What utility is used to create a physical backup?

1 Answer

Answer :

Either rman or alter tablespace begin backup will do..

Related questions

Description : How does one backup a database using the export utility? (for DBA

Last Answer : Oracle exports are "logical" database backups (not physical) as they extract data and logical definitions from the database into a file. Other backup strategies normally back-up the physical data ... exports include more information about the database in the export file than user level exports.

Description : What command would you use to create a backup control file?

Last Answer : Alter database backup control file to trace.

Description : Why and when should I backup my database? (for DBA

Last Answer : Backup and recovery is one of the most important aspects of a DBAs job. If you lose your company's data, you could very well lose your job. Hardware and software can always be ... things that will get you. Most failed recoveries are a result of organizational errors and miscommunications.

Description : You have just had to restore from backup and do not have any control files. How would you go about bringing up this database?

Last Answer : I would create a text based backup control file, stipulating where on disk all the data files where and then issue the recover command with the using backup control file clause.

Description : Explain the difference between a hot backup and a cold backup and the benefits associated with each.

Last Answer : A hot backup is basically taking a backup of the database while it is still up and running and it must be in archive log mode. A cold backup is taking a backup of the database while it is ... and thus there will be a slight performance gain as the database is not cutting archive logs to disk.

Description : Can Full Backup be performed when the database is open ?

Last Answer : No.

Description : What is cold backup? What are the elements of it?

Last Answer : Cold backup is taking backup of all physical files after normal shutdown of database. We need to take. - All Data files. - All Control files. - All on-line redo log files. - The init.ora file (Optional)

Description : What is a logical backup?

Last Answer : Logical backup involves reading a set of database records and writing them into a file. Export utility is used for taking backup and Import utility is used to recover from backup.

Description : What is hot backup and how it can be taken?

Last Answer : Taking backup of archive log files when database is open. For this the ARCHIVELOG mode should be enabled. The following files need to be backed up. All data files. All Archive log, redo log files. All control files.

Description : My database was terminated while in BACKUP MODE, do I need to recover? (for DBA

Last Answer : If a database was terminated while one of its tablespaces was in BACKUP MODE (ALTER TABLESPACE xyz BEGIN BACKUP;), it will tell you that media recovery is required when you try to restart the ... : ALTER DATABASE END BACKUP; The above commands need to be issued when the database is mounted.

Description : Does Oracle write to data files in begin/hot backup mode? (for DBA

Last Answer : Oracle will stop updating file headers, but will continue to write data to the database files even if a tablespace is in backup mode.In backup mode, Oracle will write out complete changed blocks ... ). Because of this, one should notice increased log activity and archiving during on-line backups.

Description : How does one backup archived log files? (for DBA

Last Answer : One can backup archived log files using RMAN or any operating system backup utility. Remember to delete files after backing them up to prevent the archive log directory from filling up. If the ... oracle/arch_backup/log_t%t_s%s_p%p' 5> (archivelog all delete input); 6> release channel dev1; 7> }

Description : How does one backup a database using RMAN? (for DBA

Last Answer : The biggest advantage of RMAN is that it only backup used space in the database. Rman doesn't put tablespaces in backup mode, saving on redo generation overhead. RMAN will re-read database ... directly to tape. Alternatively one can backup to disk and then manually copy the backups to tape.

Description : What is Full Backup ?

Last Answer : A full backup is an operating system backup of all data files, on-line redo log files and control file that constitute ORACLE database and the parameter

Description : What is Partial Backup ?

Last Answer : A Partial Backup is any operating system backup short of a full backup, taken while the database is open or shut down.

Description : What is cold backup and hot backup (in case of Oracle)?

Last Answer : ∙ Cold Backup: It is copying the three sets of files (database files, redo logs, and control file) when the instance is shut down. This is a straight file copy, usually from the disk ... was done. The database is restored to the most consistent state without any loss of committed transactions.

Description : Name two utilities that Oracle provides, which are use for backup and recovery.

