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Hi Atul,
Could you please tell if i can configure Data gaurd set up on my machine alone(primary and stndby on single machine). I know Dataguard needs stndby DB at remote site, but for my learning purpose can i configure dataguard on same machine.
Thanks,
Anil
Yes Anil,
You can very well configure Dataguard on same machine for learning purpose but you need to take care of few things like db_file_convert (Exact syntax I’ll take up in a day or two) so that standby database can create file accourding to new mount point.
Atul
ReplyHi Atul ,
FYI ONLY : Why Oracle Apps 11i does not support Logical Standby database ?
Answer : BEcuase Oracle Apps 11i database lot of objects which are not supported by Logical standby database like functional indexes etc etc . Oracle has got plans to improve the logical standby concept in the new release as logical standby database can help in reporting env creation etc
Thanks
Vivek
ReplyVivek,
Thanks for sharing this with us all.
I think another big plus with logical standby is that rolling upgrade (Instance available to use for updtes while database upgarde) is supported in logical standby which I suppose will take few more years in physical standby .
Kevin for satndby important thing is software , you can install any type of database as long as software binaries match in primary & standby database .
Once you bring standby control file, datafile & initialization file from primary to standby , your primary data, initialization & control file will be overwritten ….
ReplyMight sound silly but i understand from ur post that data guards are of 2 types and its used for business continuity… but could you please explain what dataguard actually is?? may be by giving an example..
Thanks
ReplyAs mentioned above Dataguard is oracle standby database including two services redo log transport service & redo apply apply service used to keep standby siye in synch with primary site so that in case of any disaster to primary site you can open standby site and use it as primary.
Atul
ReplyHi Atul,
Can you please guide me to install dataguard on the same machine running on Windows 2000. I am getting error “ORA-01102: cannot mount database in EXCLUSIVE mode”
when i try to mount standby database.
Atul,
is there someway to setup Primary/Physical Standby without using DG/DGB?
Thanks a lot,
hank
ReplyHi Atul ,
Did you do this on Oracle apps Env. Am planing to setup DR plan using DG for Oracle apps.
Thank you
Sree
Hi
i have a primary and standby setup for oracle 11i apps using oracle note.
i have a few concerns :
1)if i am applying 5 patches which are related to each other i feel i must copy all the applications and data ( via redo transfer ) each time after each patch is applied.looks like a tedius task.
Can you highlight the disadvantages of Dataguard with 11i for DBA ?
For patching on apps with dataguard, apply patch on primary database part will come during sync now you have to sync standyby middle tier file system (for c and g portion)
Above is for apps patch.
For Database patch apply it on both primary and standby database.
For techstack patch – (iAS and Forms) I leave it to you to decide 😉
ReplyPatching:
Is it a true statement to say that midtier patching needs to executed on both prod and standby since effected changes cannot get to standby?
Yes this is true that midtier patching needs to executed on both prod and standby since effected changes cannot get to standby but if this is apps patch applied using adpatch you can’t run adpatch on standby as this require database to be open on standby site.
Hence workaround is synch file syatem on middle tier or apply patch on middle tier after failover/switchover
ReplyHi Atul
About patching APPS with dataguard. Can we take APPS off standby (by canceling recovery on standby and making log_archive_state_2=defer in primary). Finish patching on primary. Copy middle tier files to standby site and start standby… Please suggest.
ReplyCAN WE CONFIGURE ORACLE ENTERPRISES MANAGER IN LOGICAL AND PHYSICAL STANDBY DATABASES ON LINUX.
ReplyAtul : Can you please tell me , if we open the standy database in read/write mode . Any do some database changes like (DML operations ). can we regain the standby status . And also how do we take the changes made to the standy database to production database .
Reply