC environment needs to be replicated to Standalone node.
We will have Oracle 9i database server for both RAC and Standalone machine.
The partial data that we are looking for replication are of size 25GB. Some of questions we have:
1. Is there any other replication mechanism apart from Materilzed view for this solution?
2. Is it feasible to sychronize around 25GB data between servers?
3. What can be estimated time for refresh or Synchronization?
Thanks in advance for help.

The methods that we are evaluating currently for this replication are:
1. Multi Master replication
2. Oracle 9i Datagaurd.
Please let me know if we need to look for some other methods of replication also.

Database replication between Oracle RAC and Oracle Standalone DB in 9i

Hi,
We have currently 4 node RAC environment and Oracle RAC implementation with 4 Oracle instances. We want to move the one instance and make it Standalone with Oracle database due to availability issue. Thus we will remain with 3 nodes on the RAC database and one Standalone database. We want to implement Oracle replication on this solution, where partial database of RAC environment needs to be replicated to Standalone node.
We will have Oracle 9i database server for both RAC and Standalone machine.
The partial data that we are looking for replication are of size 25GB. Some of questions we have:
1. Is there any other replication mechanism apart from Materilzed view for this solution?
2. Is it feasible to sychronize around 25GB data between servers?
3. What can be estimated time for refresh or Synchronization?
The methods that we are evaluating currently for this replication are:
1. Multi Master replication
2. Oracle 9i Datagaurd.
Please let me know if we need to look for some other methods of replication also.
Thanks in advance for help.

ManojMac wrote:
The partial data that we are looking for replication are of size 25GB. Some of questions we have:
1. Is there any other replication mechanism apart from Materilzed view for this solution?Streams is another option
2. Is it feasible to sychronize around 25GB data between servers?Sure. Depending on the rate of change, your latency requirements, whether the standalone database has the horsepower to apply all the changes generated by to other three nodes, etc.
3. What can be estimated time for refresh or Synchronization?Depends on the architecture, the network connection, whether you are doing incremental refreshes, etc. And it depends on what time you're measuring-- you might be measuring the latency between the RAC cluster and the standalone database, you might be measuring the time it takes to incrementally refresh a single materailized view when there have been no changes, you might be measuring the time it takes to do a complete refresh of an entire refresh group, pulling 25 GB of data over the network.
The methods that we are evaluating currently for this replication are:
1. Multi Master replication
2. Oracle 9i Datagaurd.DataGuard is not an option if you only want to replicate a subset of the data. The two realistic options are materialized views and Streams. Are you anticipating that you will be making changes on both nodes? If not, you can use simple materialized views rather than multi-master replication.
Since 9.2 is not longer covered by Premier Support, are you planning to upgrade to a supported version in the near future? In particular, Streams works a lot better in later versions of the database.
Justin

Install SAP cluster ORACLE RAC and SCS

I need to install SAP ECC SR3 in an environment in cluster.
O.S: Linux Red Hat B.D: Oracle 10.2.0.4
I am trying to follow the official manual of SAP, but this very confused, would like the you aid.
The environment is the following one:
2 machine (Node A and Node B)
1 area of storage shared for datafiles of Oracle. /oracle/PRD.
It goes also to be installed ORACLE RAC.
My doubt is the following one: Which the steps that I have that to follow so that everything of certain.
When I go to install ORACLE RAC? Before, later or during the installation of SAP?
I go to need to install the central office services (SCS) in the two servers? Or only in one?
Somebody could help with some document or detail me of what I go to need to make?
Please!
Thanks!

Hi Alan,
Please go through this link [http://www.oracle.com/newsletters/sap/docs/wp-o10g-rac-config-unx.pdf] Hope this should help you.
Thanks and Regards,
Damanaidu J

SC 3.1/3.2 Oracle RAC and EMC replication

hi,
i need to cluster existing 2 node Oracle RAC for disaster recovery. The secondary site is about 180 km away, there is another site 10 km away which is planned to be use for bunker replication (SRDF/STAR). Is it possible to build such topology with Sun Cluster 3.1/3.2? Network connection to all sites is provided (min. 10Gbp).
What is needed to complete this task with SC?

