How to estimate recovery time from rman backup

how to estimate recovery time from rman backup?
The database is of size 800GB.
the approximate time to backup is 8- 10 hours.

"Recovery time" is : RESTORE DATABASE time + RECOVER DATABASE time.
RESTORE can be done
a. in parallel with multiple channels if your backup was created as multiple backupsets
b. using incremental backups
c. whether the backups are on
i. disk
ii. tape
Alternatively, if you have a Recovery Area with an Incrementally Update backup of the database, you can SWITCH DATABASE almost immediately
RECOVER depends on
a. how many archivelogs (in terms of size, not necessarily number) need to be applied
-- this depends on
i. transaction volume
ii. the "freshness" of the backups (how recent the backups are)
b. whether required archivelogs are available on disk (which can be the case if the database backup itself is a very recent backup and archivelogs since then haven't been deleted {whether they have been backed up or not}) OR whether they need to be restored from
i. disk backup
ii. tape backup

Similar Messages

Undo tablespace recovery from RMAN backup

Hi,
Lets's assume we have RMAN backup and archivelog backups, and now
my undo tablespace's disk crashed ,how can i recover?
Can i recover while database is up?
Thanks,
Kumar.

to recover UNDO tablespace from RMAN backup you must shutdown the database and start it in the MOUNT state to recover the missing files as follows
rman target /
RUN
STARTUP MOUNT;
ALLOCATE CHANNEL ch3 TYPE Disk;
RESTORE datafile 'c:\u01\prod3\undo01.dbf';
RECOVER datafile 'c:\u01\prod3\undo01.dbf';
ALTER DATABASE OPEN;
RELEASE CHANNEL ch3;
hope this will help you

How do I retrieve files from a backup hard drive (was backed up using Time Machine) on a different computer

how do I retrieve files from a backup hard drive (was backed up using Time Machine) on a different computer?

Please visit Pondini's Time Machine FAQ for help with all things Time Machine.

How to save SOME time machine Mac backups from the TM disk to other disk WITHOUT formatting the destination disk?

Hi,
How to save SOME time machine Mac backups from the TM disk to other disk WITHOUT formatting the destination disk?
I have a Time Machine disk (A) including the backups of several different Macs (B, C, D & E) generated with an old Mac OS X 10.5.8 (iMac PowerPC) over the years.
I have transferred the old Mac contents to a new Mac with OS X 10.8.3 using Migration Assitant. All OK.
Now, I want to erase such TM disk A to use if for other purposes, but first, I would like to RECOVER the backups of some Macs inside it (D and E). Is that possible WITHOUT formatting the destination disk and selecting only some Macs from the TM disk and not the fulll TM disk? How?
Thanks.

Thanks for the reply. I do not think that is messy, anway. I simply used the same external disk as Time Machine disk for different Macs. And that worked OK all the time for years.
The ExternalTimeMachineDisk contains the folder Backups.backupdb
which contains the following folders (each one corresponding to the Time Machine backup made from each Mac):
Mac1
Mac2
MacBook1
MacBook2
In relation to my message above, is it possible to select specific files, folders or full Mac backups from such Time Machine disk and save them to other disk? How?
Thanks.

Can not recover table from rman backup

For testing I want to recover deleted table from rman backup.
I have make vm of oracle 11g. the following step i have applied but could not recover the table.
rman> backup database ;
On sqlplus create login as scott/tiger
create table scott.emp1(col1 varchar2(10));
insert into emp1(col1) value('Yasir ') ;
commit ;
select * from emp1 ;
it shows me one row successfully.
Now i have login the sys as sysdba
sqlplus> alter system switch logfile ;
after this i have drop the table .
Now to recover the table i have restored database on same vm.
rman>restore database ;
rman> recover database ;
rman> alter database open ;
on sqlplus i have issued
sqlplus> select * from scott.emp1 ;
table or view does not exist.
any help how to recover the deleted table from rman backup

