Changes between a RAC(Objects) and NON RAC

Hi all,
I want to findout what all the different things to be considered when an application is made to run on RAC env.
For eg: I found there is a difference between the way the Sequences are used in a RAC env from Non RAC.
Are there any guidelines for the Objects used in RAC?
Also can you point me to any doc related to tuning the interconnect as we are identifying wait events related to cluster "Cluster was consuming significant database time"
Thanks.

Hi hyddba,
Absolutely, at database level for application has no changes at objects.
At application code has changes to benefit aplications from failover TAF and FAN events.
http://www.oracle.com/pls/db102/to_toc?pathname=rac.102%2Fb28759%2Ftoc.htm&remark=portal+%28Getting+Started%29
Regards,
Rodrigo Mufalani
http://mufalani.blogspot.com

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Hi all,
I have question.
Presently we are following RMAN duplicate database cloning from RAC asm to (non RAC)non asm database of size 1TB.
If suppose if our databse is 3TB or More. then is there method that we can minimize the cloning time. If so please let me know.
Thanks
Maverick

Hi;
Presently we are following RMAN duplicate database cloning from RAC asm to (non RAC)non asm database of size 1TB.
If suppose if our databse is 3TB or More. then is there method that we can minimize the cloning time. If so please let me know.We have 4 Tb RAC+ASM and we also follow same method. I belive there is no faster method, at least we can not find :)
Regard
Helios

Open 10g/11g RAC database in Non RAC Mode

Dear Friends,
How i open 10g and 11g RAC database in Non RAC Mode (open single instance in order to perform upgrade)
Later i will convert the upgraded DB to RAC DB
Regards,
DB

user564706 wrote:
Dear Friends,
How i open 10g and 11g RAC database in Non RAC Mode (open single instance in order to perform upgrade)
Later i will convert the upgraded DB to RAC DB
Regards,
DBEdit spfile and set cluster_database=false before starting database in upgrade mode(optionally you can unset other cluster parameters).
So you upgrade using only 1 instance of database.
Once the upgrade is finished start the other instance as well and set cluster_database=true
Also see preupgrade process - http://docs.oracle.com/cd/E11882_01/server.112/e23633/upgrade.htm#i1011979
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What is the difference between data base objects and runtime objects

What is the difference between data base objects and runtime objects

Hi raja,
data base objects means u can have the presence of these objects in the database.So the tables,searchhelps,structures,lockobjects comes under these ones.
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regards,
nagaraj
Message was edited by: nagaraj kumar nishtala

Partial Restoration of Tablespace from RAC instance to non-RAC instance

when i am trying to restore tablespace from RAC environment to Non-RAC i got below error in my log
channel aux1: starting datafile backup set restore
channel aux1: restoring control file
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MJ

I am not sure what you mean by "OS replication".
Whether you use RAC or a Failover Cluster, the database has to be on Shared Storage (which requires no "replication").
RAC licence costs are higher than that for a Failover Cluster because both instances have to licenced and the RAC option has to be purchased.
Of course, if the two nodes together are limited to 4 CPUs, you could consider Standard Edition to reduce the licencing costs.
DBA skills requirements are also higher for RAC.
With respect to your question "...will be sufficient for the avaialability purposes" it really depends on what your requirements are. People use RAC for Avaialability when it really is better positioned for Scalability. If you want only availability and can afford a few minutes downtime, and each node in the cluster can individually handle the user/batch loads, a Failover Cluster would suffice.
I suggest that you raise this question in the "Database - General" forum : General Database Discussions
or the "Real Application Clusters" forum : Real Application Clusters
"Replication" is the wrong forum for such a question.
When you do re-raise your question, please clarify your understinding of "OS replication".
Hemant K Chitale
Hemant K Chitale

Difference between a persistent messages and non persistent messages in JM

Hi
This question is with respect to persistent messages , and non persistent messages .
As per the docs it says that for persistent messages the QueueSender.send() blocks until it recivies an acknowledgement .
Here my question is what is the difference between a persistent messages , and non persistent messages
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The exact behaviour depends on the JMS provider being used. But since non-persistent messages are defined to be unreliable, the provider may indeed decide that it's not necessary for the server to acknowledge the receipt of a non-durable message from a producer.
Nigel

Business Objects and Oracle RAC

Post Author: mpg0033
CA Forum: Administration
Hello, we are brainstorming a 24x7 criystal reporting environment with no interruption for any maintenance operations. Does any one has knowledge of any implementation of BO with 3 node Oracle 10g RAC on Linux?

