Find Whether Backup Taken Consistent Or Not
Mar 22, 2011
i am given a database to recover. The person who gave me the database says that he has taken a full hot backup of the database on 19th march and i was also given the archives of the incremental backups until 21march now how can i check if the backup he has taken is consistent or not? after unzipping the available archivelogfiles on and after 19th(THE DATE on which full backup was taken) i tried to open the database using
>startup mount
>recover database using backup controlfile until cancel;
here i got an error and i found out that the archive log files after 13 march are missing.i queried select * from v$log and found that the last log was on 13 March. is this the correct way to say that, since this returned 13 MARCH the database is taken full backup on 13 March itself?
but the person who has taken full backup is saying that he has taken the full backup on 19th march.
how can i confirm whether the full backup taken on 19th was not consistent concretely? are there any other ways to find whether a backup taken is consistent or not i am not using RMAN backup i want to know the procedure when i have to do it manually
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Feb 15, 2011
Actually, i have test database open in read only and i want to apply archive files carry from production database at daily level.
When i'm going for recovery, since database is already in consistent state, it is not asking for recovery.
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Jun 22, 2010
In oracle 10g data pump (Logical backup) How to take the consistent backup. What parameter can we use?
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May 16, 2012
I am trying to open the database bur gettinf following errors
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: 'C:ORACLEPRODUCT10.2.0ORADATAORCLSYSTEM01.DBF'
SQL> shutdown
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 289406976 bytes
[code]....
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Jun 27, 2011
How can I reduce the consistent gets of the sql:
select b.OFFER_ID,
b.OFFER_CODE,
b.OFFER_NAME,
b.OFFER_COMMENTS,
b.BAND_ID,
b.CAN_BE_BUY_ALONE,
b.PRICING_PLAN_ID,
b.PRIORITY,
b.STATE,
[code]...
I have already added the indexes for the outer sql to reduce the cost from 374 to 150. But the the consistent gets seems not reduce that much. I notice that the function will cost 6 consistents gets per execution. It seems it not very high. But if this function goes with the sql, it will cost a very high consistent gets, if I remove this function, the sql only cost 1903 consistents gets.
So what I am thinking there should be two ways to reduce the consistent gets..The first one is reduce the recursive call of the sql. The second is reduce the consistent gets of the function. (but it seems that the consistent gets in this function is very low, only 6.)
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Jan 14, 2013
My DBA restored a table (which is already exists in the DB) so how can I found that current table is restored one?
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Jun 9, 2012
how to find the corruption block and judge whether it is physical corruption or logical corruption?
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Feb 9, 2013
is there any way to find is rman backup sets are encrypted or not.
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Sep 16, 2012
After running the following command:
RUN{
SET NEWNAME FOR DATAFILE 1 TO 'F:oracleproduct10.2.0oradata estsystem01.dbf';
SET NEWNAME FOR DATAFILE 2 TO 'F:oracleproduct10.2.0oradata estundotbs01.dbf';
SET NEWNAME FOR DATAFILE 3 TO 'F:oracleproduct10.2.0oradata estsysaux01.dbf';
SET NEWNAME FOR DATAFILE 4 TO 'F:oracleproduct10.2.0oradata estusers01.dbf';
SET NEWNAME FOR DATAFILE 5 TO 'F:oracleproduct10.2.0oradata estusers02.dbf';
SET NEWNAME FOR DATAFILE 6 TO 'F:oracleproduct10.2.0oradata estperfstat.dbf';
SET NEWNAME FOR TEMPFILE 1 TO 'F:oracleproduct10.2.0oradata est emp01.dbf';
[code]....
Recovery Manager complete.It seems when i run alter database open resetlogs i get this:
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: 'F:ORACLEPRODUCT10.2.0ORADATATESTSYSTEM01.DBF'
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Jul 22, 2011
when i am running this syntax in rman i got this error so can you suggust me a correct syntax
Quote:
RMAN> run{
2> allocate channel c1 device type disk maxpiecesize 5m;
3> set backup copies = 2;
4> backup datafile 1 format 'E:
ol\%u_%c','E:
ol\%u_%c';
5> }
allocated channel: c1
channel c1: sid=142 devtype=DISK
executing command: SET BACKUP COPIES
Starting backup at 22-JUL-11
channel c1: starting full datafile backupset
channel c1: specifying datafile(s) in backupset
input datafile fno=00001 name=E:ORACLEPRODUCT10.2.0ORADATAORCLSYSTEM01.DBF
[code]...