Hi,
Check this test case
SQL> create table TEST2 as select * from emp;
Table created.
SQL> select count(*) from TEST2;
COUNT(*)
15
SQL> select TO_CHAR(SYSDATE,'DD-MON-YYYY HH24:MI:SS') from dual;
TO_CHAR(SYSDATE,'DD-
10-SEP-2013 10:57:05
SQL> alter system switch logfile;
System altered.
SQL> drop table TEST2 purge;
Table dropped.
SQL> shu immediate
[oracle@vnode MYSHELL]$ rman target /
Recovery Manager: Release 11.2.0.2.0 - Production on Tue Sep 10 10:58:39 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: DDTEST (DBID=1667776968, not open)
RMAN> run{
set until time "to_date('2013 Sep 10 10:57','yyyy mon dd hh24:mi')";
restore database;
recover database;
alter database open resetlogs;
}2> 3> 4> 5> 6>
media recovery complete, elapsed time: 00:00:02
Finished recover at 10-SEP-13
database opened
RMAN> exit
SQL> set lin 200 pages 100
SQL> select count(*) from test2;
COUNT(*)
15
HTH

Restore spfile from rman backup ---- error.

Hi,
I am trying to execute recovery on new machine ...
I have done the following steps..
I have one database as ora10g2 as peroduction database on one machine as hosta
I have created a catalog on another machine cora10g2 (hostb)
I have taken a full backup from hosta as per following ...
the following command execute from hosta machine.
$ rman target sys/<passwd>@ora10g2 catalog rman/rman@cora10g2 ...
Backup completed ...
Now I am trying to restore this backup on hostb machine where i have already rman catlog database ..
I have done the following setting ...on host b
set oracle_sid=DUP
and execute following command ...
rman target / catalog rman/rman@cora10g2
RMAN> set dbid 2760732370
executing command: SET DBID
database name is "BAAN10G2" and DBID is 2760732370
RMAN>
RMAN>
RMAN> startup force nomount ;
startup failed: ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/oracle/dbs/baan10g2/dbs/initbaan10g2.ora'
starting Oracle instance without parameter file for retrival of spfile
Oracle instance started
Total System Global Area 159383552 bytes
Fixed Size 1977112 bytes
Variable Size 67114216 bytes
Database Buffers 83886080 bytes
Redo Buffers 6406144 bytes
RMAN>
RMAN>
RMAN>
RMAN> show all ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/rman/backup/control/cntrl_%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 4 BACKUP TYPE TO BACKUPSET;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/baanora3/rman/ora10g2/bkup_db_%d_s%s_P%p_t%t' MAXPIECESIZE 1024;
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
RMAN>
RMAN>
RMAN> list backup of spfile ;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
2420 Full 7.33M DISK 00:00:01 14-JUN-07
BP Key: 2426 Status: AVAILABLE Compressed: NO Tag: TAG20070614T182935
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070614-00
SPFILE Included: Modification time: 14-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2509 Full 7.33M DISK 00:00:01 15-JUN-07
BP Key: 2515 Status: AVAILABLE Compressed: NO Tag: TAG20070615T130416
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-00
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2694 Full 7.33M DISK 00:00:01 15-JUN-07
BP Key: 2739 Status: AVAILABLE Compressed: NO Tag: TAG20070615T131703
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-01
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2760 Full 80.00K DISK 00:00:01 15-JUN-07
BP Key: 2763 Status: AVAILABLE Compressed: NO Tag: TAG20070615T163437
Piece Name: /rman/spfile/spfile.ora
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2769 Full 7.33M DISK 00:00:02 15-JUN-07
BP Key: 2771 Status: AVAILABLE Compressed: NO Tag: TAG20070615T163441
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-02
SPFILE Included: Modification time: 15-JUN-07
RMAN>
RMAN>
RMAN> restore spfile from autobackup ;
Starting restore at 19-JUN-07
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=36 devtype=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: sid=35 devtype=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: sid=34 devtype=DISK
allocated channel: ORA_DISK_4
channel ORA_DISK_4: sid=33 devtype=DISK
channel ORA_DISK_1: looking for autobackup on day: 20070619
channel ORA_DISK_1: looking for autobackup on day: 20070618
channel ORA_DISK_1: looking for autobackup on day: 20070617
channel ORA_DISK_1: looking for autobackup on day: 20070616
channel ORA_DISK_1: looking for autobackup on day: 20070615
channel ORA_DISK_1: looking for autobackup on day: 20070614
channel ORA_DISK_1: looking for autobackup on day: 20070613
channel ORA_DISK_1: no autobackup in 7 days found
channel ORA_DISK_2: looking for autobackup on day: 20070619
channel ORA_DISK_2: looking for autobackup on day: 20070618
channel ORA_DISK_2: looking for autobackup on day: 20070617
channel ORA_DISK_2: looking for autobackup on day: 20070616
channel ORA_DISK_2: looking for autobackup on day: 20070615
channel ORA_DISK_2: looking for autobackup on day: 20070614
channel ORA_DISK_2: looking for autobackup on day: 20070613
channel ORA_DISK_2: no autobackup in 7 days found
channel ORA_DISK_3: looking for autobackup on day: 20070619
channel ORA_DISK_3: looking for autobackup on day: 20070618
channel ORA_DISK_3: looking for autobackup on day: 20070617
channel ORA_DISK_3: looking for autobackup on day: 20070616
channel ORA_DISK_3: looking for autobackup on day: 20070615
channel ORA_DISK_3: looking for autobackup on day: 20070614
channel ORA_DISK_3: looking for autobackup on day: 20070613
channel ORA_DISK_3: no autobackup in 7 days found
channel ORA_DISK_4: looking for autobackup on day: 20070619
channel ORA_DISK_4: looking for autobackup on day: 20070618
channel ORA_DISK_4: looking for autobackup on day: 20070617
channel ORA_DISK_4: looking for autobackup on day: 20070616
channel ORA_DISK_4: looking for autobackup on day: 20070615
channel ORA_DISK_4: looking for autobackup on day: 20070614
channel ORA_DISK_4: looking for autobackup on day: 20070613
channel ORA_DISK_4: no autobackup in 7 days found
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 06/19/2007 18:00:13
RMAN-06172: no autobackup found or specified handle is not a valid copy or piece
RMAN>
I am not able to restore spfile from rman backup ;;;

