7. Where should you place Archive logfiles, in the same
disk where DB is or another disk?
8. Can you take online backup of a Control file if yes, how?
9. What is a Logical Backup?
10. Should you take the backup of Logfiles if the database
is running in ARCHIVELOG mode?
11. Why do you take tablespaces in Backup mode?
12. What is the advantage of RMAN utility?
13. How RMAN improves backup time?
14. Can you take Offline backups using RMAN?
15. How do you see information about backups in RMAN? 21.
Where RMAN keeps information of backups if you are using
RMAN without Catalog?
22. You have taken a manual backup of a datafile using o/s.
How RMAN will know about it?
23. You want to retain only last 3 backups of datafiles.
How do you go for it in RMAN?
24. Which is more efficient Incremental Backups using RMAN
or Incremental Export?
25. Can you start and shutdown DB using RMAN?
26. How do you recover from the loss of datafile if the DB
is running in NOARCHIVELOG mode?
27. You loss one datafile and it does not contain important
objects. The important objects are there in other datafiles
which are intact. How do you proceed in this situation?
28. You lost some datafiles and you don't have any full
backup and the database was running in NOARCHIVELOG mode.
What you can do now?
29. How do you recover from the loss of datafile if the DB
is running in ARCHIVELOG mode?
30. You loss one datafile and DB is running in ARCHIVELOG
mode. You have full database backup of 1 week old and
partial backup of this datafile which is just 1 day old.
From which backup should you restore this file?
31. You loss controlfile how do you recover from this?
32. The current logfile gets damaged. What you can do now?
33. What is a Complete Recovery?
34. What is Cancel Based, Time based and Change Based
Recovery?
35. Some user has accidentally dropped one table and you
realize this after two days. Can you recover this table if
the DB is running in ARCHIVELOG mode?
36. Do you have to restore Datafiles manually from backups
if you are doing recovery using RMAN?
37. A database is running in ARCHIVELOG mode since last one
month. A datafile is added to the database last week. Many
objects are created in this datafile. After one week this
datafile gets damaged before you can take any backup. Now
can you recover this datafile when you don't have any
backups?
38. How do you recover from the loss of a controlfile if
you have backup of controlfile?
39. Only some blocks are damaged in a datafile. Can you
just recover these blocks if you are using RMAN?
40. Some datafiles were there on a secondary disk and that
disk has become damaged and it will take some days to get a
new disk. How will you recover from this situation?
41. Have you faced any emergency situation. Tell us how you
resolved it?
42. At one time you lost parameter file accidentally and
you don't have any backup. How you will recreate a new
parameter file with the parameters set to previous values.
16. What is a Recovery Catalog?
17. Should you place Recovery Catalog in the Same DB?
18. Can you use RMAN without Recovery catalog?
19. Can you take Image Backups using RMAN?
20. Can you use Backupsets created by RMAN with any other
utility?
- 1 Answers
- 12504 Views
- IBM, I also Faced
- E-Mail Answers
Answer / star nirav
7. Keep Archives in separate mount points / Disks are the
preferred solution, so incase of any curruption / media
corruption, you may recover your DB from that location.
8. backup controlfile to '<location>' or trace (check with
the latest file in trace directory)
9. Export is a logical backup.
10. Not mendatory.
11. If RMAN is not implemented or only one tablespace needs
to backup (because, it may contain the dynamic data), you
need to go for 'alter tablespace <tbs_name> begin backup';
12. Oh man, i'm tired to post that... check google yaar...
13. RMAN will not take backup of free blocks and will have
multiple channels so it would be fastest than any other
old / traditional ways.
14. Yes... we can take backup offline with RMAN. (Thats why
I love RMAN)
15. see the command help in RMAN... its damn easy mate.
Dont expect spoon-feeding all d time :)
16. Catalog is an inventory of the backup taken by RMAN for
the said database.
17. Well, depends upon resources. there is no harm to place
catalog into the same DB.
18. Yes, very much... it will use control file to store the
required information.
19. Not sure on image part. (may be question need to
rephrase. :)
20. well... depends upon the utility / tool... But probably
NO.. Because, RMAN uses different algorithm to decode /
encode the backups.
21. Control files.
22. Not sure
23. you need to configure retention period in RMAN.
24. Obviously RMAN incremental backup...
25. Yes.
26. you can recover from cold backup only but it wouldnt be
consistent... i.e. you need to restore complete cold backup
27. Simply, recreate the new datafile... :D
28. Well, you can recreate that but data would be lost. (I
pressume that, Datafile is NON-SYSTEM)
29. Ohh... from recover from .... and apply for the
archives.
30. No matter here... You have archives, you can select any
good backup to recover from.
31. Create the control file again... and place it to the
location (where spfile is pointing to).
32. Create new one and drop the currupted one.
33. I doubt... you are appearing for DBA interview... ???
34. Oh my poor boy... Pl. read documentation before
applying for any interviews.
35. If its 10g and flashback is configured then you can
recover immediately from recycle bin... if its 9i then you
may need to check log miner and do point-in time recovery..
36. Nope.
37. Couldnt understand question... Pl. re-post if you want.
38. Sweetheart... read documentation (RMAN part)
39. Yes
40. Depends upon the nature of those datafiles. if its non-
system and non-critical, you can put them on offline mode.
Else, you need to contact me on +91 974 212 7827... :)
41. Every day in morning, I face the emergency in my
bathroom... (Dont ask me now which kind of emergency) hee
hee hee... LOL :P
42. From Alertlog file...
Last but not least... Above answers are very generic for
the common problems. If you still need any assistance, Pl.
drop an email / call (details are in my signature below). I
provide the consultancy also... :)
Thanks
Star Nirav
Enterprise Architect - Database
Capgemini, Bangalore
+91 974 212 STAR (7827)
Nirav.Khanderia@gmail.com
| Is This Answer Correct ? | 14 Yes | 2 No |
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