strategy of redo and control files
Excuse my ignorance in this area (not oracle or a DBA), but from a risk perspective, I read his best practices for storing a redundant copy of recovery logs and control files on a separate disk / server - for redundancy.
However, if the server is a server database physical, with local storage (in which case files of database and the oracle software resides), no configuration of cluster if the server dies a sudden death, then what exactly are the newspapers redundant recovery and control of files will save you of? Is it to minimize the loss of data, or else (told you I wasn't a DBA or Oracle guru). If you back up your recovery connects dialy then I don't know what exactly the redundant copies really are for/record you leave?
So if the server dies (and the storage is still ok) and then transport the storage to another server and you are in business again. Multiplexing or not does not change your ability to use another server.
In a disaster situation, where you lose the server and the storage is also lost, so you have to go to a backup and multiplexing saves you from what it is because the backup has only 1 copy of the controlfile and archivelogs.
If you get a logical corruption (IE a bug in the software) with controlfiles multiplex, then you're still screwed because all controlfiles are physical copies of each other, so all controlfiles have the same corruption. In this case, you must go to a good backup of the controlfile.
Multiplexing allows you to save when you get corruption Physics (due to the corruption of storage) of your command multiplex or multiplex redo logs file, and so you can use the good copy of the file control or redo logs to continue without losing the validated data.
Tags: Database
Similar Questions
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lost control file and datafile addeed restore/recovery without loss of data
Here, I tried the following
created a new table called t2 and made sure the data went to a specific tablespace...
has taken a level 0 backup
remove the control file
couple of datafile to above tablespace was added and then insert more data
then went out to restore the database... but datafile and control file always could not be open? What is wrong here...
-wnet to session 2 and renamed datafile for file unammedSQL> @datafile -- list of datafile Tablespace File Typ Tablespac File Stat Used MB Free MB FILE_MB MAXMB Datafile_name FILE_ID AUT ---------- -------- --------- --------- ---------- ---------- ---------- -------- ------------------------------ ---------- --- UNDOTBS1 Datafile ONLINE AVAILABLE 16 84 100 1,024 /data/trgt/undotbs01.dbf 3 YES USERS Datafile ONLINE AVAILABLE 1153 895 2048 3,072 /data3/trgt/user02.dbf 5 YES CNT_TST Datafile ONLINE AVAILABLE 1 9 10 0 /data3/trgt/cnt_tst01.dbf 7 NO SYSAUX Datafile ONLINE AVAILABLE 626 35 660 32,768 /data/trgt/sysaux01.dbf 2 YES USERS Datafile ONLINE AVAILABLE 2031 17 2048 2,048 /data3/trgt/move/users01.dbf 4 YES SYSTEM Datafile ONLINE AVAILABLE 712 58 770 32,768 /data/trgt/system01.dbf 1 YES USERS Datafile ONLINE AVAILABLE 65 35 100 32,768 /data3/trgt/users03.dbf 6 YES 7 rows selected. -- new table is created called t2 and its going into TS called cnt_tst SQL> CREATE TABLE TEST.T2 ( C1 DATE, C2 NUMBER, C3 NUMBER, C4 VARCHAR2(300 BYTE) ) TABLESPACE cnt_tst; 2 3 4 5 6 7 8 Table created. -- data inserted SQL> INSERT INTO test.T2 SELECT * FROM (SELECT SYSDATE, ROWNUM C2, DECODE(MOD(ROWNUM,100),99,99,1) C3, RPAD('A',300,'A') C4 FROM DUAL CONNECT BY LEVEL <= 10000) ; 2 3 4 5 6 7 8 9 10 11 12 13 14 15 10000 rows created. SQL> commit; Commit complete. -- to check of cnt_tst has any free space or not, as we can see its full SQL> @datafile Tablespace File Typ Tablespac File Stat Used MB Free MB FILE_MB MAXMB Datafile_name FILE_ID AUT ---------- -------- --------- --------- ---------- ---------- ---------- -------- ------------------------------ ---------- --- UNDOTBS1 Datafile ONLINE AVAILABLE 16 84 100 1,024 /data/trgt/undotbs01.dbf 