Last Answer : Along with the RDBMS software, Oracle provides two utilities that you can use to back up and restore the database. These utilities are Export and Import. The Export utility dumps the definitions and data ... best you can do is recover the database to the time when the export was last performed.

Description : Is it possible to backup your database without the use of an RMAN database to store the catalog?

Last Answer : Yes, but the catalog would be stored in the controlfile.

Description : What is COMPRESS and CONSISTENT setting in EXPORT utility?

Last Answer : COMPRESS Simply: COMPRESS=n - Allocated space in database for imported table will be exactly as the space required to hold the data. COMPRESS=y - The INITIAL extent of the table would be ... . To minimize this possibility, export those tables at a time when updates are not being done.

Description : What is the best backup utility to use with Windows XP?

Last Answer : I use Acronis True Image. . . easy to use.

Description : What's the best free file system backup utility?

Last Answer : Are you looking for fully bootable images or more of a weekly file backup type of thing?

Description : Utility programs include (a) Virus scanning software (b) Backup software -Technology

Last Answer : (d) Utility programs includes virus scanning, backup, disk defragmenter software.

Description : ____ software creates a mirror image of the entire hard disk, including the operating system, applications, files and data. a) Operating system b) Backup software c) Utility programs d) Driver imaging e) None of these

Last Answer : b) Backup software

Description : ________ is a windows utility program that locates and eliminates unncessary fragments and rearranges filed and unused disk space to optimize operations a) Backup b) Disk cleanup c) Disk defragmenter d) Restore e) None of these

Last Answer : c) Disk defragmenter

Description : The DBMS utility, ...................... allows to reconstruct the correct state of database from the backup and history of transactions. A) Backup B) Recovery C) Monitoring D) Data loading

Last Answer : B) Recovery

Description : A ……………… allows to make copies of the database periodically to help in the cases of crashes & disasters. A) Recovery utility B) Backup Utility C) Monitoring utility

Last Answer : B) Backup Utility

Description : How does one create a standby database? (for DBA)

Last Answer : While your production database is running, take an (image copy) backup and restore it on duplicate hardware. Note that an export will not work!!! On your standby database, issue ... the standby database, stop the recovery process and activate it: ALTER DATABASE ACTIVATE STANDBY DATABASE;

Description : Name a tablespace automatically created when you create a database.

Last Answer : The SYSTEM tablespace.

Description : A table is classified as a parent table and you want to drop and re-create it. How would you do this without affecting the children tables?

Last Answer : Disable the foreign key constraint to the parent, drop the table, re- create the table, enable the foreign key constraint.

Description : Which parameter specified in the DEFAULT STORAGE clause of CREATE TABLESPACE cannot be altered after creating the tablespace?

Last Answer : All the default storage parameters defined for the tablespace can be changed using the ALTER TABLESPACE command. When objects are created their INITIAL and MINEXTENS values cannot be changed.

Description : How does one create and drop database users?

Last Answer : Look at these examples: CREATE USER scott IDENTIFIED BY tiger -- Assign password DEFAULT TABLESACE tools -- Assign space for table and index segments TEMPORARY TABLESPACE temp; -- Assign sort space ... give the user some space quota on its tablespaces: ALTER USER scott QUOTA UNLIMITED ON tools;

Description : The following describes means to create a OEM V1.x (very old!!!) repository on WindowsNT:

Last Answer : Create a tablespace that would hold the repository data. A size between 200- 250 MB would be ideal. Let us call it Dummy_Space. . Create an Oracle user who would own this repository. Assign ... would trigger the creation of the repository. From now on, Enterprise manager is ready to accept jobs.

Description : How does one create a repository? (for DBA

Last Answer : For OEM v2 and above, start the Oracle Enterprise Manager Configuration Assistant (emca on Unix) to create and configure the management server and repository. Remember to setup a backup for the repository database after creating it.

Description : What are the built-in routines is available in forms 4.0 to create and manipulate a parameter list?

Last Answer : Add_parameter Create_Parameter_list Delete_parameter Destroy_parameter_list Get_parameter_attr Get_parameter_list set_parameter_attr

Description : Can we create two blocks with the same name in form 3.0 ?