Hi,
I would like to know few things
1. How are you setting the db_name ? you can set db_id at RMAN, how are you setting the db_name ?
2. Do you have any default init file at default location ? if yes, is the db_name parameter set correctly in that file ?
Since spfile is yet to be restored, you must set the db_name parameter correctly before you start spfile restore.This can be done with init file at default location which can even contain just one paremeter i.e db_name.

Completeness of Prerequisites for Recovering Tables for PDBs from RMAN Backups

Could you verify the completeness of following prerequisities on pag. 441 of the "Backup and Recovery User's Guide 12c Release 1 (12.1) E17630-14"
Prerequisites for Recovering Tables and Table Partitions from RMAN Backups
■ The target database must be in read-write mode.
■ The target database must be in ARCHIVELOG mode.
■ You must have RMAN backups of the tables or table partitions as they existed at the point in time to which you want recover these objects.
■ To recover single table partitions, the COMPATIBLE initialization parameter for target database must be set to 11.1.0 or higher.
According to my test Database administrator workshop: How to recover a table in a pluggable database from a backup
those prerequisities are valid for CDBs or non-CBDs, but if you want to recover tables or table partitions in PDBs a different prerequisite is needed.
Indeed if you have a backup of only the pluggable database including the missing table (the third prerequisite above), but you don't have any backup of the container database the command...
recover table ... of pluggable database ... until scn ... auxiliary destination ...
will fail with the following errors:
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 02/12/2014 12:22:18
RMAN-03015: error occurred in stored script Memory Script
RMAN-06026: some targets not found - aborting restore
RMAN-06023: no backup or copy of datafile 3 found to restore
RMAN-06023: no backup or copy of datafile 4 found to restore
RMAN-06023: no backup or copy of datafile 1 found to restore
So to recover table in PDBs you must have also the RMAN backups of the CDB or in the opposite way it's not sufficient to have only the backups of the pluggable database, because during the creation of the auxiliary database the SYS, SYSAUX and the UNDO tablespace are required.
Regards,
MarcoV