3 YES USERS Datafile ONLINE AVAILABLE 1153 895 2048 3,072 /data3/trgt/user02.dbf 5 YES SYSAUX Datafile ONLINE AVAILABLE 626 35 660 32,768 /data/trgt/sysaux01.dbf 2 YES USERS Datafile ONLINE AVAILABLE 2031 17 2048 2,048 /data3/trgt/move/users01.dbf 4 YES SYSTEM Datafile ONLINE AVAILABLE 712 58 770 32,768 /data/trgt/system01.dbf 1 YES USERS Datafile ONLINE AVAILABLE 65 35 100 32,768 /data3/trgt/users03.dbf 6 YES CNT_TST Datafile ONLINE AVAILABLE 10 0 10 0 /data3/trgt/cnt_tst01.dbf 7 NO 7 rows selected. SQL> select count(*) from test.t2; COUNT(*) ---------- 10000 1 row selected. -- to get a count and max on date SQL> select max(c1) from test.t2; MAX(C1) ------------------ 29-feb-12 13:47:52 1 row selected. SQL> -- AT THIS POINT A LEVEL 0 BACKUP IS TAKEN (using backup database plus archivelog) SQL> -- now control files are removed SQL> select name from v$controlfile; NAME -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- /ctrl/trgt/control01.ctl /ctrl/trgt/control02.ctl 2 rows selected. SQL> SQL> ! rm /ctrl/trgt/control01.ctl SQL> ! rm /ctrl/trgt/control02.ctl SQL> ! ls -ltr /ctrl/trgt/ ls: /ctrl/trgt/: No such file or directory SQL> -- new datafile is added to CNT_TST TABLESPACE and new data is added as well SQL> ALTER TABLESPACE CNT_TST ADD DATAFILE '/data3/trgt/CNT_TST02.dbf' SIZE 100M AUTOEXTEND OFF; Tablespace altered. SQL> ALTER SYSTEM CHECKPOINT; System altered. SQL> alter system switch logfile; System altered. SQL> / System altered. SQL> / System altered. SQL> ALTER TABLESPACE CNT_TST ADD DATAFILE '/data3/trgt/CNT_TST03.dbf' SIZE 100M AUTOEXTEND OFF; Tablespace altered. SQL> INSERT INTO test.T2 SELECT * FROM (SELECT SYSDATE, ROWNUM C2, DECODE(MOD(ROWNUM,100),99,99,1) C3, RPAD('A',300,'A') C4 FROM DUAL CONNECT BY LEVEL <= 10000) ; 2 3 4 5 6 7 8 9 10 11 12 13 14 15 10000 rows created. SQL> / 10000 rows created. SQL> commit; Commit complete. SQL> INSERT INTO test.T2 SELECT * FROM (SELECT SYSDATE, ROWNUM C2, DECODE(MOD(ROWNUM,100),99,99,1) C3, RPAD('A',300,'A') C4 FROM DUAL CONNECT BY LEVEL <= 40000) ; 2 3 4 5 6 7 8 9 10 11 12 13 14 15 40000 rows created. SQL> commit; Commit complete. SQL> @datafile -- to make sure new datafile has been registered with the DB Tablespace File Typ Tablespac File Stat Used MB Free MB FILE_MB MAXMB Datafile_name FILE_ID AUT ---------- -------- --------- --------- ---------- ---------- ---------- -------- ------------------------------ ---------- --- CNT_TST Datafile ONLINE AVAILABLE 9 91 100 0 /data3/trgt/CNT_TST03.dbf 9 NO UNDOTBS1 Datafile ONLINE AVAILABLE 16 84 100 1,024 /data/trgt/undotbs01.dbf 3 YES USERS Datafile ONLINE AVAILABLE 1153 895 2048 3,072 /data3/trgt/user02.dbf 5 YES CNT_TST Datafile ONLINE AVAILABLE 9 91 100 0 /data3/trgt/CNT_TST02.dbf 8 NO SYSAUX Datafile ONLINE AVAILABLE 626 35 660 32,768 /data/trgt/sysaux01.dbf 2 YES USERS Datafile ONLINE AVAILABLE 2031 17 2048 2,048 /data3/trgt/move/users01.dbf 4 YES SYSTEM Datafile ONLINE AVAILABLE 712 58 770 32,768 /data/trgt/system01.dbf 1 YES USERS Datafile ONLINE AVAILABLE 65 35 100 32,768 /data3/trgt/users03.dbf 6 YES CNT_TST Datafile ONLINE AVAILABLE 10 0 10 0 /data3/trgt/cnt_tst01.dbf 7 NO 9 rows selected. -- now the count and max ... note count before backup was 10000 and max(c1) was diff SQL> select count(*) from test.t2; COUNT(*) ---------- 70000 1 row selected. SQL> select max(c1) from test.t2; MAX(C1) ------------------ 29-feb-12 13:58:25 1 row selected. SQL> -- now restore starts SQL> shutdown abort; ORACLE instance shut down. SQL> exit Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production With the Partitioning, OLAP, Data Mining and Real Application Testing options [oracle@berry trgt]$ rman Recovery Manager: Release 11.2.0.1.0 - Production on Wed Feb 29 14:01:48 2012 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. RMAN> connect catalog rman/pass@rcat connected to recovery catalog database RMAN> connect target / connected to target database (not started) RMAN> startup nomount; Oracle instance started Total System Global