Server Administration :: Recover Database With Some Datafiles And Archivelogs?
Dec 24, 2010
We have lost some datafiles and some archivelogs. We have backup of whole database taken on Dec 20 and archivelogs until Dec 23.So we dont have 1 day worth of archivelogs which can lead to incomplete recovery.
Now question is do we need to restore all datafiles or only lost datafiles for incomplete recovery since we dont have all archivelogs ? lost datafiles belong to different tablespaces.
Datafiles which are still intact are with current SCN and we restore lost datafiles only and recover unitl our last available archivelog it will have different SCN. Will we be able to open database or we need to resotre whole database for this scenario?
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Jan 24, 2011
We have faced database(10.2.0) issue cause incomplete recovery and have performed open resetlogs. This DB is of 12Tb. In 10g opening database with reset logs do not invalidate previous backups. we have another replica(no reset state)of this database which we sync using archives.how we can apply those archives(reset database)to previous database?
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Jul 3, 2010
I have checked the space of my tablespaces/datafiles in my database. I have 8 GB space left in my database server. I cant add more hard-disk as there is no slot left. We r planning to buy a new server with latest config.
My question is, how can we know upto what size our database can increase and when a datafile need to be added in advance. Sometimes even though datafiles have space left,it shows errors abt extents cannot be extended. We have coalesce the tablespaces and added a new datafile.
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Oct 21, 2010
I create a test database which is duplicate of my production server and after every 15 or 20 days I need to synchronize test db with production db.So I clone it and it takes about a day.I have to remove all datafiles from test and move from production to there on test server and I applied restore and recover.So it is very time consuming process.
I want to know is there any process which makes my work less like I just need to apply all rest of the logs which are new after synchronize last time from production server that need restore and recover.
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Jul 12, 2010
Due to improper documentations of a certain project, I need to drop a DEFAULT tablespace of a newly created instance including it's associated datafiles by using this command:
"DROP TABLESPACE <tablespace name> INCLUDING CONTENTS AND DATAFILES;"
The default tablespace name is QWER (qwer01.dbf) and I added 2 datafiles in it, re: OPD_SML01.dbf & EXYT_SML01.dbf.
Do I have to do it online or offline?
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Dec 20, 2011
Can we add a datafile mapped to a shared network drive in windows server.
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Nov 25, 2010
Just noticed MR(media recovery lock ) in our database,further check showd all datafiles had this lock since our database was shutdown abortly but was startup gracefully.
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Nov 17, 2011
What is best practice to change small disk D:? I am beginner with Oracle. 10g on W2008. 5 datafiles (all indexes,second data file, 2 undotabs)*.dbf (34;30;1;34;12 GB) is on D:. Part of tablespaces (1 data, 1 undo)has files on c:.
I.
1.Shutdown 2008 server.
2.Copy D: image with GHOST to USB, network.
3.Connect new D, create RAID.
4.Restore image to D.
5.Start 2008 server.
II.
1.Stop application.
2.CONNECT AS SYSDBA
3.SHUTDOWN NORMAL or (IMMEDIATE)?
4.Copy files *.dbf at OS level from d: to ... USB disk, network.
5.Shutdown 2008 server.
6.Change disks, create RAID in BIOS.
7.Start W2008.
Is Oracle at this moment in SHUTDOWN mode?
8.Copy back *.dbf to new D: (with directory structure).
9.STARTUP Oracle.
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Feb 3, 2013
i encoutered lately on such statement:
Table D-7 shows a hierarchical file mapping of a sample OFA-compliant installation with two Oracle home directories and two databases. The database files are distributed across three mount points, /u02, /u03, and /u04. URL....
why three mount points (/u02, /u03, and /u04) for datafiles? don' understant this. isn't it better to store all datafiles in one mountpoint?
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Jul 1, 2013
I am facing an issue while rebuilding a DR (Physical Standby) site using RMAN.Rman is failing to restore all the datafiles to the stanby site.