There are RAC customers around the world who currently use Business Objects against a RAC 10g database. Since BO is a reporting tool, most of the workload will be read. If you are using parallel query with 400 users, you may want to tune so that the parallel slaves stay within an instance. This should work fine across a RAC cluster.
Yes the interconnect traffic may be higher especially if you use inter - instance parallelism. Your post suggests that all your reports will go after the same data block....if that is the case, the data block will be cached in memory and will only get shipped across the interconnect once. This will not have a high impact on the interconnect.

Restore RAC database from non-RAC source - EBS R12.1.1

We have restored (PIT) a RAC database from a non-RAC (but ASM) source and I was wondering if that was a reasonable thing to do.
The reason I ask is that I seem to remember that in the upgrade to R12.1.1 the upgrade driver had a different list of jobs to do when the target was RAC vs when it was non-RAC... so is it possible the EBS R12.1.1 code is different for RAC (meaning we dont have the right code base in the DB since we restored a non-RAC source to a RAC destination)?
Disclaimer - I am NOT a DBA .. just trying to identify some potential problems we are troubleshooting.
Thanks in advance!
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OEL 5
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We have a RMAN back up of the non-RAC database that was restored and PIT recovered on the RAC database.Is it a full database backup?
The "code" base I am referring to is all the db stored objects for R12 EBS .. database compiled code.Restoring the RMAN backup on the target node is not enough. Have you run AutoConfig or postclone? Does your instance know that this is a a single instance and not a RAC one?
I am nervous that there may be alternate versions of the code to run in RAC vs non-RAC .. for instance I know that some of the ASCP jobs use DBMS PIPES and that can be tricky with RAC and Concurrent Manager.. And when we did the upgrade to R12, pointing it @ RAC generated more and different jobs than when it was not pointed @ RAC .. so SOMETHING was different according to the APPS ADPATCH/ADADMIN utilities.Please explain in details what is the purpose of doing this restore and what exactly you are trying to achieve. What cloning procedure you follow to refresh the target instance?
Thanks,
Hussein

Rac with Standby non-RAC

Hi hussein,
EBS R12.1
OEL 5.4
Is it possible that a EBS RAC setup will have a Standby (dataguard) which is non-rac?
Thanks a lot,
Ms K

Hi Mskl;
Please also check below note which could be helpful
Business Continuity for Oracle Applications Release 12 on Database Release 10gR2 - Single Instance and RAC [ID 452056.1]
Regard
Helios

SAN mirroring from RAC production to non-RAC DR

Hi Experts:
My client has a new project using 11gR2 and due to various reasons, they need to do the followings:
- Production Application #1 - 2 UNIX machines (likely AIX) running Oracle 11gR2 RAC, data residing on SAN
- Production Application #2 - 1 UNIX machine (AIX) running Oracle 11gR2 RAC, data residing on SAN
- DR site - Use 1 UNIX machine to host DBs (i.e. all non-RAC) for for both Applications #1 & #2.
Data are replicated from production to DR via SAN mirroring. (Clients decide not to use DataGuard for whatever reason).
I tried to find related info from Oracle website and Metalink with no luck.
Can anyone share there experiences on this , such as:
- Any restrictions or limitations ?
- Can we use only 1 Oracle binaries to host both DBs in DR site ?
- What about fallback from DR site back to the 2 production sites (1 RAC, 1 non-RAC) ?
Thanks and Regards
Airon

- Any restrictions or limitations ? Assuming you are using Same version & release. Of course you can have Different OS,
Here you can either have Normal FILE system, Lets suppose you have RAC on ASM even non-RAC(DR) you can have either on Normal file system (or) ASM file system.
Just take care of size of the mount point of where database resides & archives area size.
- Can we use only 1 Oracle binaries to host both DBs in DR site ?When standby is non-RAC, you have to use only one ORACLE_HOME, Here only Recovery will be in progress, No online threads will be active.
- What about fallback from DR site back to the 2 production sites (1 RAC, 1 non-RAC) ?What that mean? You mean switchover?
before switchover to a physical standby, all but one primary instances should be stopped; after switchover, started again.
http://docs.oracle.com/cd/E11882_01/server.112/e17022/rac_support.htm#i641732
Please describe more on it.
- For the production DB (application #1) with RAC, ASM will be used. So, what files from the 2 Unix servers / SAN must be replicated to DR?
- For the production DB (application #2) without RAC, ASM will not be used. So, what files from the 1 Unix server / SAN must be replicated DR ?I'm not sure for which application you are talking, All the database will be replicated to DR site either SAN or normal.
So you have to build standby database, Check below procedure to achieve this.
Here is document from MAA.
http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimarysingleinstance-131970.pdf
- In the setup of DR DB server, what type of Oracle installation (need full install of grid + DB software , or just DB software) is needed.In standby you can have just Oracle Home. But cluster_database will be FALSE.
Let us know if any questions.