Area 188313600 bytes Fixed Size 1335388 bytes Variable Size 125833124 bytes Database Buffers 58720256 bytes Redo Buffers 2424832 bytes RMAN> restore controlfile from autobackup; Starting restore at 29-FEB-12 14:02:37 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=20 device type=DISK recovery area destination: /backup/trgt/flash_recovery_area database name (or database unique name) used for search: TRGT channel ORA_DISK_1: no AUTOBACKUPS found in the recovery area channel ORA_DISK_1: looking for AUTOBACKUP on day: 20120229 channel ORA_DISK_1: AUTOBACKUP found: /backup/trgt/backup/cont_c-3405317011-20120229-09 channel ORA_DISK_1: restoring control file from AUTOBACKUP /backup/trgt/backup/cont_c-3405317011-20120229-09 channel ORA_DISK_1: control file restore from AUTOBACKUP complete output file name=/ctrl/trgt/control01.ctl output file name=/ctrl/trgt/control02.ctl Finished restore at 29-FEB-12 14:02:39 RMAN> alter database mount; database mounted released channel: ORA_DISK_1 RMAN> recover database; Starting recover at 29-FEB-12 14:02:55 Starting implicit crosscheck backup at 29-FEB-12 14:02:55 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=20 device type=DISK Crosschecked 96 objects Finished implicit crosscheck backup at 29-FEB-12 14:02:57 Starting implicit crosscheck copy at 29-FEB-12 14:02:57 using channel ORA_DISK_1 Finished implicit crosscheck copy at 29-FEB-12 14:02:57 searching for all files in the recovery area cataloging files... no files cataloged using channel ORA_DISK_1 starting media recovery archived log for thread 1 with sequence 13 is already on disk as file /redo_archive/trgt/online/redo01.log archived log for thread 1 with sequence 14 is already on disk as file /redo_archive/trgt/online/redo02.log archived log for thread 1 with sequence 15 is already on disk as file /redo_archive/trgt/online/redo03.log archived log file name=/redo_archive/trgt/archive/1_10_776523284.dbf thread=1 sequence=10 archived log file name=/redo_archive/trgt/archive/1_10_776523284.dbf thread=1 sequence=10 archived log file name=/redo_archive/trgt/archive/1_11_776523284.dbf thread=1 sequence=11 archived log file name=/redo_archive/trgt/archive/1_12_776523284.dbf thread=1 sequence=12 archived log file name=/redo_archive/trgt/online/redo01.log thread=1 sequence=13 RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of recover command at 02/29/2012 14:02:59 ORA-01422: exact fetch returns more than requested number of rows RMAN-20505: create datafile during recovery RMAN-11003: failure during parse/execution of SQL statement: alter database recover logfile '/redo_archive/trgt/online/redo01.log' ORA-00283: recovery session canceled due to errors ORA-01244: unnamed datafile(s) added to control file by media recovery ORA-01110: data file 9: '/data3/trgt/CNT_TST03.dbf' RMAN> -- wnet to session 2 and renamed datafile from unammed
After before was done, went back to session 1 and I tried recovered the DBSQL> select name from v$datafile; NAME -------------------------------------------------------------------------------- /data/trgt/system01.dbf /data/trgt/sysaux01.dbf /data/trgt/undotbs01.dbf /data3/trgt/move/users01.dbf /data3/trgt/user02.dbf /data3/trgt/users03.dbf /data3/trgt/cnt_tst01.dbf /oracle/app/product/11.2.0/dbhome_1/dbs/UNNAMED00008 /oracle/app/product/11.2.0/dbhome_1/dbs/UNNAMED00009 9 rows selected. SQL> alter database create datafile '/oracle/app/product/11.2.0/dbhome_1/dbs/UNNAMED00008' as '/data3/trgt/CNT_TST02.dbf'; Database altered. SQL> alter database create datafile '/oracle/app/product/11.2.0/dbhome_1/dbs/UNNAMED00009' as '/data3/trgt/CNT_TST03.dbf'; Database altered. SQL> select name from v$datafile; NAME -------------------------------------------------------------------------------- /data/trgt/system01.dbf /data/trgt/sysaux01.dbf /data/trgt/undotbs01.dbf /data3/trgt/move/users01.dbf /data3/trgt/user02.dbf /data3/trgt/users03.dbf /data3/trgt/cnt_tst01.dbf /data3/trgt/CNT_TST02.dbf /data3/trgt/CNT_TST03.dbf 9 rows selected.