I would recommend that you read my Blueprint from April 2006 (Architecting Availability and Disaster Recovery Solutions) as this has a lot of background on the subject.
First, you will need to implement it as a two node cluster plus a single node disaster recovery system. Ideally, the two node cluster would be configured between the two 'local' sites, i.e. with the site that is 10Km away. The remote site, at 180Km, would then be used for the disaster recovery system.
The recently announced Sun Cluster 3.2 Geographic Edition adds support for SRDF, so you could use Sun Cluster 3.2 and Geo Edition with SRDF for this. I would add that disk block based replication is not ideal for this as it does involve a lot of unnecessary replication data traffic compared with something like Oracle Data Guard. This would be my preferred option, although this is not currently integrated with Geo Edition.
If you need any more info or help, please post again.
Tim
---

Which is the difference between Oracle RAC and Oracle Clusterware?

Hi all, maybe this is a stupid question, but I've read the documentation, and still don't understand which is the difference between RAC and Clusterware.
Can anybody explain it to me?
Thanks in advance!

RAC is database option part of Oracle Database software needed to have database running in cluster mode; see http://download.oracle.com/docs/cd/E11882_01/server.112/e16508/glossary.htm#CNCPT2076.
Clusterware is separate software needed to run Oracle Database in cluster mode: you can use Oracle Clusterware without Oracle Database but you cannot use Oracle Database with RAC option without Oracle Clusterware.
See http://download.oracle.com/docs/cd/E11882_01/rac.112/e16794/intro.htm#BABCHEEE.
Edited by: P. Forstmann on 19 nov. 2010 19:11
Edited by: P. Forstmann on 19 nov. 2010 19:11

Oracle RAC and Solid State Drive

Can we use Solid state Drive with Oracle RAC as a replacement to SAN?
Regards,
RJiv.

burleson wrote:
Hi,
Can we use Solid state Drive with Oracle RAC as a replacement to SAN?Yes, and it works especially great for RAC clusters:
http://www.rampant-books.com/t_rssd_12_removing_bandwidth_saturation.htm
BTW, SSD is now offered by Sun, EMC, and lots of other mainstream vendors, and the prices are falling rapidly:
http://www.dba-oracle.com/include_ssd.htm
Hope this helps . . .
Donald K. Burleson
Oracle Press author
Author of "Oracle Tuning: The Definitive Reference"
http://www.rampant-books.com/book_2005_1_awr_proactive_tuning.htm
Don,
I know you and your company has done lot of research on (RamSan+Oracle RAC), but it will be nice if you can comment on (FusionIO+RAC) solution. I know no one has used it so far, but I think it is viable, so what do you think?
The reason why I think FusionIO is a good solution for small DBs because it's not a Flash Drive and it costs less than the other SSD solutions available in the market. Also you do not want to buy SAN for small DBs (<250 GB).
But I am too sure about the actual configuration at this point like - gigabit vs 10 gigi NIC, type of interconnect, Fiber Channel, etc.
So I would really appreciate if you can provide some insight.
Thanks in advance....
Disclaimer: I do not work for FusionIO - http://www.fusionio.com/

Oracle RAC and Standard Edition 11g R2

Hi,
Our application is tested with Oracle 11g r2 enterprise edition on RAC (inhouse).
A customer is asking whether he can use Oracle 11g r2 standard edition on RAC.
I need a gut feel on this, as our application does not use any of the enterprise edition features. Also our application has been successfully tested with oracle 11g r2 standard edition on single instance.
This is a big account and i need reliable answer.
Thanks in advance,
Krishna

Hello,
Yes, it is possible to have Oracle RAC with 11gR2 standard edition.
You can take a look at this http://docs.oracle.com/cd/E11882_01/license.112/e10594/editions.htm
Krishna Nazare
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Registered:      Jul 11, 2011
Total Posts:      16
Total Questions:      8 (8 unresolved)
Name      Krishna
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Occupation      Software Architect Please follow the forum etiquette by marking your questions as answered by providing appropriate points if you feel that they have been answered. Please keep the forum clean !!