Last Answer : No

Description : How will you create multiple rollback segments in a database ?

Last Answer : Create a database which implicitly creates a SYSTEM Rollback Segment in a SYSTEM tablespace. Create a Second Rollback Segment name R0 in the SYSTEM tablespace. Make new rollback segment ... ) for rollback segments. Deactivate Rollback Segment R0 and activate the newly created rollback segments.

Description : How does one create a RMAN recovery catalog? (for DBA

Last Answer : Start by creating a database schema (usually called rman). Assign an appropriate tablespace to it and grant it the recovery_catalog_owner role. Look at this example: sqlplus sys SQL>create user ... . Look at this example: rman catalog rman/rman target backdba/backdba RMAN> register database;

Description : Why is it preferable to create a fewer no. of queries in the data model?

Last Answer : Because for each query, report has to open a separate cursor and has to rebind, execute and fetch data.

Description : How does one create a password file? (for DBA

Last Answer : The Oracle Password File ($ORACLE_HOME/dbs/orapw or orapwSID) stores passwords for users with administrative privileges. One needs to create a password files before remote administrators (like OEM) will be ... visible in the process table of many systems. Administrators needs to be aware of this!

Description : How do you create a new session while open a new form?

Last Answer : Using open_form built-in setting the session option Ex. Open_form('Stocks ',active,session). when invoke the mulitiple forms with open form and call_form in the same application, state whether the following are true/False

Description : How does one create a new database? (for DBA)

Last Answer : One can create and modify Oracle databases using the Oracle "dbca" (Database Configuration Assistant) utility. The dbca utility is located in the $ORACLE_HOME/bin directory. The Oracle Universal ... ='/u02/oradata/'; ALTER SYSTEM SET DB_CREATE_ONLINE_LOG_DEST_2='/u03/oradata/'; CREATE DATABASE;

Description : A Column is having many repeated values which type of index you should create on this column, if you have to?

Last Answer : For example, assume there is a motor vehicle database with numerous low-cardinality columns such as car_color, car_make, car_model, and car_year. Each column contains less than 100 distinct values by themselves, and a b tree index would be fairly useless in a database of 20 million vehicles.

Description : A table is having few rows, should you create indexes on this table

Last Answer : Small tables do not require indexes; if a query is taking too long, then the table might have grown from small to large. You can create an index on any column; however, if the ... , creating an index on the column does not increase performance and the index takes up resources unnecessarily.

Description : On which columns you should create Indexes?

Last Answer : In general, you should create an index on a column in any of the following situations: ▪ The column is queried frequently ▪ A referential integrity constraint exists on the column ▪ A UNIQUE key ... ORDER BY clauses ▪ On columns that have few of the same values or unique values in the table

Description : Which default Database roles are created when you create a Database?

Last Answer : CONNECT , RESOURCE and DBA are three default roles. The DBA_ROLES data dictionary view can be used to list all roles of a database and the authentication used for each role. The following query lists all the roles in ... ------------ -------- CONNECT NO RESOURCE NO DBA NO SECURITY_ADMIN YES

Description : What is the minimum number of instances you need to have in order to create a RAC?

Last Answer : 1. You can create a RAC with just one server.

Description : Physical Storage of the Data

Last Answer : The finest level of granularity of the data base are the data blocks. Data Block :: One Data Block correspond to specific number of physical database space Extent :: Extent is the number of ... Index has index segment that stores data c) Roll Back Segment :: Temporarily store 'undo' information

Description : To display the page no. for each page on a report what would be the source & logical page no. or & of physical page no.?

Last Answer : & physical page no.

Description : What is a physical page ? & What is a logical page ?

Last Answer : A physical page is a size of a page. That is output by the printer. The logical page is the size of one page of the actual report as seen in the Previewer.

Description : What are the components of physical database structure of Oracle database?

Last Answer : Oracle database is comprised of three types of files. One or more datafiles, two are more redo log files, and one or more control files.