RMAN> recover database; Starting recover at 29-FEB-12 14:06:16 using channel ORA_DISK_1 starting media recovery archived log for thread 1 with sequence 13 is already on disk as file /redo_archive/trgt/online/redo01.log archived log for thread 1 with sequence 14 is already on disk as file /redo_archive/trgt/online/redo02.log archived log for thread 1 with sequence 15 is already on disk as file /redo_archive/trgt/online/redo03.log archived log file name=/redo_archive/trgt/online/redo01.log thread=1 sequence=13 archived log file name=/redo_archive/trgt/online/redo02.log thread=1 sequence=14 archived log file name=/redo_archive/trgt/online/redo03.log thread=1 sequence=15 media recovery complete, elapsed time: 00:00:00 Finished recover at 29-FEB-12 14:06:17 RMAN> alter database open resetlogs; database opened new incarnation of database registered in recovery catalog starting full resync of recovery catalog full resync complete starting full resync of recovery catalog full resync complete RMAN> exit Recovery Manager complete. [oracle@berry trgt]$ [oracle@berry trgt]$ [oracle@berry trgt]$ sq SQL*Plus: Release 11.2.0.1.0 Production on Wed Feb 29 14:07:18 2012 Copyright (c) 1982, 2009, Oracle. 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 SQL> alter session set NLS_DATE_FORMAT="dd-mon-yy hh24:mi:ss: 2 SQL> SQL> alter session set NLS_DATE_FORMAT="dd-mon-yy hh24:mi:ss"; Session altered. SQL> select count(*) from test.t2; select count(*) from test.t2 * ERROR at line 1: ORA-00376: file 8 cannot be read at this time ORA-01110: data file 8: '/data3/trgt/CNT_TST02.dbf' SQL> select max(c1) from test.t2; select max(c1) from test.t2 * ERROR at line 1: ORA-00376: file 8 cannot be read at this time ORA-01110: data file 8: '/data3/trgt/CNT_TST02.dbf' SQL> alter database datafile 8 online; alter database datafile 8 online * ERROR at line 1: ORA-01190: control file or data file 8 is from before the last RESETLOGS ORA-01110: data file 8: '/data3/trgt/CNT_TST02.dbf' {code} so what did i do wrong in my recovery that i could not get my data?? how can i avoid this?? and restore my DB? Edited by: user8363520 on Feb 29, 2012 12:24 PMuser8363520 wrote:
so can get us this or can't do?You seem to have:
(a) old version of data through rman backup files
(b) old version of the control file
(c) Backed archived redo logs
(d) recovery archived logs that have been recently generated
(e) current online redo logsTherefore, you should be able to bring back the database in the State wherever it was when you made the abandonment.
I don't do enough laps to be able to cite details on the commands to use (and I often find myself using the command line recovery after that file of rman restore, but the steps you need must be)Take a copy of security of the data current, archived and online redo log files.
Restore the backup control file, data files, and archived recovery logs
Recover the database by using up to cancel backup control file
You have to do 'create datafile' bit as the collection hits the 'missing file' bit
You will need to provide the names of the archived and log files online redo recovery reached their
(although, presumably, you could leave copies of the logs stored in the default location)Concerning
Jonathan Lewis
http://jonathanlewis.WordPress.com
Author: core Oracle -
Retrieve by using the backup control file
Hello
I was reading a book called Pro Oracle Database Administration by Darl Kuhn. There, under the theme of "The valuation of the loss of all control files", noted that all data files and control files are restored from a backup, because if we do not restore the data files the RCS in control files would be lower than the data in these scenarios files. Since online redo logs and archived newspapers is applied to the data files to roll forward in a current consistent state and does not roll forward to a control file.
It is then mentioned to use 'recover the database by using the backup control file' then apply the logs (archive and redo if necessary).
However I personally tested this script in a test environment and to bring all the backup control file could issue the same command as above and recover the database.
My question is I know again and archives are applied only to the data files. So how does the control file are synchronized back when we do not restore the backup data files.
Thank you
If we do not restore the data files, the RCS in control files would be lower than the data files. Since online redo logs and archived newspapers is applied to the data files to roll forward in a current consistent state and does not roll forward to a control file.
