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For more information, see "Taking Tablespaces Offline". For example, assume that a database is open and an offline tablespace must be recovered, but not enough space is available to mount the necessary redo log files at the location These changes are recorded so that: Oracle can identify the datafiles and redo log files to open during database startup Oracle can identify files that are required or available in case However, you will receive a warning in ALERT.LOG saying that a default temporary tablespace is recommended and will be necessary in future releases.

For example, enter: STARTUP After the database is open, take all tablespaces that contain damaged datafiles offline. Otherwise, the recovery will try to update the headers of the read-only files. Operating systems impose limits on the number and size of data files. Until such time that vendors supply their own libraries, there will be only one entry in the filemap.ora file, and that is the Oracle-supplied EMC library.

It contains the following topics: Components of File Mapping Mapping Structures Example of Mapping Structures Configuration ID Components of File Mapping The following figure shows the components of the file mapping You can change the value of DB_FILES (by changing the initialization parameter setting), but the new value does not take effect until you shut down and restart the instance. For example: ALTER TABLESPACE users OFFLINE NORMAL; Rename the data files using the operating system. never any other time quote: Can I not get last backup information?

I tried to change the pfile value and then recreated spfile and again facing the same problem Thanks 89215Views Tags: none (add) This content has been marked as final. In RAID5, the number of contiguous units also include the parity stripes. A binary backup is only useful really to create a textual "create controlfile" statment after the fact. 2) weekly would be NO DIFF then daily -- just more archives to apply Unless table striping is used (where data is spread across more than one disk), the database administrator and end users cannot control which datafile stores a schema object.

For example, issue the following at the SQL prompt to recover the whole database: RECOVER DATABASE If you shut down all instances cleanly, and did not restore any backups, issuing RECOVER Through these mapping libraries information about individual I/O stack elements is communicated. Like Show 0 Likes(0) Actions 10. so I will stick with Oracle 8i documentation for these databases at least.

For example, when several databases have a copy of the file you want to transfer, you can consider factors such as source availability, source load, and communication bandwidth to the destination For example, this view cannot tell whether a datafile contains corrupt data blocks.Optionally, queryV$RECOVER_FILEto list datafiles requiring recovery by datafile number with their status and error information. Both files X and Y reside on a file system mounted on volume A. In a warm start scenario where the mapping information is already built, you have the option to invoke the DBMS_STORAGE_MAP.MAP_SAVE procedure to save the mapping information in the data dictionary. (Note

Elements may be mirrors, stripes, partitions, RAID5, concatenated elements, and disks. You cannot drop data files in a read-only tablespace that was migrated from dictionary managed to locally managed. Moving data by transporting tablespaces can be orders of magnitude faster than either export/import or unload/load of the same data, because transporting a tablespace involves only copying datafiles and integrating the Figure 5-1 Creating a New Database Incarnation Text description of the illustration performa.gif.

An example of the ALTER DATABASE RECOVER AUTOMATIC LOGFILE statement follows: SQL> ALTER DATABASE RECOVER TABLESPACE users; ORA-00279: Change #### generated at DD/MM/YY HH:MM:SS needed for thread # ORA-00289: Suggestion : For example, enter % cp /oracle/dbs/* /oracle/backup Note: At this point you must not reopen the database. Temporary Datafiles Locally managed temporary tablespaces have temporary datafiles (tempfiles), which are similar to ordinary datafiles, with the following exceptions: Tempfiles are always set to NOLOGGING mode. Oracle Database allows more data files in the database than the operating system defined limit.