Can we have separate 10gR2 RAC CRS and 11gR2 RAC CRS homes on same Unix s

We'd like to test the upgrade of our 10gR2 RAC databases to 11gR2 RAC.
We have six databases on the same server and want to install a separate 11g RAC stack (11g CRS, 11g ASM, 11g RDBMS) and upgrade each 10g database from 10g RAC stack on same server (10g CRS, 10g ASM, 10g RDBMS) . Is it ok to have 10g CRS home and 11g CRS home same server? If not, how best to upgrade without buying more hardware?
Thanks in advance,
Lou

In more detail, the main issue/question is whether there can be 2 Oracle CRS homes on the same server i.e. separate 10gR2 and 11gR2 CRS homes residing on the same server for the purposes of (gradually) upgrading all Oracle RDBMS homes from 10g RAC to 11g RAC.
Can there be? What would be the implications for the OCR and voting disk? In our case 10g CRS has OCR and Voting Disk on raw devices. In 11gR2, these would need to be migrated/upgraded/stored in ASM, right?
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- Install 11gR2 RDBMS home
- Upgrade one of the 6 10g databases while leaving the others untouched as 10g databases in the separate 10g CRS, 10g ASM stack?
Any ideas, pointers greatly appreciated.
Thanks,
Lou

What changed between 2.6.16 and 2.6.17?

I recently acquired a laptop and installed Arch without problems via the 0.7.2 CD. This installed the 2.6.16 kernel which runs fine on the system. However, upgrading to 2.6.17 results in system hang-ups at boot no matter what I try. It always locks up at the message "ACPI: PCI Host Bridge [(some garbage I can't remember)]"
I have the latest and greatest up-to-date Arch running fine on two desktops, but it doesn't agree with my lappy at all. Does anyone know what exactly changed between the two kernel versions that could cause this?
P.S. I've tried everything from a custom vanilla kernel, custom Arch kernel, custom Beyond kernel, enabling and disabling everything I could think of. I've tried countless GRUB arguments (nolapic, noapic, acpi=off, acpi=noirq, nosmp, pci=nommconfig, and a bunch of other that have been suggested to me) and I've tried several combinations of hooks and modules when running mkinitcpio. Damn frustrating, it is. :evil:

badger wrote:
One change with regards to ACPI and the kernel26 package was in the kernel config: changing the ACPI video component to be compiled as a module (I'm not saying this is the reason for the problem, just that this was a change). Original thread: http://bbs.archlinux.org/viewtopic.php?t=24376 and associated feature request http://bugs.archlinux.org/task/5281 I'm grateful the change was made.
cheers
Thanks for the lead. I'll check it out.

What is the difference between authorisation if-authenticated and none

Hello,
I am working on a AAA configuration, and can't determine the practical difference between authorisation none and authorisation if-authenticated.
I realise the obvious difference, that if TACACS is down, with none there is no authorisation if none is used; and if TACACS is down authorisation will allow all commands if if-authenticated is used.
However, since you must always be authenticated, before authorisation commences, in practical terms, there is no difference that I can see between if-authenticated and none? Can anyone please explain if there is a practical difference between them.
#####################Authorisation if-authenticated#############
aaa authorization exec default group tacacs+ if-authenticated
aaa authorization commands 1 default group tacacs+ if-authenticated
aaa authorization commands 15 default group tacacs+ if-authenticated
#####################Authorisation none##################
aaa authorization exec default group tacacs+ none
aaa authorization commands 1 default group tacacs+ none
aaa authorization commands 15 default group tacacs+ none
Many Thanks
Ian Potts