It would be incorrect you have determined. You can only restore the control files. You can manually create a control file and always do the restore.
My question is I know again and archives are applied only to the data files. So how does the control file are synchronized back when we do not restore the backup data files.
The control file is updated as well.
See you soon,.
Brian -
How can I specify location of the control file when the manual creation of DB?
DB version: 11.2.0.4
OS: Oracle Linux 6.6
The CREATE DATABASE command creates the control file.
CREATE DATABASE command is executed once you start the instance in NOMOUNT State as shown below.
SQL > startup nomount pfile=$ORACLE_HOME/dbs/initBRCPRD.ora
SQL > create database 'BRCPRD '.
MaxInstances 32
MAXLOGHISTORY 1
maxLogFiles 192
maxlogmembers 3
..
.
.
< snipped >
When you create the database manually, we can define the control_files parameter in the init.ora as below and control file will be created at this location. Right?
control_files = ("" / u01/oradata/BRCPRD/BRCPRD_control01.ctl","/u01/oradata/BRCPRD/BRCPRD_control02.ctl "")
When I was generating the DB using DBCA GUI creation scripts, it asks to enter the location of the Online redo logs and control files.
I entered my desired location. But, I couldn't find CONTROL_FILES parameter in the init.ora file generated the DBCA. This is why I got confused. I think that DBCA is internally somehow. So thought I'd post it here.
Hi John, OP
Just checked the init.ora file created by DBCA. Although the parameter CONTROL_FILES is undefined, db_create_file_dest = '+ DATA_DG1' was created. OMF default location is defined by the db_create_file_dest parameter.
So, I could safely use this script for the manual creation of DB, and during the CREATE DATABASE command execution, oracle will place CONTROL_FILES + DATA_DG1 using the format;
+DiskGroup/dbname/filetype/filetypetag.file.incarnation
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We can to restore the content of a game without the backup control file?
Hello
I went in earlier today, a situation when someone (it wasn't me this time!):
(1) a to back up a database and its archivelogs, in a compressed backup sets;
(2) pushed the files to another server and
(3) deleted everything on the server source, including ALL control files and control files.
As he tried to recover the control file was missing and asked for help... I worked around the issue by using the snapshot controlfile he had forgotten (lucky me!)
Now I can not remove from my mind the idea that I won't be so lucky the next time... I wonder if there is another way to work around this problem?
Does anyone have an idea how to restore the contents of a backupset when we lack ALL control files and their backups? I tried to save the backup in the controlfile to a different database, but it does not work. I didn't find anyway to recreate a controlfile with a specific dbid without data files (and those who are in the backupset...).
Any other idea? Best regards
GregoryHi arkzoyd,
Is the only way to restore data from a backup set files using rman an instance and a controlfile so the answer is no.
Kind regards
Tycho -
RMAN control file backup and restore: help needed
Hello guys,.
I am new to RMAN and run RMAN for BACKUP scripts.
Run {}
CONFIGURE REDUNDANCY 1 RETENTION STRATEGY;
SET UP THE DEVICE TYPE DISK PARALLELISM 2 TYPE OF BACKUP BACKUPSET.
backup in compressed format additional effective backupset 0 database tag 'TEST_FULL_BACKUP' '$RMAN_BACKUP/datafiles_backup/bkp_${DD}/%d_%s_%p ';
Backup to compressed backupset archivelog all not saved both 1 FORMAT "$RMAN_BACKUP/arch_backup/bkp_${DD}/ARCH_%d_%s_%p".
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK to '$RMAN_BACKUP/controlfile_backup/bkp_${DD}/%F ';
delete noprompt obsolete;
delete noprompt archivelog all completed before ' sysdate-2';
}
I can see the data file and archieve files backup
$RMAN_BACKUP/datafiles_backup/bkp_${DD}/%d_%s_%p';
'$RMAN_BACKUP/arch_backup/bkp_${DD}/ARCH_%d_%s_%p ';
But control missing in "$RMAN_BACKUP/controlfile_backup/bkp_${DD}/%F";
What is the problem with my order... Help, please
S
RMAN > list backup of controlfile;
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Lost all control files and no available backup... . How to recover the DB
All,
We have lost all control files and no backups available now...
How to proceed on this to recover the database without data loss is possible...?