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Aug 5, 2012
I taking export using consistent parameter. Theoretically i can understand . practically i couldn't understand how it works.
for ex
I am updating tab1 table under sams user. table having one lakh records.
while updating the query using consistent=y and consistent=n. i mean
exp sams/sams file=cons.dmp owner=sams consistent=y
exp sams/sams file=cons2.dmp owner=sams consistent=n
then both files imported to separate user(sam ,san).
Updated info not visible in san and sam user.
I want to know practically how it works. I need perfect example. while using consistent=y and consistent=n
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Nov 22, 2010
I have some questions about Oracle + EMC shared storage. I have Oracle 11gR1 RAC (2nodes) + ASM environment with shared shorage EMC Clariion AX4.
The database is running no archivelog mode. I'd like to implement point-in-time recovery using Snap View snapshots.
Currently my AX4 platform has the following LUNS:
LUN1 - registry 1
LUN2 - registry 2
LUN3 - vote 1
LUN4 - vote 2
LUN5 - vote 3
LUN6 - ASM - DISKGROUP DATA DISK DATA01 (actual db datafiles)
LUN7 - ASM - DISKGROUP DATA DISK DATA02 (actual db datafiles)
Using source LUNs in consistent session will take sync snapshots of all the LUNs working against my database. Once something happens with database, the LUNs can be returned to specific point in time when snapshot consistent session was taken and I'm expecting the database will up and continue to work.
Questions:
1. Is my approach correct at all? (The database is running noarchivelog mode, not dealing with hot backups. The recovery point in time implemented purely via EMC snapshot consistent sessions.)
2. The AX4 platform has a limit 8 source LUNs in session. If I understand it correctly, I can't place more than 8 LUNs in session. What will be the workaround if my database will occupy more than 8 LUNs, I'd like to take their consistent snapshot; for example:
LUN1 - registry 1
LUN2 - registry 2
LUN3 - vote 1
LUN4 - vote 2
LUN5 - vote 3
LUN6 - ASM - DISKGROUP DATA DISK DATA01 (actual db datafiles)
LUN7 - ASM - DISKGROUP DATA DISK DATA02 (actual db datafiles)
LUN8 - ASM - DISKGROUP DATA DISK DATA03 (actual db datafiles)
LUN9 - ASM - DISKGROUP DATA DISK DATA04 (actual db datafiles)
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Feb 8, 2013
I am having performance issues on a query in a production environment that I cannot replicate in our test environment. Our test environment is an import of production. Version information is:
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bi
PL/SQL Release 10.2.0.3.0 - Production
CORE 10.2.0.3.0 Production
TNS for Solaris: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - ProductionWhen I run the query in test, I get the following results using TKPROF
[code]....
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWSThis performance problem started a few weeks ago and the problem seems to be in the high number of consistent reads during fetch. The DBA tried restarting the instance and gathering fresh stats on the tables but that has not made a difference. Now he wants to export the tables, drop the schema and re-import.
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Sep 24, 2013
APEX_ITEM functions do not seem to be working correctly. When I create a region with this query:
select APEX_ITEM.SELECT_LIST_FROM_QUERY(1, 1, 'select ''Jan'' d, 1 r from dual union select ''Feb'' d, 2 r from dual') month_id
from dual I get the error:report error:ORA-06502: PL/SQL: numeric or value error: associative array shape is not consistent with session parametersWhen I run that query in SQL Developer I get this:
<select name="f01" ><option value="%null%">%</option><option value="1" selected="selected">1</option></select>It
works but returns an incorrect result, there is no list.When I run that query in SQL Workshop on apex.oracle.com I get this:
<select name="f01" ><option value="%null%">%</option><option value="2" >Feb</option><option value="1" selected="selected">Jan</option></select>
which is correct.I tried changing NLS_COMP parameter from Linguistic to Binary and changing NLS_SORT to BINARY_CI but that did not make a difference. This seems like a rare problem and generally related to installation but it has me stopped dead in my tracks.
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Mar 31, 2013
I have read almost all docs about distributed transaction on tahihi.oracle.com website,But I can find a statment about this:
Can Oracle always guarrantee the data consistent in a distributed transaction?
For example,there is a distributed transaction on node a,node b and nod c.node b and node c informed node a they were prepared,so node a committed,and inform node b and node c commit.then node b committed and feedback,but network on node c broken at this point,So node a can't not get feedback from node c,but node a and node b has been committed, so what will Oracle do in this condition?
