What are the ways tablespaces can be managed and how do they
differ?
- 2 Answers
- 5629 Views
- IBM, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / ram
tablespaces can be managed in 2 ways 1) Dictionary Managed
2) Locally managed
in DMT data dictionary tables stores the information of free and used extents, for used extents information in dmt tablespace uses sys.uet$ view and free extents information in DMT tablespace stored in sys.fet$
in LMT tablespace, tablespace datafiles maintains own bitmaps @ datafile headers these store the used extents and free extents information.
LMT is preferable, because it won't generate any rollbacks,
dictionary contention is reduced, space wastage removed & fragmentation removed
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / kittu
tablespaces can be managed in 2 ways 1) Dictionary Managed
2) Locally managed
In dictionary managed tablespace oracle will take care of tablespace
In locally managed tablespace we need to take care of tablespace
| Is This Answer Correct ? | 1 Yes | 3 No |
What are the different ways you can create databases in sql server? : sql server DBA
now one user in online.now i want drop him..how do u drop him?
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?
how will u see whether the dabase is in archive log mode or not?
What are the steps you will take, if you are tasked with securing an SQL Server?
What are the operating modes in which database mirroring runs? : sql server DBA
what are the differences of where and if in SAS?
hi, suppose i created one table after few days i did some insert,update how can i know when will i did ddl or dml operation is undergone on that table
Which types of backups you can take in Oracle? 2. A database is running in NOARCHIVELOG mode then which type of backups you can take? 3. Can you take partial backups if the Database is running in NOARCHIVELOG mode?
what is the difference between off-line back up and on-line back up in ibm db2 udb?
What the different components in replication and what is their use? : sql server DBA
SUPPOSE AS A DBA YOU CREATED ONE USER BY DEFAULT HOW MANY PRIVILIZES WILL COME TO USER & WHERE CAN YOU SEE THAT PRIVILIZES.
-
Oracle (3239) - SQL Server (4518)
- MS Access (429)
- MySQL (1402)
- Postgre (483)
- Sybase (267)
- DB Architecture (141)
- DB Administration (291)
- DB Development (113)
- SQL PLSQL (3312)
- MongoDB (502)
- IBM Informix (50)
- Neo4j (82)
- InfluxDB (0)
- Apache CouchDB (44)
- Firebird (5)
- Database Management (1391)
- Databases AllOther (288)