Oracle 10g on solarisHello
Check out the link:
http://Myracle.WordPress.com/2008/01/11/recover-database-without-control-files-and-redo-log-files/Thank you
A H E E R X -
Cache buffers DB, file Cache Redo, DBWR, LGWR and log and data files
Hi all Experts,
I m very sory for taking your time to a matter of very basic level. in fact, in my mind, I have a confusion about the DB buffer cache and the cache of log buffers
My question is in the DB buffer cache are three types of dirty, pinned and free i-e data. and in Sales, they are all changed data data and are willing to empty in DBRW. and then he write data files.
but again bufers also works for the CDC and all the changed data is temporaryliy chacheed bufers redo and the LGWR writes in the log files. and these data can be data are committed or not. and when the log switch is held, then it writes data to data files commited
My question is that if a log file may have committed data type and stop and when a log switch takes place then only the data are committed are transferred to datafiles, then where are the data no go?
If dirty pads also contain modified data so wath is the diffrence between the bufers and data log data incorrect.
I know that this can be funny. but I m maybe wrong abot the concept. Please correct my concept about this
Thank you very much
Kind regardsuser12024849 wrote:
Hi all Experts,I m very sory for taking your time to a matter of very basic level. in fact, in my mind, I have a confusion about the DB buffer cache and the cache of log buffers
The first thing we do not mention this newspaper stamp in the log buffer cache. It won't make a difference to even call it that, but you should stick with the term normally used.
My question is in the DB buffer cache are three types of dirty, pinned and free i-e data.
Correction, it is the States of the buffer. These aren't the types. A buffer can be available in all of these three States. Also, note even when you would select a buffer, his first PIN before it can be given to you. Apart from this, there is a type more State called instant capture buffer aka CR (coherent reading) buffer that is created when a select query arrives for a buffer inconsitent.
and in Sales, they are all changed data data and are willing to empty in DBRW. and then he write data files.
Yes, that's correct.
but again bufers also works for the CDC and all the changed data is temporaryliy chacheed bufers redo and the LGWR writes in the log files. and these data can be data are committed or not.
That is partially right. The buffer which is written by DBWR in the data file is a full buffer while in the log buffer, it is not the entire block that is copied. Oracle enters the log buffer called vector of change . It's actually the representation of this change that you made in the data block. It is the internal representation of the change that is copied into the log block and is much smaller in size. The size of the buffer of paper compared to the buffer cache is much smaller. What you mentioned about the writing of written data room again or not committed is correct. His transactional change that needs to be protected and therefore is almost always written in the restore log file by progression of the LGWR.
and when the log switch is held, then it writes data to data files commited
Fake! To the command log, Checkpoint is triggered and if I'm wrong, its called point of control of thread . This causes DBWR write buffers dirty this thread in the data file regardless of whether or not they are committed.
>
My question is that if a log file may have committed data type and stop and when a log switch takes place then only the data are committed are transferred to datafiles, then where are the data no go?
As I explained, it is not only the validated data are written to the file data but committed and not committed is written.
If dirty pads also contain modified data so wath is the diffrence between the bufers and data log data incorrect.
Read my response above where I explained the difference.
I know that this can be funny. but I m maybe wrong abot the concept. Please correct my concept about this
No sound is not funny, but make sure that you mix in anything else and understand the concept that he told you. Assuming that before understanding can cause serious disasters by getting the concepts clearly.
Thank you very much
HTH
Aman... -
where is the location of the files in the tablespace and control
Hi all
where is the location of the files of the tablespace and control? TKSFor data files, ask DBA_DATA_FILES V$ DATAFILE
For TempFiles, ask DBA_TEMP_FILES or V$ TEMPFILE
For online redo logs, query v$ LOGFILE
For archived Redo Logs, query v$ ARCHIVED_LOG
for Controlfiles, query v$ CONTROLFILEHemant K Collette
http://hemantoracledba.blogspot.com -
Additional panel in the panels and controls in the Panel generated .h file
I have a sign in my project, it is called LO_LVL_PNL.
The generated header file seems to think that there are more. Here is the 'Panels and controls' section on the generated header file:
/ * Panels and controls: * /.
#define DITHER 1
#define DITHER_CLOSE 2 / * callback function: DITHER_CLOSE_CB * /.
#define DITHER_Dither_Settings 3 / * callback function: DITHER_CONTROL * /.#define LO_LVL_PNL 2
#define LO_LVL_PNL_SENDBUTTON_2 2 / * callback function: DIDsBUTTONcb * /.
#define LO_LVL_PNL_SENDBUTTON_3 3 / * callback function: EraseBUTTONcb * /.
#define LO_LVL_PNL_SENDBUTTON_4 4 / * callback function: SENDBUTTON_noe_cb * /.
#define LO_LVL_PNL_SENDBUTTON 5 / * callback function: SENDBUTTONcb * /.