There are 403 datafiles that should be restored among which after restoring 50-60 datafiles the channel is abruptly getting terminated.Please note this exercise is not new I have done this many times (once a year after a DR testing) and the same script is being used.The rcv file is as follows
/u03/oracle/admin/mpr/scripts/dataguard/configure_dr.rcv
connect auxiliary sys/XXXX@YYY
run {
duplicate target database for standby nofilenamecheck dorecover;
}
exit
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET;
configure_dr.rcv: END
[code]....
The trace file says "krso_proc_add: Detected dead process 13828326; subsuming V$MANAGED_STANDBY slot
INFO: krsr_rfs_atc: RFS processes are temporarily disallowed"
I have also started RMAN debug tracing and the trace is also scanned as it is huge.I have seen the following in the trace error 3015 signalled during compilation..I do not find any specific oracle error to check on .
The only change that happened is that the Primary production server has been moved to a new datacentre and after its move all the connections seems to be working fine.
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Feb 25, 2012
We have two tablespace xyz_ts & pqr_ts having 167 datafiles . We have to reduce this number of files. These tablespace having 580 GB size .
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Aug 6, 2010
would want to check which tables located in which datafiles.
Tried with this command:
select B.FILE_NAME from dba_segments a, dba_data_files b
where a.header_file=b.file_ID and segment_name='TABLE_NAME'
Seems like it only shows 1 datafile. Some tables are large and i suppose it's resided in more than 1 datafile.
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Jun 17, 2010
what's the difference between having BIG datafile (32GB) vs many small datafiles (4GB) replacing a Big one.
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May 25, 2010
I am looking for a script to find the tbs usage including datafiles. Tablespaces Datafile Size Used Free Used% Free% Max MB
Need all the data in MB and all the datafile space in every tablespace.I have searched internet,but couldn't find this type of format.
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May 9, 2013
Oracle database 11.2
What is the difference between
recover database until cancel using backup controlfile; and alter database recover automatic until cancel;
1. in user managed and server managed backups. What would be the location of the controlfile which is used in (recover database until cancel using backup controlfile;) .
2. why user first option and why use second option.
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Apr 26, 2011
We have separate tablespaces for Tables and Indexes. Also Temp is in different temporary tablespace and UNDO also in UNDO tablespace and Index tablespace contains only Indexes. The tablespace usage for tables is 80% and Index is 91%.There is not enough disk space to allocate for the datafile on our system. I ran a rebuild on one of the Index but now notice the Index tablespace is 98% used soon after the rebuild finished.
How can i free up space for Index tablespace and why does the size of Index tablespace increased after the rebuild.
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Dec 14, 2011
Question: does oracle recover past the scn mentioned in the control file or do you need recover using backup control file for it? No specific scn,time specified.
Scenario: Restore database on new server + copy archivelogs from original to minimize data loss.
Backup : 5 AM
Archivelogs: 7 AM
New server:
Configure dummy instance
Restore spfile from tape
Restore controlfile from tape: SCN 5AM
Restore database (no scn specified) from tape: : SCN 5AM
Copy archivelogs from old server to archivelog new location: SCN 7AM.
Recover database
open database -> SCN 5AM or 7AM?
Does it recover till SCN 5AM (controlfile) or SCN 7AM (latest scn in copied archivelog)
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Feb 12, 2013
OS: Solaris
DB: Oracle 11.2.0.1 EE
Not Using ASM or RAC
I have a Production database that is in archivelog mode and a Standby DR server. Both servers (Prod, Standby) have exact same structure and db name/version.
We manually scp archive logs and recover them to a manual standby database via SQL Scripts "cron". (I.E. set autorecovery on; recover standby database;)
We recently got out of sync with our log files and have not been applying them to the standby. As part of Prod Maintenance, these log files were deleted and are not available anymore.
I've tried several ways to "rebuild" our standby database. I have tried to Shutdown prod, backup all the db files and scp them to standby, re-create standby controlfile and startup mount and recover standby. Every time I try to apply a new archive log via recover standby, these are the errors:
ORA-00279: change 211077622 generated at 1/27/2012 12:18:42 needed for thread 1
ORA-00289: suggestion : /oradump/arch/PROD/PROD_arch_1_69486_736618850.arc
ORA-00280: change 211077622 for thread 1 is in sequence #69486
ORA-00308: cannot open archived log '/oradump/arch/PROD/PROD_arch_1_69486_736618850.arc'
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3
ORA-10879: error signaled in parallel recovery slave
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1: '/oradevices/PROD/oraPRODsystem1.dbf'
When I check v$log_history, the new logs have not been applied. I've also tried the "Restore from incremental backup via SCN" method with same results. Is there a way to re-create the standby clean and ensure that the log chain that is currently broken gets fixed or reset? I would eventually like to get DataGuard in here, but that's not the case at the moment.
