Compress and Ship Archive Logs to DR

I am currently working on Oracle 10.2.0.3, Linux 5.5 DR Setup. DR is at a remote location. Automatic Synchronous Archive shipping is enabled. As the DR is at a remote location transferring 500MB archive logs has a load on the bandwitdh. Is there anyway I can compress and send the archivelogs to DR? I am aware of the 11g parameter Compression=enabled, but i guess theres nothing on similiar lines for 10g.
Kindly help!
Regards,
Bhavi Savla.

AliD wrote:
What is "Automatic Synchronous Archive shipping"? Do you mean your standby is in MAXPROTECTION or MAXAVAILABILITY mode? I fail to see how transfering only 500MB of data to anywhere is a problem. Your system should be next to idle!
Compression is an 11g feature and is licensed (advanced compression license). Also if I'm not mistaken, 10.2.0.3 is out of support. You should plan to upgrade it as soon as possible.
Edit - It seems you mean your archivelogs are 500MB each not total of 500MB for the day. In that case to eliminate the peaks in transfer, use LGWR in async mode.
Edited by: AliD on 10/05/2012 23:24It is a problem as we have archives generating very frequently!!!

Similar Messages

Is RMAN only way to take backup and delete Archive Logs?

On primary db:
===============
OS: Windows 2003 server 32-bit
Oracle: Oracle 10g (10.2.0.1.0) R2 32-bit
On Physical standby db:
===============
OS: Windows 2003 server 32-bit
Oracle: Oracle 10g (10.2.0.1.0) R2 32-bit
Data Guard just configured. Archive Logs are properly being shipped to standby db. Is RMAN only way to take backup and delete Archive Logs from both primary and standby db? What other command can be used?
Thanks

No, but anything else is way more work. Without using RMAN you would have to find another way to keep track of applied logs.
RMAN make this very simple :
RMAN> CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON ALL STANDBY;Using another method would be like using the handle of your screwdriver as a hammer.
See "RMAN Recipes for Oracle Database 11g" ISBN 978-1-5959-851-1
Best Regards
mseberg

Full backup and backup archive logs

Hello,
today in the early morning i did backup of my db with :
RMAN> backup as COMPRESSED BACKUPSET DATABASE format '/backup/%d_t%t_s%s_p%p';This command created two files :
[oracle@p1 backup]$ ls -l
total 1132680
-rw-r----- 1 oracle oinstall 1155940352 Sep 14 00:44 TEST_t697508918_s5_p1
-rw-r----- 1 oracle oinstall    2785280 Sep 14 00:44 TEST_t697509873_s6_p1Did i backed up archive logs also with this command ?
If I did not, do i have to i n order to have everything to do complete resterer and recovery ?
Is now to late to backup them?