#define LO_LVL_PNL_RESET_CAN 6 / * callback function: RESET_CAN_CB * /.
#define LO_LVL_PNL_UUTRESPONSE 7 / * callback function: UUT_RESPONSE * /.
#define LO_LVL_PNL_CLEARBUTTON 8 / * callback function: CLEARBUTTONcb * /.
#define LO_LVL_PNL_EXIT_BUTTON 9 / * callback function: cb_quit * /.
#define LO_LVL_PNL_Comm_Set_TEXTBOX 10
#define LO_LVL_PNL_COMMANDBUTTON 11 / * callback: CheckState * /.
#define LO_LVL_PNL_COMMANDBUTTON_2 12 / * callback function: Select_Files_DID * /.
#define LO_LVL_PNL_BINARYSWITCH 13 / * callback function: SetProgram * /.in my IUR I can find LO_LVL_PNL components, but not parts of DITHERING.
Then, I renamed my generated header file, so it can regenerate without these additional items, but they get included when I recreate it.
In the file of the UIR, if I double click on he Panel it opens and displays that the Panel is called LO_LVL_PNL.
It started because I'm trying to read the value of a switch on the Panel, and in the call, I get a runtime error that follows:
GetCtrlAttribute (LO_LVL_PNL, LO_LVL_PNL_BINARYSWITCH, ATTR_ON_VALUE, & on_off);
NO MORTALS RUN - TIME ERROR: 'gui_handler.c', line 135, col 13, thread id 0x0000179C: library function error (return value ==-42 [0xffffffd6]). The handle is not a panel handle
I don't know if it's two separate issues, or DITHER things cause the error; but I need help to fix both.
The first parameter to GetCtrlAttribute() must be the handle Panel, not the ID of the Panel. The handle is returned by your LoadPanel() call.
Do you already have a group called DITHERING? Copied from an earlier project, perhaps? Perhaps the editor of UIR has hidden or placed outside the screen. Try using the option editor find to see.
JR
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"Properties > tab security for My Documents and my pictures show that home users of the system, my own account and administrators (I'm also administrator) have full control ' (with all the boxes"Allow". But the properties of each individual in My Documents and my pictures folder and all files in those, show 'Read only', and all the ticks in the Security tab are grayed out for all users or groups names.
I cannot understand the explanation in the section using the Access command ('Object Types', 'Object name' etc) when I try to change this tab for a file or folder. Help, please!
Hi Angela,.
Welcome to the Microsoft community forum. Let me help you with your concern.
The security settings for the my document and other folders in the library will have complete control and the tick mark you are talking about will be by default on all Windows 7 computers. Some folders inside of it will be in read-only by default. You can remove by box to uncheck Read-only in the properties of the folder.
To find out how to find, organize, and use files and folders on your computer, see using files and folders
For answers to frequently asked questions on the application of the permissions to a file or folder, see what to know before applying permissions to a file or a folder
You can also check these links:
File and folder permissions
http://TechNet.Microsoft.com/en-us/library/cc732880.aspx
Access control
http://TechNet.Microsoft.com/en-us/library/cc770749.aspx
I hope this helps. If you need help with Windows, let us know and will be happy to help you.
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I closed my shot explorer.exe process in my task manager and now I can't load my computer, control panel and these files, can someone help me? When I try to open their message comes that: {26EE0668-A00A-44D7-9371-BEB064C98683} not this interface supported...
Hi MAMARDA,
Welcome to the Microsoft Vista answers Forum!
I would like to ask you a few questions in order to get a better understanding of this issue so that we can better help you.
(a) what version of Windows 7 use you?
(b) what is the exact error message you are getting?
Method 1: You can also try to perform a file system (scan SFC) verification tool. This tool will fix the system files are corrupted.
Scan SFC enforcement procedure:
1. click on the Start button
2. on the Start Menu, click all programs followed by accessories
3. in the menu accessories, right-click on command line option
4. in the drop-down menu that appears, click the "Run as Administrator" option
5. If you have the User Account Control (UAC) enabled, you will be asked permission before the opening of the command line. You simply press the button continue if you are the administrator or insert password etc.
6. in the command prompt window, type: sfc/scannow then press enter
7. a message is displayed to indicate that "the analysis of the system will start.
8. be patient because the analysis may take some time
9. If all the files need replace SFC will replace them. You may be asked to insert your Vista DVD for this process to continue
10. If all goes although you should, after the analysis, see the following message "Windows resource protection not found any breach of integrity.
11. once the scan is finished, close the command prompt window, restart the computer and check.
Method 2: If this is a recent problem that has developed you can try to perform a system restore and check if it works very well.