Hi,
Before dropping a DB we had taken an RMAN backup.I hope you were in mount mode.
Will RMAN automatically recognize the FORMAT of the backup piece and restore ?No it won't.
First you have to restore a controlfile in nomount mode with:
restore controlfile from '/u04/backup/rmanbkp /02mo9fnc_1_1';
and do alter database mount.
Than you have to run "catalog start with '/u04/backup/rmanbkp'; " so the instance now knows where to find the pieces.
Now you can run a restore database command.
Than open the database with resetlogs.
Regards,
Tycho

Setting up new dbname/sid while creating oracle db from rman backups in 11g

Hi all,
I have rman backups and need to create another database from rman backups with different name... but it is unsuccessful..
created instance with new db...
running create new db connecting rman auxiliary sys/password@newdb
run {
SET NEWNAME FOR DATAFILE 1 TO 'F:\app\HOME\oradata\clonedb1\SYSTEM01.DBF';
SET NEWNAME FOR DATAFILE 2 TO 'F:\app\HOME\oradata\clonedb1\SYSAUX01.DBF';
SET NEWNAME FOR DATAFILE 3 TO 'F:\app\HOME\oradata\clonedb1\UNDOTBS01.DBF';
SET NEWNAME FOR DATAFILE 4 TO 'F:\app\HOME\oradata\clonedb1\USERS01.DBF';
SET NEWNAME FOR DATAFILE 5 TO 'F:\app\HOME\oradata\clonedb1\EXAMPLE01.DBF';
SET NEWNAME FOR TEMPFILE 1 TO 'F:\app\HOME\oradata\clonedb1\TEMP01.DBF';
DUPLICATE DATABASE TO clonedb
pfile 'D:\TESTDELETE\initclonedb1.ora'
BACKUP LOCATION 'F:\app\HOME\flash_recovery_area\orcl\'
LOGFILE GROUP 1 ('F:\APP\HOME\ORADATA\ORCL\REDO01.LOG') SIZE 60M REUSE,
GROUP 2 ('F:\APP\HOME\ORADATA\ORCL\REDO02.LOG.rdo') SIZE 60M REUSE,
GROUP 3 ('F:\APP\HOME\ORADATA\ORCL\REDO03.LOG') SIZE 60M REUSE;
Error it shown is in rman backup creation is as follows
<part>>
sql statement: alter system set db_name = ''ORCL'' comment= ''Modified by RMAN
duplicate'' scope=spfile
Oracle instance shut down
Oracle instance started
Total System Global Area 640286720 bytes
Fixed Size 1376492 bytes
Variable Size 314576660 bytes
Database Buffers 318767104 bytes
Redo Buffers 5566464 bytes
Starting restore at 20-DEC-11
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=133 device type=DISK
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:07
output file name=F:\APP\HOME\ORADATA\CLONEDB1\CONTROL01.CTL
output file name=F:\APP\HOME\FLASH_RECOVERY_AREA\CLONEDB1\CONTROL02.CTL
Finished restore at 20-DEC-11
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 12/20/2011 07:07:11
RMAN-03015: error occurred in stored script Memory Script
RMAN-06136: ORACLE error from auxiliary database: ORA-01102: cannot mount databa
se in EXCLUSIVE mode
RMAN> EXIT
how can i prevent rman setting db_name=orcl which is already exists in the db.. i need to create db from rman backups with different dbname...
whould someone help me out, how can i create database from another database rman backups with different dbname/sid on same host..
My pfile has new db_name , but while db creation rman setting to db_name to source dbname.. it should be new db name that i want create with new db name...
is there any RMAN command to specify new DB name it should set while running
sql statement: alter system set db_name = newdbname -- as part rman script execution...
it appears to be i should not touch the soruce db.. i have access to only source db rman backups and need to create another db with different dbname/sid.. please do help...