Can you confirm that this backup will be placed in the FRA, it will backup all datafile, control files, spfile and control files all arhchivle logs and when backup finshes then will delete all archive logs ?+
after running that command yo can confirm it by yourself at RMAN prompt.
RMAN> list backup;
List of Backup Sets
===================
BS Key Type LV Size       Device Type Elapsed Time Completion Time
200     Full    509.78M    DISK        00:01:03     15-FEB-07
        BP Key: 202   Status: AVAILABLE Compressed: NO Tag: TAG20070215T171219
        Piece Name: /disk2/PROD/backupset/2007_02_15/o1_mf_nnndf_TAG20070215T171219_2xb17nbb_.bkp
List of Datafiles in backup set 200
File LV Type Ckp SCN    Ckp Time Name
1       Full 421946     15-FEB-07 /disk1/oradata/prod/system01.dbf
2       Full 421946     15-FEB-07 /disk1/oradata/prod/sysaux01.dbf
3       Full 421946     15-FEB-07 /disk1/oradata/prod/undotbs01.dbf
4       Full 421946     15-FEB-07 /disk1/oradata/prod/cwmlite01.dbf
5       Full 421946     15-FEB-07 /disk1/oradata/prod/drsys01.dbf
6       Full 421946     15-FEB-07 /disk1/oradata/prod/example01.dbf
7       Full 421946     15-FEB-07 /disk1/oradata/prod/indx01.dbf
8       Full 421946     15-FEB-07 /disk1/oradata/prod/tools01.dbf
9       Full 421946     15-FEB-07 /disk1/oradata/prod/users01.dbf
BS Key Type LV Size       Device Type Elapsed Time Completion Time
201     Full    7.98M      DISK        00:00:03     15-FEB-07
        BP Key: 203   Status: AVAILABLE Compressed: NO Tag: TAG20070215T171219
        Piece Name: /disk2/PROD/backupset/2007_02_15/o1_mf_ncsnf_TAG20070215T171219_2xb19prg_.bkp
SPFILE Included: Modification time: 15-FEB-07
SPFILE db_unique_name: PROD
Control File Included: Ckp SCN: 421968       Ckp time: 15-FEB-07
BS Key Size       Device Type Elapsed Time Completion Time
227     30.50M     SBT_TAPE    00:00:11     15-FEB-07
        BP Key: 230   Status: AVAILABLE Compressed: NO Tag: TAG20070215T171334
        Handle: 0bia4rtv_1_1   Media:
List of Archived Logs in backup set 227
Thrd Seq     Low SCN    Low Time Next SCN   Next Time
1    5       389156     15-FEB-07 411006     15-FEB-07
1    6       411006     15-FEB-07 412972     15-FEB-07
1    7       412972     15-FEB-07 417086     15-FEB-07
1    8       417086     15-FEB-07 417114     15-FEB-07
1    9       417114     15-FEB-07 417853     15-FEB-07
1    10      417853     15-FEB-07 421698     15-FEB-07
1    11      421698     15-FEB-07 421988     15-FEB-07list backup will show you everything.
Would then this be incremental level 0 backup ?
yes by default i think so.
so with this i must be able to flasback my database at least 3 day in the past if i understood correctly.
But i am little puzled about purging those flasback data ...
Can you point me please to some link or tell how can i purge logs that are not need for that flashback period... ?
please read this link
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/rpfbdb003.htm#sthref513
Khurram

Primary/standby and 3rd archive log destination?

Running Oracle EE 10.2.0.4 linux 64 bit. I have a primary and standby configuration using data guard, with appropriate LOG_ARCHIVE_DEST_1, LOG_ARCHIVE_DEST_2 for the primary and standby - all works as expected. I want to multiplex the log files by adding a 3rd archive log destination to a different disk. I'm not clear on whether or not specifying a second 'primary' archive destination will write to both dest_1 and dest_3 or just alternate between the 2? I want to make sure that both DEST_1 and DEST_3 are written to (there can be a lag for DEST_3) -
Is the following all I need or are there additional parameters to LOG_ARCHIVE_DEST_n I'm missing?
LOG_ARCHIVE_DEST_3 = 'valid_for=(ONLINE_LOGFILE,ALL_ROLES)', 'location="/myThirdLoc"'
Thanks -

The database hang because of the redo log file is full. my test database is 16.7G and I gave the recovery filesystem 19 G for the redo log. Apparently it is not enough. After i set up the backup with daily incremental and run for 5 days, the recovery is full and db hang. How do you free up the space or set up the backup so that it can recycle the space? My DB is 10g r2 on RHEL3.

How to recover datafile in Oralcle 10g...? No backups and No archive log

All,
I need to recover the datafile 2 which is for undo tablespace and it is in recover state and i need to recover the data files now .
But the bad thing is We dont have backup at all and we dont have archive logs (Archive log disabled in the database)...
In this situation how can i recover the datafile ...?
SQL> select a.file#,a.name,a.status from v$datafile a,v$tablespace b where a.ts#=b.ts#;
FILE# NAME STATUS
1 /export/home/oracle/flexcube/product/10.2.0/db_1/oradata/bwfcc73/system01.dbf SYSTEM
*2 /export/home/oracle/logs/bw/undotbs01.dbf RECOVER*
3 /export/home/oracle/flexcube/product/10.2.0/db_1/oradata/bwfcc73/sysaux01.dbf ONLINE
4 /export/home/oracle/datafiles/bw/bwfcc73.dbf ONLINE
5 /export/home/oracle/datafiles/bw/bwfcc73_01.dbf ONLINE
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 4940
Current log sequence 4942

