"If no level 0 backup is available, then the behavior depends upon the compatibility mode setting. If compatibility is >=10.0.0, RMAN copies all blocks changed since the file was created, and stores the results as a level 1 backup. In other words, the SCN at the time the incremental backup is taken is the file creation SCN. If compatibility <10.0.0, RMAN generates a level 0 backup of the file contents at the time of the backup, to be consistent with the behavior in previous releases."
So yes, that's it. Even in the Oracle 11g OCP course and exam, the information given is for Oracle 9 (pre 10g). Seems like a major functional regression. ------------------------------------------------------------------------------------------------------------------------------------------------ Original problem.
Am I not understanding something about rman???? Using oracle 10g standard edition and rman.
No existing backups.
When I run repeated level 1 cumulative incrementals, the appear to back up everything (like a level 0 would). My understanding is that if a level 1 is run w/o an existing level 0 backup, it will generate a level 0 backup. All subsequent level 1 backups should be level 1's as expected.
If I explicitly generate an level 0, followed by level 1's it all works as expected.
I am determining what got backed up by the size of the resulting save sets.
Do I have to do an explicit level 0 and then explicit level 1's? I thought not.
I have large partitioned tables ( 4 partitions are added every month ). Is is possible to collect Incremental Statistics Gathering on these objects ( 9i ). If I collect stats with Ggranularity => ALL and ESTIMATE_PERCENT =100 the stats are accurate but it takes so much time .
One way may be to collect stats as Ggranularity => PARTITION for each new partition ( this quite fast ). but what about the Global Table Stats?
I have RMAN configured TO RECOVERY WINDOW OF 7 DAYS;I do a Level 0 backup on SAT, SUN-FRI I do a Level 1 (all to disk)
After I do a successful Level 0 backup, why would I need to keep Level 1 backups around on disk?I know the recovery window is 7 days but is there any way to remove the other 6 days of Level 1 backups after a successful Level 0?To me this seems like a waste of space since I have a succesful Level 0 or am I missing something?
I've got a physical standby (10g) which is missing some archive logs, and thus the managed recovery is stuck. I followed the procedure for taking an incremental backup of the primary from the last SCN in the standby, and then recovering the standby from that backup using rman.
It seemed that everything went according to the instructions, except that the "recover database" of the standby from the backup went much faster than I expected. Afterwards I checked the SCN of the standby (select current_scn from v$database) and it had indeed updated to a number beyond where it was stuck originally. The standby controlfile was restored from a backup of the primary's current controlfile, and the standby restarted. The problem is that when I started up standby recovery again, the standby is still looking for the logs which were missing. I can't figure out why! I've been googling around and digging through the docs, and the only clues I can find suggest that this would happen if the standby controlfile wasn't updated. But I did that.
We are going to implement oracle 11g. Now I wanna use rman to take the incremental backup in the follwing way:
Level-0 backup weekly, in the way:
run { allocate channel c1 type disk; allocate channel c2 type disk; BACKUP incremental level 0 DATABASE TAG 'Weekly_full' FORMAT 'E:RMAN_backupweekly_full_%d_%Y%M%D_s%s_p%p.bak'; backup archivelog all not backed up 1 times delete input TAG 'Weekly_full_arc' FORMAT 'E:RMAN_backupweekly_full_arc_%d_%Y%M%D_s%s_p%p.bak';
[code].....
and RETENTION POLICY TO RECOVERY WINDOW is set to 10 days, so that there is no chance that i will delete expired backup before taking backup.
Now my question is,
1) Is the way is correct that there is no wrong configuration. My main concern is about archive log, is it correct?
2) As i am deleting archive log files with the backup and after that the expired archive log backup is also deleted, so is there any chance of failure in recovery.
3) here how archive log backup will work with 10 days retention policy.
We just purchased NAS (Raid5) unit to manage our data storage. I am planning to create a virtual partition on this nas device and use one partition for oracle data storage and another virtual partition will be used by other data (files and may be sqlserver data files....etc..)
We will have oracle installed on seperate oracle server. Can we use RMAN to manage incremental backups in this environment? May main worry point is that our data storage device will have many different type of datas and will we be able to tell RMAN to make backups only from certain virtual drives?
I have set the incremental stats for my partition table as it takes more than 20 min to gather , though the incremental is set to 'true' the table is getting analyzed completely.
As part of an incremental backup I recover copies of the tablespaces. These by default are stored in the disk backup location diskgroup. Is it possible to move these copies to another disk group / location whilst still backing up to the default disk backup location diskgroup. I know how to do it with the main datafiles but not with the copies. e.g.