When you performing RMAN duplicate why you making your script so complicated?
Your instance name and DB name can be different, But what is the contents in your pfile "D:\TESTDELETE\initclonedb1.ora" ? please do post
Have you started any other services related to ORACLE? check in start --> run --> services.msc any other active oracles services, Make sure you have clonedb1.
Startup in nomount
check the connectivity to target server.
SET NEWNAME FOR TEMPFILE 1 TO 'F:\app\HOME\oradata\clonedb1\TEMP01.DBF';Why you mentioning SET NEWNAME FOR DATAFILE ? You have option of db_file_name_convert/log_file_name_convert in case if your file system different in Target & auxiliary.
BACKUP LOCATION 'F:\app\HOME\flash_recovery_area\orcl\'When you have backup in same location why you are mentioning this clause?
First run duplicate from auxiliary server as
rman target sys/*****@prod auxiliary /
RMAN> duplicate target database to "db_name";
Am not sure what you are trying to do. is it 11gR1 or 11gR2?
You have option of duplicate from active database without having backup also..
here some links please check it.
http://docs.oracle.com/cd/E14072_01/backup.112/e10642/rcmdupdb.htm#BGBFDJHB
RMAN 11GR2 : DUPLICATE WITHOUT CONNECTING TO TARGET DATABASE [ID 874352.1]
knowledgespring
     Newbie
Handle:      knowledgespring
Status Level:      Newbie (10)
Registered:      Dec 26, 2007
Total Posts:      243
Total Questions:      77 (75 unresolved)
So sad that forum was able to help only in two answers out of your 77 questions :(
Edited by: CKPT on Dec 21, 2011 5:12 PM

How to find size of each RMAN backup

friends,
How to find size of each RMAN backup? Everyday we r taking rman hotbackup and need to find size of each day backup? Is there any dba views ?
Thanks in advance

Or start rman target / rcvcat rman/rman@catalogdb
and use the command:
RMAN> list backup;
Output should look like:
BS Key Type LV Size Device Type Elapsed Time Completion Time
8152318 Full *38.72G* SBT_TAPE 02:05:35 20-APR-09
BP Key: 8152322 Status: AVAILABLE Compressed: NO Tag: FULL_BK_DB
Handle: df_WCSPRD_t684630039_s1757_p1 Media:
List of Datafiles in backup set 8152318
File LV Type Ckp SCN Ckp Time Name
1 Full 4657366129868 19-APR-09 /opt/test/db01/system01.dbf
2 Full 4657366129868 19-APR-09 /opt/test/db01/undotbs01.dbf
3 Full 4657366129868 19-APR-09 /opt/test/db01/sysaux01.dbf
4 Full 4657366129868 19-APR-09 /opt/test/db01/users01.dbf
5 Full 4657366129868 19-APR-09 /opt/test/db01/testc01.dbf
6 Full 4657366129868 19-APR-09 /opt/test/db01/test01.dbf
7 Full 4657366129868 19-APR-09 /opt/test/db01/testc02.dbf
See bold text for backup piece size

How do I use time machine to backup to an external hard drive plugged into my airport extreme

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I don't know if all of that makes sense, but if someone knows how to do that, please help me, I can't afford to lose those hundreds of contacts.

Download a free copy of ibackupbot for your computer and try it. If you think it is what you want you have to pay $30

How,can,i,recovery,photos,from,phone,5,with,,broken,screen,,in,recovery,mode,and ,has,password

How can i recovery photos from phone 5 with broken screen inrecovery mode and has,password

Hi Tsorbie,
I am sorry to tell you that you cannot recover photos once your iPhone is on recovery mode.
Regards,
J_Kim

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how do I keep time from showin on calandar events ?

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How can I extract photos from my backup (5000+ photos) for free?

How can I extract photos from my backup (5000+ photos) for free?

eyal123 wrote:
How can I extract photos from my backup (5000+ photos) for free?
You cannot.
Why are you opposed to paying for some software to help do what you want?
You can restore the backup to your iPhone then sync the photos to your computer.

How to get a time from a NTP server in ActionScript 3 ?

Dear All,
I need your advice, how to get the time from NTP Server , I tried to do this, but I don't.
Thanks
Omar Mahmoud

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How to estimate recovery time from rman backup

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