Like regular tablespaces, attributes of undo tablespaces can be modified with the ALTER TABLESPACE statement and dropped with the DROP TABLESPACE statement. You execute the DBMS_STORAGE_MAP.MAP_ALL procedure to build the mapping information for the entire I/O subsystem associated with the database. MANUAL This keyword tells Oracle that you want to use free lists for managing free space within segments. For example, you may see something similar to the following: ORA-00308: cannot open archived log "/oracle/work/arc_dest/arcr_1_811.arc" ORA-27037: unable to obtain file status SVR4 Error: 2: No such file or directory Additional

Otherwise, it will not start successfully. See Also: Your Oracle operating system-specific documentation for information about the amount of space required for the file header of datafiles on your operating system Datafile Contents When a datafile is Hi Mudit,What is the status of this file v$datafile_header :SELECT FILE#, STATUS, ERROR, RECOVER, TABLESPACE_NAME, NAME FROM V$DATAFILE_HEADERWHERE NAME LIKE '&your_datafile';- Vikram November 14, 2008 at 10:34 AM Post a Comment Read only and offline files get the compatibility advanced after they are made read/write or are brought online.

Oracle Database allows more datafiles in the database than the operating system defined limit. This causes the DBWn process and the direct loader to calculate a checksum for each block and to store the checksum in the block header when writing the block to disk. V$MAP_FILE_IO_STACK The hierarchical arrangement of storage containers for the file displayed as a series of rows. You almost did lose it here.

You can specify automatic file extension by specifying an AUTOEXTEND ON clause when you create data files using the following SQL statements: CREATE DATABASE ALTER DATABASE CREATE TABLESPACE ALTER TABLESPACE You This backup was required since it was impossible to perform recovery using a backup taken before using RESETLOGS--especially if any errors occurred after resetting the logs. In general, backups made before a RESETLOGS operation are not allowed in the new incarnation. There are several reasons why, after starting recovery, you may want to restart.

The filemap.ora file is created by the database when your system is installed. I have 2 Database servers s1 and s2. For example, enter: SELECT name FROM v$datafile; Ensure that all datafiles of the database are online. That is just an utter and total waste.

But I backup archivelogs and control files regularly. This avoids the need for a potentially expensive complete rebuild of the mapping information on every instance startup. All of these mapping structures are illustrated in the following example. The value of MAXSIZE is the maximum size to which the file can automatically extend.

Reviews Write a Review Thanks November 24, 2002 - 10:04 pm UTC Reviewer: Blue from Bangladesh Good suggestion and tips , Dear Tom. Error publishing Mobile Field Service application Oct 2008 CPU unstable release for Apps 11i Changes to default functionality in 11g database Upgrade Oracle 9iAS release 1( to AS 10g... The table includes a brief description of the statement, as used to create data files, and references the section of this book where use of the statement is specifically described: SQL If there is no such problem, you must restore the file or switch to a copy.If theERRORcolumn isNULLand theRECOVERcolumn isYES, then the file requires media recovery (and may also require a

ALTER TABLESPACE users RENAME DATAFILE '/u02/oracle/rbdb1/users01.dbf', '/u02/oracle/rbdb1/users02.dbf' TO '/u03/oracle/rbdb1/users01.dbf', '/u04/oracle/rbdb1/users02.dbf'; Back up the database. Copying a File on a Local File System This section includes an example that uses the COPY_FILE procedure in the DBMS_FILE_TRANSFER package to copy a file on a local file system. You want to rename or relocate a data file. Only restore and drop operations are allowed in such a configuration.

In below example I set the value for DB_FILES to 9. For example, if you are using SQL*Plus, it returns the following lines and prompts: ORA-00279: Change #### generated at DD/MM/YY HH:MM:SS needed for thread# ORA-00289: Suggestion : logfile ORA-00280: Change #### answer: only when you are in NO archive log mode. SQL> startup ORACLE instance started.

Note: If the SYSAUX tablespace is unavailable, such as due to a media failure, then some database features might fail. A restored or re-created control file does not contain the information needed to updateV$RECOVER_FILEaccurately.To find datafile and tablespace names, you can also perform useful joins using the datafile number andtheV$DATAFILEandV$TABLESPACEviews. Followup December 10, 2008 - 9:53 am UTC please utilize support.