Current situation: Original Datafiles in +DATA Backups in +FRA Recovered Datafile copies in +FRA
New setup to be: Original Datafiles in +DATA Backups in +FRA Recovered Datafile copies in +BACKUP
In Oracle 11g/R2, I created replica of HR.Employees table & executed the following statement (+Although using SUM() function is non-logical in this case, but just testifying the result+)
STEP - 1
SELECT /+ RESULT_CACHE */ employee_id, first_name, last_name, SUM(salary)* FROM HR.Employees_copy WHERE department_id = 20 GROUP BY employee_id, first_name, last_name;
EMPLOYEE_ID FIRST_NAME LAST_NAME SUM(SALARY) ------------------------------------------------------------------------------------------------------- 202 Pat Fay 6000 201 Michael Hartstein 13000
Elapsed: 00:00:00.01
Execution Plan ---------------------------------------------------------- Plan hash value: 3837552314 -------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | -------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 2 | 130 | 4 (25)| 00:00:01 | | 1 | RESULT CACHE | 3acbj133x8qkq8f8m7zm0br3mu | | | | | | 2 | HASH GROUP BY | | 2 | 130 | 4 (25)| 00:00:01 | |* 3 | TABLE ACCESS FULL | EMPLOYEES_COPY | 2 | 130 | 3 (0)| 00:00:01 |
Statistics ---------------------------------------------------------- 0 recursive calls 0 db block gets 0 consistent gets 0 physical reads 0 redo size *690* bytes sent via SQL*Net to client 416 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 2 rows processed
STEP - 2
INSERT INTO HR.employees_copy VALUES(200, 'Dummy', 'User','Dummy.User@email.com',NULL, sysdate, 'MANAGER',5000, NULL,NULL,20);
STEP - 3
SELECT /*+ RESULT_CACHE */ employee_id, first_name, last_name, SUM(salary) FROM HR.Employees_copy WHERE department_id = 20 GROUP BY employee_id, first_name, last_name;
EMPLOYEE_ID FIRST_NAME LAST_NAME SUM(SALARY) -------------------------------------------------------------------------------------------------- 202 Pat Fay 6000 201 Michael Hartstein 13000 200 Dummy User 5000
Elapsed: 00:00:00.03
Execution Plan ---------------------------------------------------------- Plan hash value: 3837552314
Statistics ---------------------------------------------------------- 0 recursive calls 0 db block gets 4 consistent gets 0 physical reads 0 redo size *714* bytes sent via SQL*Net to client 416 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 3 rows processed
In the execution plan of STEP-3, against ID-1 the operation RESULT CACHE is shown which shows the result has been retrieved directly from Result cache. Does this mean that Oracle Server has Incrementally Retrieved the resultset?
Because, before the execution of STEP-2, the cache contained only 2 records. Then 1 record was inserted but after STEP-3, a total of 3 records was returned from cache. Does this mean that newly inserted row is retrieved from database and merged to the cached result of STEP-1?
If Oracle server has incrementally retrieved and merged newly inserted record, what mechanism is being used by the Oracle to do so?
Oracle database concepts 11gr2 manual states that "An incremental checkpoint is a type of thread checkpoint partly intended to avoid writing large numbers of blocks at online redo log switches. DBWn checks at least every three seconds to determine whether it has work to do. When DBWn writes dirty buffers, it advances the checkpoint position, causing CKPT to write the checkpoint position to the control file, but not to the data file headers."
As i have understand the DBWR write DIRTY BUFFER (that are under active checkpoint requests in the ACQ) to the datafiles from The Buffer Checkpoint Queues and after that the CKPT process may write the checkpoint RBA to the control files.[URL]...
The CKPT porcess write the chekpoint RBA to the controlfile after that the DBWR write the Dirty BUFFER in the datafiles, so as i understand at some point the datafiles containt block with higher RBA than the controle files. am i wrong ?
So if the instance craches before the CKPT record the chekpoint RBA in the controlfile what will be the recover behavior.Will the redo record be reapplied from the last recoded chekpoint RBA in the controlfile to the tail of the log ?
Here we have a dataguard environment with db1 as primary and db2 as physical standby database. We configured dataguard in 10g environments and we are not using grid control. What are the steps for configuring rman for incremental backups in this environment?
We want to schedule the backups to be taken in standby db, (that is applicable in case of switchover too). In the case of switchover to db2 what all do we need to do in rman manually to resume backups in db1?
7 of days ago Full backup has been taken to disk due to issues with tape devices.3 days ago tape devices have been fixed and we switched to CommVault managed tape backups. CommVault calls RMAN with following command:
These backups done successfully.Then archivelog backup taken similar way.But when I issue RESTORE DATABASE PREVIEW SUMMARY; RMAN starts with Full backup set, though newer Incremental Level 0 ones are available.Why it does not use these newer ones?
I have a Primary database and Standby database both in ASM. Recently my archive logs got deleted and i am trying to recover my standby database with an incremental backup based on scn from primary database. But i face the below error when i recover the standby database with the incremental backup taken in primary database.
RMAN> recover database noredo;Starting recover at 06-NOV-13using target database control file instead of recovery catalogallocated channel: ORA_DISK_1channel ORA_DISK_1: SID=21 device type=DISKchannel ORA_DISK_1: starting incremental datafile backup set restorechannel ORA_DISK_1: specifying datafile(s) to restore from backup setdestination for restore of datafile 00001: +STDBY/11gdb/datafile/system.258.805921881destination for restore of datafile 00002: +STDBY/11gdb/datafile/sysaux.259.805921967destination for restore of datafile 00003: +STDBY/11gdb/datafile/undotbs1.260.805922023destination for restore of datafile 00004: +STDBY/11gdb/datafile
n my last post I asked abt the issues that I was facing while restoring the full backup of RMAN on a new server. I mentioned the steps as well, Now my Question is what If I want to restore the incremental backup on the new server?