Hi,
First of all you must Open a ticket with oracle Support and explore the options
You can use this note to fix it:
RECOVERING FROM A LOST DATAFILE IN A UNDO TABLESPACE [ID 1013221.6]
If you is Unable to Drop Undo tablespace Since Undo Segment is in Needs Recovery
You can Upload the following trace file while opening the ticket
SQL>Alter session set tracefile_identifier='corrupt';
SQL>Alter system dump undo header "<new of undo segment in recover status>";
Go to udump
ls -lrt *corrupt*
Upload this trace file
Also upload the alert log fileRegards,
Levi Pereira
Edited by: Levi Pereira on Nov 29, 2011 1:58 PM

How to Recover database from old backup and full archive log file

Hi Oracle expert!
I met problem when restore my oracle database.
In my case:
- My database version: 10.2.0.2
- I have a database full backup (01-Nov)
- I have all Archived log file from (01-Nov -> 05-Nov)
- My database drop in 05-Nov with disk error (no datafile, no redo..).
- I have no any RMAN backup from (01-Nov -> 05-Nov)
How can i restore my database to 05-Nov?
Thanks

user10280724 wrote:
Hi Chinar.
When i used RMAN flow as your step, but i met the problem!
- After recover database i select sequence#, applied from v$archived_log;
--> it apply newest archived log that i had.
- but when I select Data from table created between 01-Nov to 05-Nov, it not found!
Not the same way the step:
SQL> RECOVER DATABASE USING BACKUP CONTROLFILE UNTIL CANCEL?
It apply newest the same archived log i had table created between 01-Nov to 05-Nov.
How can i do with RMAN to recover my table?That is not possible,if your all available archive logs applied using rman or through sqlplus(recover database using backup controlfile until cancel) and one of these logs contain your table then there are not any problems.So there are not any difference between recovery using rman and user managed(using sqlplus),but there main matter is applying all archive logs.So first check through rman list copy of archivelog all or list backup of archivelog all and identify there in rman repository is any information or not about these logs.

Dataguard sync and applying archive log

Just did a check on my primary and standby using:
Primary:
SELECT max(sequence#) AS "PRIMARY" FROM v$log_history;
PRIMARY
45527
Standby:
SELECT max(sequence#) AS "STANDBY", applied FROM v$archived_log GROUP BY applied:
STANDBY APP
45476 NO
45528 YES
My question is how do I fix my sync?

SQL> select OPEN_MODE from v$database;
OPEN_MODE
MOUNTED
SQL> recover standby database until cancel;
ORA-01153: an incompatible media recovery is active
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
Database altered.
SQL> recover standby database until cancel;
ORA-00279: change 4558008 generated at 08/21/2010 14:02:39 needed for thread 1
ORA-00289: suggestion : /data_gpfs/oracle/archivelogs/1_112_726952005.dbf
ORA-00280: change 4558008 for thread 1 is in sequence #112
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
*/data_gpfs/oracle/archivelogs/2_118_726952005.dbf*
ORA-00325: archived log for thread 1, wrong thread # 2 in header
ORA-00334: archived log: '/data_gpfs/oracle/archivelogs/2_118_726952005.dbf'

RMAN archive logs backup and restore in RAC environment.

Hello All,
I have a 8 node RAC using ASM production database and a single node standby database using ASM. I have archive log gap on the standby database and the archive logs on the primary database is backed up and removed.
I need to resync the standby database using RMAN backup/restore.
Could you please help me on how to backup the specific archive logs file (all threads) from production and restore/recover the standby database. Any specific RMAN script or Metalink ID will help alot.
Details:
Source: 8 node RAC, ASM, Linux,
target: Non-RAC, ASM, Linux.
Regards,

