Restoring Full backup for Duplication

Hello,
I am duplicating my production database to Test environment. We have FULL sunday backup and daily increamental. I am restoring from Tape backup till Monday. Production DB size is 350 GB
Usually it takes more than 2 days. Is there any way to improve performance of Restoration?
Regards,
Sandeep

I am checking the bug/notes.
For backup I am using - allocate channel t1 type sbt PARMS="BLKSIZE=1048576" maxpiecesize 32G maxopenfiles 64;
and for Restore script -
allocate auxiliary channel t1 type 'sbt_tape' send 'NB_ORA_POLICY=ora_zus26d-0701_uh_00_sesz_cl02,NB_ORA_CLIENT=zus26d-0701-bkp.csintra.net,NB_ORA_SERV=bkphg7en1.csintra.net,NB_ORA_SCHED=ora_zus26d-0701_uh_00_sesz_cl02_user';
allocate auxiliary channel t2 type 'sbt_tape' send 'NB_ORA_POLICY=ora_zus26d-0701_uh_00_sesz_cl02,NB_ORA_CLIENT=zus26d-0701-bkp.csintra.net,NB_ORA_SERV=bkphg7en1.csintra.net,NB_ORA_SCHED=ora_zus26d-0701_uh_00_sesz_cl02_user';
Can this affect restore performance?

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Brian,
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That said, tape has the advantage that you can offsite it and archive it very cheaply, and the media are fairly cheap, so you can make lots of backups, so if one fails, you probably can restore the data from another tape.
Disks are more expensive initially, but end up being pretty reliable, and you get a lot more flexibility (plus, they're fast).
An emerging "best of both worlds" backup strategy is what's called disk to disk to tape, where you typically back up to another large "disk," for example a second Xserve RAID. Data is then backed up from the second disk to tape, which is taken offsite... thus tape is used for what it's best at (offsite archival). Restore can be from disk in most cases, which is 10-20x faster than restoring from tape. People use software packages like Netvault's Bakbone or Atempo's Time Navigator, which can handle the whole process, and it works quite well. The backup disks (e.g. the RAID) can be onsite, or can be at a backup site a couple KM away, attached via optical (this is preferable, for DR reasons).
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Is it possible to restore database from a full backup without controlfile?

Hi,
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run{
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Is there a way to restore the control file from the backup files?

Thanks Werner!
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2010-03-19 18:41 <DIR> .
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2010-03-19 18:39 104,857,600 F_ORCL_02L8VSJ0_2_2_714076768
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2010-03-19 18:40 104,857,600 F_ORCL_02L8VSJ0_2_7_714076768
2010-03-19 18:40 104,857,600 F_ORCL_02L8VSJ0_2_8_714076768
2010-03-19 18:40 104,857,600 F_ORCL_02L8VSJ0_2_9_714076768
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See.
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Hello,
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rman_df_lv1c COMPLETED 20/Jul/2011 21H00m WEST 04:47:36 DB INCR SBT_TAPE *3.37T* 524.36G 31.12M
rman_df_lv1c COMPLETED 19/Jul/2011 21H00m WEST 04:06:09 DB INCR SBT_TAPE *3.15T* 490.75G 34.03M
rman_df_lv1c COMPLETED 18/Jul/2011 21H00m WEST 03:40:24 DB INCR SBT_TAPE *2.49T* 410.88G 31.82M
rman_df_lv0 FAILED 16/Jul/2011 22H16m WEST DB INCR SBT_TAPE 6.27T 5.69T
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rman_df_lv1c FAILED 13/Jul/2011 21H01m WEST 04:40:45 DB INCR SBT_TAPE 3.25T 542.98G 33.01M
rman_df_lv1c COMPLETED 12/Jul/2011 21H00m WEST 07:15:54 DB INCR SBT_TAPE 4.74T 847.93G 33.20M
rman_df_lv1c COMPLETED 11/Jul/2011 21H00m WEST 07:26:40 DB INCR SBT_TAPE 3.78T 766.40G 29.28M
rman_df_lv0 FAILED 9/Jul/2011 02H32m WEST 04:30:44 DB INCR SBT_TAPE 749.89G 716.02G 45.14M
rman_df_lv1c FAILED 7/Jul/2011 21H01m WEST 04:49:24 DB INCR SBT_TAPE 2.16T 515.90G 30.42M
rman_df_lv1c FAILED 6/Jul/2011 21H00m WEST 01:26:06 DB INCR SBT_TAPE 745.83G 165.48G 32.80M
rman_df_lv1c FAILED 5/Jul/2011 21H01m WEST 00:05:48 DB INCR SBT_TAPE 58.56G 7.56G 22.24M
rman_df_lv1c FAILED 4/Jul/2011 21H00m WEST 01:55:03 DB INCR SBT_TAPE 422.40G 79.55G 11.80M
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>
If I need a full rman restore which backups will it use? Will it be the last level 0 backup with the last level 1 cumulative?
From http://download.oracle.com/docs/cd/B28359_01/backup.111/b28270/rcmvalid.htm
Validating Backups Before Restoring Them
You can run RESTORE ... VALIDATE to test whether RMAN can restore a specific file or set of files from a backup. RMAN chooses which backups to use.
The database must be mounted or open for this command. You do not have to take datafiles offline when validating the restore of datafiles, because validation of backups of the datafiles only reads the backups and does not affect the production datafiles.
When validating files on disk or tape, RMAN reads all blocks in the backup piece or image copy. RMAN also validates offsite backups. The validation is identical to a real restore operation except that RMAN does not write output files.
You can monitor what RESTORE VALIDATE does.
Make precautions, so you do not damage the production DB!!!
Iordan Iotzov
http://iiotzov.wordpress.com/

Restoring Full backup for Duplication

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