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Oct 31, 2012
I read this article:
[URL]......
Does it work with copying datafiles from 10g2 to 11g2? I want to move one huge tablespace (which contains one table) from 10g2 to 11g2, what is the best method to do that?
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Jun 29, 2011
Can we restore a database if we have only the datafiles available? The database has been dropped but we have just the datafiles with NO system, sysaux,users and undo datafiles that were saved after taking the database offline and then dropping the database. I know this is strange but if possible, I want to see if we can retrieve some of the data from those datafiles to another database. BTW, There is no backup available for this database except the dbf files on OS.
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Jun 20, 2013
I'm testing out various RMAN restore/recovery scenarios for 10g R1. Took a full level-0 backup of one of our larger databases (16 tb) and I'm trying to restore the whole thing on another server. While the backup was running (for about a day & a half), a few datafiles were added. The backup completed fine, including "backup current controlfile;". Now my restore is failing with "RMAN-06023: no backup or copy of datafile xxxx found to restore", with reference to the 4 files that were added while the backup was in progress.
I guess if the datafiles were added after the backup had finished, we'd be fine because they'd be created during recovery with our archive logs (we have all of those).
I found some suggestions for first doing a "restore controlfile;" -- did that and it worked fine -- then mounting the database and creating the datafiles manually. I added that to my RMAN restore script and tried it, like so:
run {
allocate channel d4 type disk format '/BK01/dbX/stream1/df_%t_s%s_s%p' ;
sql "alter database create datafile ''/uXX/oradata/dbX/datafile_58.dbf''";
restore database ;
}
The datafiles were created successfully, and the restore began .. but then it failed with this:
creating datafile fno=4216 name=/uXX/oradata/dbX/datafile_58.dbf
...
RMAN-03002: failure of restore command at 06/20/2013 17:27:28
ORA-01119: error in creating database file '/uXX/oradata/dbX/datafile_58.dbf
ORA-27038: created file already exists
So RMAN seems to be telling me that if these 4 datafiles don't exist in the backupset, then RMAN won't automatically create them. But if I manually create them first, then RMAN will try to restore them and complain that they already exist. And for that matter, I would have expected that RMAN would be smart enough to detect that those 4 files were added while the backup was active, and just include them in the backup. Maybe there's something I needed to do to tell RMAN to do that?
This is just a test, so of course I can redo the backup from scratch and try again, but we have some pretty large databases which cannot be shut down for cold backups, so it's entirely possible this scenario could show up in a real disaster recovery. RMAN does such a good job of managing things.
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Oct 26, 2010
How to distribute the datafiles among various disks of a server, so that I/O operations are improved.
I mean is there any area we need to focus while distributing the disk like:
1)Particular types of datafiles should be placed in one disk.
2)Temp/Undo/Rollback tablespaces in another disk.
3)Indexes in another disk
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Jul 13, 2010
While trying to copy a database, i used the command: RECOVER DATABASE USING BACKUP CONTROLFILE until cancel; it gave:
ORA-00279: change 7866782806751 generated at 07/12/2010 19:39:23 needed for thread 1
ORA-00289: suggestion : /moteurs/oracle/r11110/R11110/archivelog/2010_07_13/o1_mf_1_1158_%u_.arc
ORA-00280: change 7866782806751 for thread 1 is in sequence #1158
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
CANCEL
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/data01/oracle/r11110/data/SYSTEM01.dbf'
ORA-01112: media recovery not started what can i do in this case of issue?
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Mar 25, 2011
i took the backup database with dump file.. today morning database is crashed but i have only yesterdays backup dump file. How can i recover the full database?
