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testing RAC [message #455996] Fri, 14 May 2010 00:35 Go to next message
malhi
Messages: 96
Registered: December 2009
Location: Karachi
Member
We are testing RAC implemented by a vendor on oracle 11gr1. I observe following, kindly tell me whether it should be like this

1. I update a column of a table on one node and terminate the session without commiting. I checked it was applied. (My understanding is that when we close s session without commit, it rollback )
2. Same happens in insert case.

3. I issue a time consuming update/Insert , and before it ends it close session. (Nothing was applied)

Can you please help, what should i do for further testing.

We are using
Oracle Enterprise Linux 5.4
DRBD 0.8.3 (Dual Primary Mode)
OCFS2 1.4.4
Oracle Clusterware 11.1
Oracle RDBMS 11gr1
Re: testing RAC [message #456008 is a reply to message #455996] Fri, 14 May 2010 01:09 Go to previous messageGo to next message
Michel Cadot
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Quote:
what should i do for further testing.

What is the purpose of your tests?
If it is to verify that Oracle satisfies the transactional rules, it is just a waste of time, Oracle guarantees it.

Regards
Michel
Re: testing RAC [message #456018 is a reply to message #456008] Fri, 14 May 2010 02:03 Go to previous messageGo to next message
malhi
Messages: 96
Registered: December 2009
Location: Karachi
Member
Our purpose is check, weather deployment is correct or some thing remain.......
Re: testing RAC [message #456025 is a reply to message #456018] Fri, 14 May 2010 02:49 Go to previous messageGo to next message
Michel Cadot
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Quote:
weather deployment is correct

Against which criteria?

Regards
Michel
Re: testing RAC [message #456050 is a reply to message #456025] Fri, 14 May 2010 05:13 Go to previous messageGo to next message
malhi
Messages: 96
Registered: December 2009
Location: Karachi
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what is your opinion about three points, regarding which i enquire.

If you can tell me what should be the criteria of testing.
Re: testing RAC [message #456084 is a reply to message #455996] Fri, 14 May 2010 08:57 Go to previous messageGo to next message
denissun
Messages: 3
Registered: July 2009
Junior Member
1,2 maybe depend on your client. With SQL* Plus, if you type "exit" to terminate, Oracle issues "commit"; if you close the terminal window using your mouse, It roll back.
( Sorry I have no TOAD or OEM or any other GUI tool with me, and did not get time to test them).

For 3, I believe no matter what, it should roll back.

This test has nothing to do with RAC Smile

Hope this help.
Re: testing RAC [message #456873 is a reply to message #456084] Wed, 19 May 2010 22:56 Go to previous messageGo to next message
raghunandanas
Messages: 1
Registered: December 2009
Location: bangalore
Junior Member
there is concept of autocommit. It is possible to configure session to commit automatically on exit
Re: testing RAC [message #456875 is a reply to message #456873] Wed, 19 May 2010 23:25 Go to previous messageGo to next message
Michel Cadot
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Oracle does not know autocommit but client can implement it if it wants.
This means that if client is killed or aborts then transaction is rolled back.

Regards
Michel
Re: testing RAC [message #456946 is a reply to message #456875] Thu, 20 May 2010 07:20 Go to previous messageGo to next message
malhi
Messages: 96
Registered: December 2009
Location: Karachi
Member
When i login as "sqlplus / as sysdba"
then whatever i update or insert and kill session, without commit it behave exactly what i mentioned at 1 & 2.

But when i login as "sqlplus taq/pwd@node" and do some update or insert and kill session, without commit it rollback.

In both cases autocommit was off. I could not understand this difference.
Re: testing RAC [message #456957 is a reply to message #456946] Thu, 20 May 2010 07:51 Go to previous message
Michel Cadot
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- Never ever use SYS (or SYSDBA) but for maintenance purpose (startup, shutdown, backup, recover)
- SYS/SYSDBA is special
- SYS/SYSDBA is Oracle proprietary (try to open a SR/TAR starting with "i did that with SYS/SYSDBA" and you'll see the immediate answer)
- SYS/SYSDBA does not act like any other user
- When you use SYS/SYSDBA Oracle deactivates some code path and activates others
- Whatever you do with SYS/SYSDBA will neither validate nor invalidate the same thing with any other user.

NEVER EVER use SYS/SYSDBA for anything that can be done by another user.
Use SYS/SYSDBA ONLY for something that can't be done by someone else.

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