What all steps do I have to follow after restoring the zero level backup on a new server.
I am using the following query to determine if my rman backup succeeded for failed. I look for "COMPLETED WITH ERRORS"
col input_type format a10 col bck_hrs format 99.9 heading "Run|Time" col status format a21 col end_dt format a20 heading "End|Time" col mbytes_per_sec format 9,999 heading "Output|Rate|MB/sec"
[code]...
output ======
End Run Output Rate INPUT_TYPE STATUS Time Time Size GB MB/sec ---------- --------------------- -------------------- ----- ---------- ------ ARCHIVELOG COMPLETED 2011-12-24 06:03:54 .5 189.4 106 DB INCR COMPLETED 2011-12-24 05:33:05 9.3 3,392.6 103 ARCHIVELOG COMPLETED 2011-12-23 10:12:27 .2 73.3 105
I know that the DB INCR is an INCR 0 backup but is there some way query I can join with my example above to tell me this is INCR 0 or FULL BKUP?
I was thinking maybe setting "COMMAND_ID" some text like INCR 0 or INCR 1 or FULL BKUP. Does that sound feasible
I have main database Server which is located on Server A, now I have to take the RMAN Backup of Server A and then shift the complete database on new Server B.
I am confused whether to use Backup command with AS COPY option or take the backup as backup sets. Which are the best option that I can use for the RMAN Backup.
I've a little question : Is it possible to use RMMAN to backup 2 tables incrementally ? I don't want to backup all the database but only these 2 tables.
I use kill -9 <pid> and kill the job and then i check ps -ef | grep rman and get no process of RMAN but when i login into Enterprise Manager and click on performance tab so i see the graph of RMAN (yellow in colour) which is still continue and means the RMAN backup is in progress , then i checked the top consumer page so there i see backup incr datafile(SYS$USERS)(26.8%), so i want to down this RMAN backup.i also used the this query to check the RMAN job running or not
select * from V$SESSION where MODULE like 'rman%'; it came up with no rows
2nd Incremental #1 Files updates between the 1st and 2nd - Monday 3rd Incremental #2 Files updates between the 2nd and 3rd - Tuesday 4th Incremental #3 Files updates between the 3rd and 4th - Wednesday 5th Incremental #4 Files updates between the 4th and 5th - Thrusday 6th Incremental #6 Files updates between the 5th and 6th - Friday 7th Incremental #7 Files updates between the 6th and 7th - Saturday 8th Full Backup #8 Files updates from 1st,2nd to 7th - Sunday 9th Incremental #9 Files updates between the 8th and 9th _ Monday 10th Incremental #10Files updates between the 9th and 10th - Tuesday 11th Incremental #11 Files updates between the 10th and 11th - Wednesday 12th Incremental #12 Files updates between the 11th and 12th - Thrusday 13th Incremental #13 Files updates between the 12th and 13th - Friday 14th Incremental #14 Files updates between the 13th and 14th - Saturday 15th Full Backup CRASHES - NOT COMPLETED - Sunday
I would need to restore now from #8 ( full backup ) and #9 to #14 ( incremental backup )
Tell me the "restore command" to achieve the output?
I have one 10g database in other country. I want part of their db (selected tables or tablespaces) and import that data to my 10g DB and i want keep to date this data.
I know two ways
1. Data Pump Imp/Emp via FTP, but i can't send only data that have changed (incremental), i must pumping whole selected part of database (i want only new data from their DB, but consistanse with my DB)
2. RMAN etc. or other archivisation tool, i can do incremental achivisation, but can i send files to another instances (my db) and load only that data? Can i do that with SQL*Loader?
We are trying to restore a database on the different server using RAM incremental level 0 and 1 backups. We have weekly Incremental level 0 backups along with incremental backups on daily basis. During recovery of Incremental level 0 backup, RMAN is expecting/looking for Incremental Level 0 backup of prior week as well. Is this the usual process for RMAN to look for prior level 0 backup though we need to restore from the current level 0 backup and roll forward by a week with subsequent Level 1 backup.?
We intend to restore from the Level 0 of 1/16 and roll forward with daily incrementals till 1/22. RMAN is expecting level 0 backupsets from 1/9 backup as well and keep failing since those backups are not available. quick inputs since we are in middle of recovery and trying to resolve if this is even doable.
Can you take an incremental backup level 1 or level 0 without archivelogs?
syntax would bebackup as compressed backupset cummulative level 1 database.
The reason I ask is because when I run backup as compressed backupset cummulative level 1 database plus archivelogs # it runs fine, but when I run backup as compressed backupset cummulative level 1 database it just hangs.