You can try LIKE clause of BACKUP ARCHIVELOG such as:
RMAN> backup archivelog like '%XE%2010%20%';
Starting backup at 20-AUG-10
using channel ORA_DISK_1
channel ORA_DISK_1: starting archive log backupset
channel ORA_DISK_1: specifying archive log(s) in backup set
input archive log thread=1 sequence=58 recid=19 stamp=727519553
input archive log thread=1 sequence=59 recid=20 stamp=727544121
input archive log thread=1 sequence=60 recid=21 stamp=727544127
channel ORA_DISK_1: starting piece 1 at 20-AUG-10
channel ORA_DISK_1: finished piece 1 at 20-AUG-10
piece handle=C:\ORACLEXE\APP\ORACLE\FLASH_RECOVERY_AREA\XE\BACKUPSET\2010_08_20\
O1_MF_ANNNN_TAG20100820T154401_66X1O353_.BKP tag=TAG20100820T154401 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:04
Finished backup at 20-AUG-10or you can try SEQUENCE clause:
RMAN> backup archivelog sequence between 58 and 60 thread 1;
Starting backup at 20-AUG-10
using channel ORA_DISK_1
channel ORA_DISK_1: starting archive log backupset
channel ORA_DISK_1: specifying archive log(s) in backup set
input archive log thread=1 sequence=58 recid=19 stamp=727519553
input archive log thread=1 sequence=59 recid=20 stamp=727544121
input archive log thread=1 sequence=60 recid=21 stamp=727544127
channel ORA_DISK_1: starting piece 1 at 20-AUG-10
channel ORA_DISK_1: finished piece 1 at 20-AUG-10
piece handle=C:\ORACLEXE\APP\ORACLE\FLASH_RECOVERY_AREA\XE\BACKUPSET\2010_08_20\
O1_MF_ANNNN_TAG20100820T154911_66X1YRJL_.BKP tag=TAG20100820T154911 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:04
Finished backup at 20-AUG-10or
RMAN> backup archivelog sequence between 58 and 60;
Starting backup at 20-AUG-10
using channel ORA_DISK_1
channel ORA_DISK_1: starting archive log backupset
channel ORA_DISK_1: specifying archive log(s) in backup set
input archive log thread=1 sequence=58 recid=19 stamp=727519553
input archive log thread=1 sequence=59 recid=20 stamp=727544121
input archive log thread=1 sequence=60 recid=21 stamp=727544127
channel ORA_DISK_1: starting piece 1 at 20-AUG-10
channel ORA_DISK_1: finished piece 1 at 20-AUG-10
piece handle=C:\ORACLEXE\APP\ORACLE\FLASH_RECOVERY_AREA\XE\BACKUPSET\2010_08_20\
O1_MF_ANNNN_TAG20100820T154748_66X1W5Z0_.BKP tag=TAG20100820T154748 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:04
Finished backup at 20-AUG-10See http://download.oracle.com/docs/cd/B19306_01/backup.102/b14194/rcmsynta008.htm#i78730

Clone database with no archive log mode and downtime with new file structure

We need to clone database with following business requirements :
No downtime at all can be afford
databases are in no archive log mode
data-file locations need to be change to new mount points while cloning for space management factor
Please suggest the best possible methods for same ?

Can you post your version of oracle in 4 digits and OS for better understandig
I dont think you can move the No Archive database to a new location without shutting down.
You just want to move them to the new mount points is it?
1. How big are your datafiles are?
2.How do you backup this DB?
When you move the datafilles then it becomes inconsistent and you need redo logs and probably archive logs to be there to make the file consistent or else it would be prompting for recovery. The chances are your redolog will be overwritten and hence you wont be able to recover.
You need downtime.

Backup and Recovery from Archive Log

Dear all,
I implemented hot backup with oracle9i and
Can anybody suggest me how to backup and recovery archive log ?
Thanks for advance.
Chara

assuming you are using RMAN for backup -
backup ( archivelog all );
backup ( archivelog all delete input ); - to delete from file system.
If you are not using RMAN but backup using a script which puts the tablespaces in hot backup mode then you just need to backup archive log directory.
The archive logs are required when you need to do a database recovery. You don't recover archive log files.
rgds

Archive logs are missing in hot backup

Hi All,
We are using the following commands to take hot backup of our database. Hot backup is fired by "backup" user on Linux system.
=======================
rman target / nocatalog <<EOF
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '$backup_dir/$date/%F';
run {
allocate channel oem_backup_disk1 type disk format '$backup_dir/$date/%U';
#--Switch archive logs for all threads
sql 'alter system archive log current';
backup as COMPRESSED BACKUPSET database include current controlfile;
#--Switch archive logs for all threads
sql 'alter system archive log current';
#--Backup Archive logs and delete what we've backedup
backup as COMPRESSED BACKUPSET archivelog all not backed up delete all input;
release channel oem_backup_disk1;
allocate channel for maintenance type disk;
delete noprompt obsolete device type disk;
release channel;
exit
EOF
=======================
Due to which after command (used 2 times) "sql 'alter system archive log current';" I see the following lines in alert log 2 times. Because of this all the online logs are not getting archived (Missing 2 logs per day), the backup taken is unusable when restoring. I am worried about this. I there any to avoid this situation.
=======================
Errors in file /u01/oracle/admin/rac/udump/rac1_ora_3546.trc:
ORA-19504: failed to create file "+DATA/rac/1_32309_632680691.dbf"
ORA-17502: ksfdcre:4 Failed to create file +DATA/rac/1_32309_632680691.dbf
ORA-15055: unable to connect to ASM instance
ORA-01031: insufficient privileges
=======================
Regards,
Kunal.