One use I can think of is where you have both AAA and local configured for exec or command authorization. Let's say TACACS+ in the following manner:
aaa new-model
aaa authentication login default tacacs+ local
aaa authorization exec default tacacs+ if-authenticated
username admin password
If you had this configuration without the "if-authenticated" statement and the connection to the TAC+ server goes down or you receive an ERROR in communicating with it such as a mismatched key, then it goes to local for authentication. If you did not want to use local authorization and want it to succeed exec authorization for this local account, then the "if-authenticated" statement would be needed.
Check out the debugs with:
aaa new-model
aaa authentication login default tacacs+ local
aaa authorization exec default tacacs+ local
AND the TAC+ server is down
6d21h: AAA/AUTHOR/EXEC (4150549846): Port='tty2' list='' service=EXEC
6d21h: AAA/AUTHOR/EXEC: (4150549846) user='admin'
6d21h: AAA/AUTHOR/EXEC: (4150549846) send AV service=shell
6d21h: AAA/AUTHOR/EXEC: (4150549846) send AV cmd*
6d21h: AAA/AUTHOR/EXEC (4150549846) found list "default"
6d21h: AAA/AUTHOR/EXEC: (4150549846) Method=TACACS+
6d21h: AAA/AUTHOR/TAC+: (4150549846): user=admin
6d21h: AAA/AUTHOR/TAC+: (4150549846): send AV service=shell
6d21h: AAA/AUTHOR/TAC+: (4150549846): send AV cmd*
core7200-4#
6d21h: AAA/AUTHOR (4150549846): Post authorization status = ERROR
6d21h: AAA/AUTHOR/EXEC: (4150549846) Method=NOT_SET
6d21h: AAA/AUTHOR/EXEC: (4150549846) no methods left to try
6d21h: AAA/AUTHOR (4150549846): Post authorization status = FAIL
6d21h: AAA/AUTHOR/EXEC: Authorization FAILED
NOTE, Post authorization fails because there is no method set for EXEC for the local user. Now, put in "if-authenticated" and test again:
aaa new-model
aaa authentication login default tacacs+ local
aaa authorization exec default tacacs+ if-authenticated
6d22h: AAA/AUTHOR/EXEC (2893174055): Port='tty2' list='' service=EXEC
6d22h: AAA/AUTHOR/EXEC: (2893174055) user='admin'
6d22h: AAA/AUTHOR/EXEC: (2893174055) send AV service=shell
6d22h: AAA/AUTHOR/EXEC: (2893174055) send AV cmd*
6d22h: AAA/AUTHOR/EXEC (2893174055) found list "default"
6d22h: AAA/AUTHOR/EXEC: (2893174055) Method=TACACS+
6d22h: AAA/AUTHOR/TAC+: (2893174055): user=admin
6d22h: AAA/AUTHOR/TAC+: (2893174055): send AV service=shell
6d22h: AAA/AUTHOR/TAC+: (2893174055): send AV cmd*
6d22h: AAA/AUTHOR (2893174055): Post authorization status = ERROR
6d22h: AAA/AUTHOR/EXEC: (2893174055) Method=IF_AUTHEN
6d22h: AAA/AUTHOR (2893174055): Post authorization status = PASS_ADD
6d22h: AAA/AUTHOR/EXEC: Authorization successful
Note, the Post authorization passes because of IF_AUTHEN.
See the behavior?
Hope this helps.

Example of Serialized objects and non-Serialized objects

Hi,
Can you please tell me some of eample of Serialized objects and nonserialized objects in java and j2ee.
Thanks
alex.

sravan123 wrote:
Serialised objects are File ,all Collection classes , subclasses of Throwable and subclasses of Number.
Non-Serialised objects are Connection,DataSourrce,Resultset , Thread and MathYou forgot to log in as another user before answering your own question incorrectly for reasons I'm currently unable to fathom

How to create a relationsship between a DB Bock and Non DB Block

Hi All,
I am working with oracle forms 10g.
I have created a Custom form. I have two block. One is a DB Block and another is control block(ie multi record blk).
I tried to create a master detail relationship between these two block.
Master block:LC_Master_BLK(DB Block).
Detail block: LC_Detail_blk(Non DB Block).
Form object navigator I click relation in Master Block and a pop up window opens and form there i select Detail block.
And i give the join condition like
LC_Master_BLK.PO_HEADER_ID=LC_Detail_blk.PO_HEADER_ID.
I have made po_header_id as primary key in my custom table,refred in my master block.
But it shows error as
FRM-15004: Error while parsing the join condtion.
Can any one tell me how to solve this.
Thanks & Regards
Srikkanth

Hi Srikkanth.M
I have two block. One is a DB Block and another is control block(ie multi record blk).this is what i call bad form design pls exchange the two blocks making ...
Master block:LC_Master_BLK(Non DB Block).
Detail block: LC_Detail_blk (DB Block).
Now to link the 2 blocks then define the join condition as follows:
:LC_Master_BLK.PO_HEADER_ID = :LC_Detail_blk.PO_HEADER_IDPls Keep in mind that the join condition specifies the relationship between items in 2 blocks db
or
one which is the master Non DB Block (to filter the display of data through user input to display the result output of data related in multi-records in the detail block.
That how u can works with the relation between two blocks as urs..
Hope this helps...
Regards,
Amatu Allah

Changes between a RAC(Objects) and NON RAC

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