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Nov 8, 2010
I had a problem starting up my database but was able to get it up and running. The only difference in my two scenarios was that I added a "recover database" statement, which seemed to do the trick.
I was under the impression during startup Oracle implicity does a recover if needed. If that is the case, how come I needed to use the "recover database" step. why the first scenario did not work and the second did.
STARTUP DID NOT WORK
================
Total System Global Area 3775086592 bytes
Fixed Size 2159192 bytes
Variable Size 1694502312 bytes
Database Buffers 2013265920 bytes
Redo Buffers 65159168 bytes
Database mounted.
SQL> alter database open;
alter database open
[code]...
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Dec 7, 2007
I have an oracle 8i recovery scenario. I have database cold backups of MONDAY and WEDNESDAY evenings. backup contains control files, data files, redo files
Database runs in Archive log mode and all archives of the month are available. Hard disk crashed on SATURDAY
all archive logs are still available at different location. Control files are not backed up to trace or file name or automatically means no backup control file (except ones in cold backups described above)
restoring all files from cold backup of either MONDAY or WEDNESDAY (I recovered to Wednesday) leaves nothing to recover. Querying V$RECOVER_FILE returns nothing. All log sequences higher to the number nnn displayed as result of ARCHIVE LOG LIST are present at correct location in correct format
My question is how do i ROLL Forward the Database from WEDNESDAY to SATURDAY in the above scenario.
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Apr 2, 2013
i have one question regarding archivelog and backup if i take just backup excluding archivelogs like = RMAN>backup database; (not plus archivelog ) now when even i recover database using backup , will it also recover changes that was in archives?
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Oct 15, 2013
I have the following situation: a customer sent me a group of files, that he said to be a "backup" of an old database, that is no longer online (he doesn´t use our software anymore). However, he needs to recover the data in this database. The person at the company who generate these files doesn´t work there anymore, so we don´t have any of the following information:
- Database version, connection details, service names, user names neither tablespace names.
We were just told that these files were recorded in a DVD, and is que only source remaining.
The files he sent are the following:
ctrlcf_satp_01.ctl
ctrlcf_satp_02.ctl
ctrlcf_satp_03.ctl
daddf_satp_dad_01.dbf
[code]......
Is there a way to access this data? Or can I tell our costumer that your data is lost forever..
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Feb 10, 2011
Currently my DB is running on 10g Archivelog mode. All the archive logs being generated at /u04/dbarch/.The server crashed yesterday. Now when I want to start my instance it throwing the error ORA-01110 and ORA-01113-- system01.dbf need more recovery.The below are the command I fired from sql prompt:-
SQL>STARTUP MOUNT;
SQL>RECOVER DATABASE UNTIL CANCEL;
But still oracle suggesting that system01.dbf need more recovery.
how can I recover my database.
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Jan 30, 2013
i have the following problem:
At a test database instance of Oracle 11g (11.2.0.3.0) at CentOS 6 i've imported a tablespace from another instance to test my backup strategy.
First i've done a fullbackup with RMAN:
----------
# rman target /
RMAN> BACKUP DATABASE PLUS ARCHIVELOG DELETE INPUT;
----------
Then i thought to test the database i could delete something and restore and recover the database from the backup. So i deleted a table in the imported tablespace:
----------
# sqlplus / as sysdba
SQL> drop table TESTTABLE;
----------
After that i would start the restore and recover process by restoring and recovering the tablespace in which I deleted the table with RMAN. At first i've set the tablespace offline:
----------
SQL> alter tablespace TESTTABLESPACE offline immediate;
----------
Then I go to RMAN and start the restoring:
----------
RMAN> restore tablespace TESTTABLESPACE;
----------
Now there is a problem when i execute the recover command. The recover command includes the recovering from the redolog files, right? As I dropped the table from the tablespace this operation was written in the redolog files. So when i make a :
----------
RMAN> recover tablespace TESTTABLESPACE;
----------
The dropped tablespace would be dropped also, because the last redolog file told RMAN to drop the table. So i think I have to restore and recover my tablespace from an older timestamp, so RMAN would ignore the dropping of the table in the redolog file. Is that right so?
And when it is right how can i restore a tablespace from an older date so RMAN would ignore the dropping?
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