All thanks you for help, pleas find additional information. I goth the following error as log sequence was missing. Everyday during hotbackup, there are 2 missing archive logs, which makes our backup inconsistent and useless.
archive log filename=/mnt/xtra-backup/ora_archivelogs/1_32531_632680691.dbf thread=1 sequence=32531
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28768_632680691.dbf thread=2 sequence=28768
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28769_632680691.dbf thread=2 sequence=28769
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28770_632680691.dbf thread=2 sequence=28770
archive log filename=/mnt/xtra-backup/ora_archivelogs/1_32532_632680691.dbf thread=1 sequence=32532
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28771_632680691.dbf thread=2 sequence=28771
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28772_632680691.dbf thread=2 sequence=28772
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28772_632680691.dbf thread=2 sequence=28773
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 12/13/2012 04:22:56
RMAN-11003: failure during parse/execution of SQL statement: alter database recover logfile '/mnt/xtra-backup/ora_archivelogs/2_28772_632680691.dbf'
ORA-00310: archived log contains sequence 28772; sequence 28773 required
ORA-00334: archived log: '/mnt/xtra-backup/ora_archivelogs/2_28772_632680691.dbf'
Let me try the susggestions provided above.

Secondary destination for Archived logs

Version: 10.2, 11.1, 11.2
We occasionally get 'archiver error' on our production DBs due to our LOG_ARCHIVE_DEST_1 being full. How can I have a secondary location for archive logs in case my 'primary' location (LOG_ARCHIVE_DEST_1) becomes full ?
I gather that LOG_ARCHIVE_DEST_2 is reserved for shipping archive logs to Dataguard standby DB in which you specify the tns entry of standby using SERVICE parameter.
Can I specify LOG_ARCHIVE_DEST_3 as my secondary location in case LOG_ARCHIVE_DEST_1 becomes full ? Is it what LOG_ARCHIVE_DEST_n meant for ? Although the documentation says you can have upto 10 locations, I am confused if they are meant to store Multiplexed copies of archive logs ? That is not what I am looking for ?

>
Hi again Tom,
I have one more question:
ALTER SYSTEM SET LOG_ARCHIVE_DEST_4 = 'LOCATION=/disk4/arch';
ALTER SYSTEM SET LOG_ARCHIVE_DEST_3 = 'LOCATION=/disk3/arch
    ALTERNATE=LOG_ARCHIVE_DEST_4';
ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_4=ALTERNATE;
SQL> SELECT dest_name, status, destination FROM v$archive_dest;
DEST_NAME               STATUS    DESTINATION
LOG_ARCHIVE_DEST_1      VALID     /disk1/arch     -------------> Dest1
LOG_ARCHIVE_DEST_2      VALID     +RECOVERY       -------------> Dest2
LOG_ARCHIVE_DEST_3      VALID     /disk3/arch     -------------> Dest3
LOG_ARCHIVE_DEST_4      ALTERNATE /disk4/archMy understanding is (and I'm not terribly sure at the minute - don't have a test system to hand. I haven't
set up a backup/recovery strategy in a while - I just restore backups from time to time (normally every 4 weeks)
to ensure that the database recovers as it should) - my understanding is that under the scheme above
DEST_3 will be a copy of what's in DEST_1. DEST_4 on the other hand will "step in" should DEST_1
or DEST_3 fill up/fail.
As to DEST_2, I'm not sure - maybe something to do with Fast Recovery Area? I've Googled but can't
find anything - the trouble is that all the pages about this contain the word "recovery" and the "+"
sign doesn't appear to affect the search - does "+" mean something special to Google?
I don't have a system at the moment - if you do, why don't you test and see? On a test system, fill
up the file system for DEST_1 with rubbish and check to see what happens?
All of the above is to be taken with a pinch of salt - I don't have a system to hand and am not certain,
so CAVEAT EMPTOR
HTH,
Paul...
Edited by: Paulie on 21-Jul-2012 17:20