If node c rollback the data on local node, consistent in this distributed transaction was failed ,yes?
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Sep 22, 2010
We performed image copy of production Oracle server (OS and instances) to a backup server. After a few weeks, we try to restore a latest Oracle database backup from production server to backup server. As we know, Oracle instance must be unique on the network.
Even we log on to backup server and bring up the instance, I think that still point to production instance since all init file, TNSNAMES.ora and listener file are still same. If we restore the database, we will end up bring down the production instance and restore on top of productions. How to change instance name on backup server including TNSNAMES, sqlnet, listener files in order for us to restore Oracle database from production to backup server?
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Feb 24, 2013
When we set Consistent parameter as yes during export, we get a consistent dump of the database/ schema from the point it was taken by setting the transaction Read only.
So let say we are exporting a table TAB_1 and at the same time a different user updates one of the row of this table and then another user updated this row again so and so forth. So from where do export gets the image of this row which was present at the point in time when the export was initiated in the first place. Is it the Undo?
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Oct 18, 2012
understanding rman scn based Backup Algorithm .. In SCN based backup do rman generate backup from archivelogs ???
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Jan 24, 2011
I have 2 seperate rman backup one backup is of only datafile ,spfile and controlfile which i am able to restore and recover without any problem say bkp1 taken at 10 am
other set of backup is of only archive log files of same day but later time than datafile backup say bkp2 taken at 8pm...if i restore and recover bkp1 and try to restore bkp2 it gives error datafile exist (possibly due to fact both backup have control file)
if i just restore bkp1 and try to restore bkp2 so that i can do one recover at time
it gives error datafile permission issue (possibly due to fact both backup have control file)
I want to restore database upto 8pm time how can i use both bkp1 and bkp2 to do it(restore datafiles and apply all archive logs on it)
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Dec 23, 2011
What is the meaning of begin backup/end backup.. and what the effect on database...
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Feb 19, 2013
crosscheck backup of database vs crosscheck backup command
RMAN> crosscheck backup;
it shows all backup pieces.
RMAN> crosscheck backup of database;
it shows 2 backup piece of each backupset.
when should be use: crosscheck backup of database;
and when should be use: crosscheck backup;
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Feb 26, 2012
We are doing RMAN Duplicate set until time to refresh daily our test database for our developers and it taking long time to finish. We noticed on the restore log that RMAN was using a day old old backup pieces to refresh the test database and don't immediately use the latest backup pieces instead.
For additional details here's the rman duplicate command we are using which we run daily(mon-sat) at 4am once daily full backup on production completed.
RMAN Duplicate commands:
run
{
set until time "to_date(to_char(sysdate,'Mon DD YYYY') || ' 04:00:00', 'Mon DD YYYY HH24:MI:SS')";
allocate auxiliary channel ch1 type disk;
duplicate target database to testdb;
}
exit
Is there a way on how to let RMAN use the latest backup pieces instead?
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Dec 22, 2012
I created a tablespace named 'data'.During create a new user with default tablespace 'data',I got following error message:
SQL> create user rman identified by rman default tablespace data
temporary tablespace temp
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-01655: unable to extend cluster SYS.C_USER# by 2 in tablespace
OS:Windows XP
Oracle 10g
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Jan 28, 2011
I am tryign to run a split onlike full backup from the os useign the sap command which is linked to rman..Command that i am useing is ...
brbackup -u / -c force -t online_split -m full -p initBR1_onlinefull.sap
The backup goes thru but i get this erro on the end...
BR0522I 57 of 57 files/save sets processed by RMAN
BR0280I BRBACKUP time stamp: 2011-01-26 12.23.26
BR0505I Full database backup (level 0) using RMAN successful
BR0280I BRBACKUP time stamp: 2011-01-26 12.23.28
[code]...
Copyright (c) 1982, 2007, Oracle. All rights reserved.
RMAN>
connected to target database: BR1 (DBID=2250873886)
using target database control file instead of recovery catalog
RMAN> 2> 3> 4> 5> 6> 7> 8> 9> 10> 11> 12> 13> 14> 15> 16> 17> 18> 19> 20> 21> 22> 23> 24> 25> 26> 27> 28>
29> 30> 31> 32> 33> 34> 35> 36> 37> 38> 39> 40> 41> 42
[code]...
Recovery Manager complete.