Oracle RAC and ASM for SAP in SLES

Hello,
We are installing our SAP ERP with Oracle RAC 11.2.0.2 on SLES 11 x86_64. According note 527843 (Oracle RAC support in the SAP environment), this is supported for SAP. But as a requirement ASM Cluster File System must be setup.
But when Oracle Grid is installed, ACFS installation returns the following error:
ACFS-9459: ADVM/ACFS is not supported on this OS version: 'sles-release-11.1-1.152'
So Oracle GRID has been installed without ACFS, so we will not be able to use Oracle Clusterware for providing high availability of SAP.
As this is supposed to be a feasible combination (Oracle RAC 11.2.0.2 with ASM on SLES 11 SP1, Netweaver 7.0), I'm wondering if it is a bug, a lack of documentation or something I'm missing.
Kind regards,
Fermí

Read this below Oracle Note:
ACFS not supported on certain platforms [ID 1075058.1]
oracle@node1:~/app/oracle/product/grid/log/node1> tail -1 alertesiha.log
[client(14083)]CRS-10001:ADVM/ACFS is not supported on SUSE
Then these can be ignored, since ACFS/ADVM may not be supported for your platform. As of this writing, Sun, AIX, SuSE 10 are all supported in 11.2.0.2 only. HP-UX, SuSe 11 and RH6.0, as well as Oracle UEK ((2.6.32-100*) are not yet supported in 11.2.0.2. Keep in mind that this does not prevent your Grid Infrastructure stack (Clusterware and ASM) from starting. This is just an informational message for these platforms
Extract from SAP Note:
RAC 11.2.0.2 (x86 & x86_64 only):
Oracle Clusterware 11.2.0.2 + ASM/ACFS 11.2.0.2 (currently only for SLES10, RHEL5, OL 5.x (without UEK))
Thanks
Srikanth M

Infrastructure suggestion for Oracle RAC and Dataguard

Hello,
We are working on migration business proposal and need to suggest HA and DR infrastructure solution with Oracle 11G databases. I am thinking to suggest Oracle 11g RAC and Dataguard to meet this requirement. We also wanted to cover Dev, Test and Pre Prod along with Prod in new environment. Can someone suggest cost effective, stable and scalable infrastructure for this requirement
Best regards,
Venkat

In terms of cost ? Perhaps.
In terms of performance? NO.
Bear in mind I'm not trying to sell anything here, but in my experience hardly anything matches the performance of Exadata. It has specific features for the DB such as de iDB protocol which enables the offloading of queries to the exadata storage servers. More unique features include: storage indexes, HCC compression, smart flash cache... It's all a matter of how much you want to spend.
Yes, you can have all your servers on the same box if you want, just make sure it is not a single point of failure. (Have appropriate safeguards in place in case of power failure, Data center catastrophes, etc). In case of LPARs on the same box, be aware of one server over-utilizing resources which would affect the other LPARs (configurable).
More info on Exadata: http://www.oracle.com/technetwork/server-storage/engineered-systems/exadata/dbmachine-x3-twp-1867467.pdf
If your company has a tight budget you might also look at your options with Database appliance: http://www.oracle.com/technetwork/server-storage/engineered-systems/database-appliance/documentation/oracle-db-appliance…
Database appliance has more flexibility in terms of licensing and it's also a complete hardware solution from oracle for Databases.
Regards

Oracle RAC and VMWARE demo

Does anyone have the Oracle RAC VMWARE demo. I lost it. I loved that thing. Oracle use to have it, now no more. Any help would be appreciated
[email protected]
Thanks

Check following link
http://www.oracle-base.com/articles/10g/OracleDB10gR2RACInstallationOnCentos4UsingVMware.php

Oracle RAC and Datastage

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