How to restore cold backup + archived log files

Hi,
Suppose I take a cold backup on 18th. After that I have four days of archived log files. if the database crashes on 5th day, I have to restore the 18th cold back + 4 days of archived log files. How do I restore since it is a cold backup and I cant do incomplete recovery.
can I use
Recover database ( with 18th cold backup) in mount state and apply archived logs.
Prabhath

The details of how you perform forward recovery using a cold backup depends on
1- rman or manual backup
2- using current or backup control file
3- if rman, recovery catalog or no recovery catalog
4- if full database recovered or only a few files
Each of these conditions will affect what is known to Oracle and what needs to be done. For example if you restored the entire cold backup including the control file then Oracle would see a consistent database and not need to perform recovery so you would need to startup mount and tell the database to perform recovery using a backup control file. If using rman and no recovery catalog you might need to catalog some of the archived redo logs, etc....
It is advisable to consult the Backup and Recovery manuals before attempting recovery for any new scenario.
HTH -- Mark D Powell --

Archived log

hi
size of archived log on my system is growing very rapidly. i have to delete the enteries in archive log file on weekly basis. how can i do it?

If you are using RMAN to backup your database, you should also use RMAN to backup and delete archived log files.
If you are not using RMAN, you must use an OS command (Unix: rm / Windows: del) to delete archived log files after making sure that they have been correctly backed up.
See also:
Delete old archived log files
Message was edited by:
Pierre Forstmann

How to determine which archive logs are needed in flashback.

Hi,
Let's assume I have archive logs 1,2,3,4, then a "backup database plus archivelogs" in RMAN, and then archive logs 5+6. If I want to flashback my database to a point immediately after the backup, how do I determine which archive logs are needed?
I would assume I'd only need archive logs 5 and/or 6 since I did a full backup plus archivelogs and the database would have been checkpointed at that time. I'd also assume archive logs 1,2,3,4 would be obsolete as they would have been flushed to the datafiles in the checkpoint.
Are my assumptions correct? If not what queries can I run to determine what files are needed for a flashback using the latest checkpointed datafiles?
Thanks.

Thanks for the explanation, let me be more specific with my problem.
I am trying to do a flashback on a failed primary database, the only reason why I want to do a flashback is because dataguard uses the flashback command to try and synchronize the failed database. Specifically dataguard is trying to run:
FLASHBACK DATABASE TO SCN 865984
But it fails, if I run it manually then I get:
SQL> FLASHBACK DATABASE TO SCN 865984;
FLASHBACK DATABASE TO SCN 865984
ERROR at line 1:
ORA-38754: FLASHBACK DATABASE not started; required redo log is not available
ORA-38761: redo log sequence 5 in thread 1, incarnation 3 could not be accessed
Looking at the last checkpoint I see:
CHECKPOINT_CHANGE#
865857
Also looking at the archive logs:
RECID STAMP THREAD# SEQUENCE# FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# RESETLOGS_CHANGE# RESETLOGS
25 766838550 1 1 863888 10-NOV-11 863892 863888 10-NOV-11
26 766838867 1 2 863892 10-NOV-11 864133 863888 10-NOV-11
27 766839225 1 3 864133 10-NOV-11 864289 863888 10-NOV-11
28 766839340 1 4 864289 10-NOV-11 864336 863888 10-NOV-11
29 766840698 1 5 864336 10-NOV-11 865640 863888 10-NOV-11
30 766841128 1 6 865640 10-NOV-11 865833 863888 10-NOV-11
31 766841168 1 7 865833 10-NOV-11 865857 863888 10-NOV-11
How can I determine what archive logs are needed by a flashback command? I deleted any archive logs with a SCN less than the checkpoint #, I can restore them from backup but I am trying to figure out how to query what is required for a flashback. Maybe this coincides with the point that flashbacks have nothing to do with the backups of datafiles or the checkpoints?

Compress and Ship Archive Logs to DR

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