ERR_RC: 1
BR0280I BRBACKUP time stamp: 2011-01-26 12.23.32
BR0279E Return code from 'brtools -f printcmd -U /oracle/BR1/sapbackup/..befcdgxn..cmd -C
/oracle/BR1/sapbackup/.befcdgxn.cmd | rsh scrbdefrmr207 /bin/sh -c "'LANG=C SHELL=/bin/sh/oracle/BR1/102_64/bin/rman
[code]...
I have check on the system .. There is not file like that but thwre on on the db i,e
eshtsm20:orabr1 88> pwd
/oracle/BR1/sapdata1/perfman_1
eshtsm20:orabr1 89> ls -ltr
total 102408
-rw-r----- 1 orabr1 dba 104865792 Aug 30 09:05 perfman.data1
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May 2, 2011
I have facing problem while taking backup on Windows 7 client of Oracle 11g R2 database. I have installed oracle 11gR2 for windows on windows 7 machine. I have created a directory like below in database.
On Database Server
SQL> create directory win_expdp_dir as 'd:expimp';
Directory created.
SQL> grant read, write on directory win_expdp_dir to lab;
Grant succeeded.
On Windows 7 machine (client machine)
D:appproduct11.2.0client_1BIN>expdp lab/lab@wbdata.wbh-db11g DIRECTORY=win_expdp_dir DUMPFILE=lab.dmp LOGFILE=lab.log
Export: Release 11.2.0.1.0 - Production on Mon May 2 12:51:44 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORA-39002: invalid operation
ORA-39070: Unable to open the log file.
I have give all sharing rights on d:expimp directory. My main question is why i'm getting this error. Is there any thing missing in setup. how to take export on windows 7 client.
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Mar 15, 2011
I am trying to clone a database on another server with different direcory structure. So that path on the source db server are /u04 whereas on on target db server it would be /u03.
Since this I am testing it on small database initially I have kept all datafiles, backup and archivelogs at /u04 and /u03 on the source and target db servers respectively Now I have copied the backups from source db server to target and since path is changed, I cataloged it
However during restore I am getting
Quote:ORA-19870: error reading backup
Here are the session details
RMAN> catalog start with '/u03/oradata/db7fra';
searching for all files that match the pattern /u03/oradata/db7fra
List of Files Unknown to the Database
=====================================
File Name: /u03/oradata/db7fra/DB7/archivelog/2011_03_15/o1_mf_1_16_6qyvpb3w_.arc
File Name: /u03/oradata/db7fra/DB7/backupset/2011_03_15/o1_mf_annnn_TAG20110315T123018_6qypyv5v_.bkp
[code].....
I have altered permissions on the backup files as well but of no use
oracle@dev-biz:/u03/oradata/db7fra/DB7/backupset/2011_03_15 $ls -ltr
total 545260
-rwxrwxrwx 1 oracle dba 12419072 Mar 15 13:52 o1_mf_ncsnf_TAG20110315T123008_6qypyrz2_.bkp
-rwxrwxrwx 1 oracle dba 3072 Mar 15 13:52 o1_mf_annnn_TAG20110315T125043_6qyr54to_.bkp
-rwxrwxrwx 1 oracle dba 426496 Mar 15 13:52 o1_mf_annnn_TAG20110315T125006_6qyr3zk4_.bkp
-rwxrwxrwx 1 oracle dba 14336 Mar 15 13:52 o1_mf_annnn_TAG20110315T123018_6qypyv5v_.bkp
[code].....
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Aug 7, 2012
I've read a lot about the different types of backup available with Oracle (hot and cold backup). However, I was thinking of a different way of performing this task. I'm currently using Windows Server 2008 R2 and Oracle 11g Standard Edition. I'd like to schedule an entire backup of my server via the utility "Windows Server Backup" (available for free).That way, I could recover my entire server with all the programs and files in case the latter crashes.I'm wondering if this solution could be used as a way of backing up (and recovering) the Oracle database. Should I still set up a regular hot backup with the Archivelog mode enabled in case some operations/transactions were being done at the time of the crash (for the data integrity)?
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Sep 27, 2011
Suppose I take a multi stream backup, say 3 streams.
So if a control file is backed up in say backup set 1, so is the whole control file is backed up in one backup piece or it may span multiple pieces?
A backup set may have multiple backup pieces.
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Jul 11, 2012
I want to ask if I restore a control file from backup of say day2 and I recover till day1 using RMAN script, then what will be the state of my database? I mean day2 control file may be having SCN-Day2, and I am instructing RMAN to recover till past point in time that is SCN-Day1.
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Feb 9, 2011
Is it possible to restore dropped table OR wrongly updated table using RMAN backup.
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