To restore the operating system to an earlier point in time, follow these steps:
1. Click Start, type system restore in the search box, and then click System Restore in the list programs.
If you are prompted for an administrator password or a confirmation, type your password or click on continue.
2. in the System Restore dialog box, click on choose a different restore point and then click Next
3. in the list of restore points, click a restore point created before you started having the problem, and then click Next
4. click on finish
Note: When you perform the system restore to restore the computer to a previous state, programs and updates that you have installed are removed.
For more information, please follow the below given link:
How to repair the operating system and how to restore the configuration of the operating system to an earlier point in time in Windows Vista
http://support.Microsoft.com/kb/936212/
Method 3: you can try to start safe mode and restore the system, if you are unable to do it in normal mode.
For a safe boot, you can follow the below given steps:
1. remove all floppy disks, CDs and DVDs from your computer and restart your computer.
Click the Start button, click the arrow next to the button lock and then click on restart.
2. do one of the following:
a. If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you need to try again by waiting until the Windows logon prompt appears, and then stop and restart your computer.
b. If your computer has multiple operating systems, use the arrow keys to select the operating system you want to start in safe mode, and then press F8.
When you are in safe mode, follow the steps mentioned above to complete the restore of the system.
Hope the helps of information.
Please post back and we do know.Concerning
Jeremy K
Microsoft Answers Support Engineer
Visit our Microsoft answers feedback Forum and let us know what you think. -
Control files and backup spfile
Hi allThis is a database of GR 11, 2. There is a running script to keep the full backup.
crosscheck archivelog all; crosscheck backup; backup database; backup archivelog all delete input; delete noprompt obsolete;
I checked the controlfile autobackup using - show controlfile autobackup. and it is turned OFF
But when I run - list backup of controlfile; list backup of spfile;
I find that contolfile benefits from the support upwards and also through the above script spfile
Can someone please explain to me how this happens without controlfile autobackup
Thanks in advance
This is a normal behavior on version 11.2 and beyond
No matter if controlfile autobackup turned OFF, RMAN automatically includes the control file and the server settings file in the backups of data file
1(i.e backup database command always include datafile 1 which trigger backup of control and spfile). -
Control files and spfile backup automatic backup fails
Hi all
I use Oracle RAC 11 g ASM 2. My database is 2 knots RAC1 and RAC2.
I take the RMAN database backup ASM diskgroup (FRA) and RAC1 and RAC2-mounted network file system. I have this requirement backup also outside the DSO.
I put: set UP the CONTROL FILE AUTOBACKUP ON;
I'm runing the node RMAN backup task 2 (RAC2)
I am facing the error when taking a backup to the network file system. below
How would I fix this?Starting Control File and SPFILE Autobackup at 08-SEP-12 RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03009: failure of Control File and SPFILE Autobackup command on ORA_DISK_1 channel at 09/08/2012 18:20:06 ORA-00245: control file backup failed; target is likely on a local file system
Kind regardsHello
Please take a look at the document MOS * RMAN backup fails with Ora-00245 and Rman-08132 [1365484.1 ID] *.
Snapshot must Controlfile location on a location shared between the nodes.
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Hello
10 g R2 on Win 2003,.
can use us dvf to test if the controlfile is damaged or not?
I had it in alertolog:
But the database does not stop.Tue Oct 05 10:05:25 2010 Errors in file d:\oracle\product\10.2.0\admin\MYDB\bdump\opermst_arc0_5616.trc: ORA-00227: corrupt block detected in control file: (block 1, # blocks 1) ORA-00202: control file: 'D:\BASES\MYDB\CTL\CONTROL02.CTL'
I want to know if CONTROL02. CTL' is always corrupted or not?
Must I renew it?
Thank you.user522961 wrote:
Hello
10 g R2 on Win 2003,.
can use us dvf to test if the controlfile is damaged or not?
I had it in alertolog:Tue Oct 05 10:05:25 2010 Errors in file d:\oracle\product\10.2.0\admin\MYDB\bdump\opermst_arc0_5616.trc: ORA-00227: corrupt block detected in control file: (block 1, # blocks 1) ORA-00202: control file: 'D:\BASES\MYDB\CTL\CONTROL02.CTL'But the database does not stop.
I want to know if CONTROL02. CTL' is always corrupted or not?
Must I renew it?Thank you.
You can not check controlfile corruption with DBVERIFY. If this error occurred in the alert.log then your controlfile actually corrupt. Instead this controlfile with copies multiplexes. And post there result of
select name from v$controlfile
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