The user managed backup hot
HelloWhen we started a tablespace begin backup mode State, I know that the RCS data files will be blocked and the recovery log generation will be more. I just want to know where the DML activities occur when the tablespace mode backup how to get updated records? why there are no changes in the SNA? why there is excess redo generation compared with the normal DML region?
Vincent
This is not true, as a simple audit would have told you.
SQL> select file#, checkpoint_change# from v$datafile;
FILE# CHECKPOINT_CHANGE#
---------- ------------------
1 7667692204
2 7667692204
3 7667692204
4 7667692204
5 7667692204
6 7667692204
7 7667692204
8 7667692204
9 7667692204
10 7667692204
11 7667692204
12 7667692204
12 rows selected.
Note: we start with all files with the same checkpoint change number. All data is synchronized
SQL> alter tablespace data_medium begin backup;
Tablespace altered.
SQL> select file#, checkpoint_change# from v$datafile;
FILE# CHECKPOINT_CHANGE#
---------- ------------------
1 7667692204
2 7667692204
3 7667692204
4 7667692204
5 7667692204
6 7667727909
7 7667692204
8 7667692204
9 7667692204
10 7667692204
11 7667692204
12 7667692204
12 rows selected.
Note: file 6 is now out-of-synch with the rest of the database, as it has been in hot backup mode. Change of control point number is ahead of the rest of the database.
SQL> alter tablespace data_medium end backup;
Tablespace altered.
SQL> select file#, checkpoint_change# from v$datafile;
FILE# CHECKPOINT_CHANGE#
---------- ------------------
1 7667692204
2 7667692204
3 7667692204
4 7667692204
5 7667692204
6 7667727909
7 7667692204
8 7667692204
9 7667692204
10 7667692204
11 7667692204
12 7667692204
12 rows selected.
And to note now that even if the END BACKUP command has been issued, the data files remain in exactly the same state that they were ahead. File 6 is always out of sync with all other files. No additional control points have been issued, and nothing further happened to produce 6 or anything else to do things to re - sync.
Put a tablespace IN backup mode hot indeed causes a control point will take place for this table space. But out of hot backup mode does NOT work. The SNA in the headers of this tablespace will be re - synchronize the next time there is a checkpoint of the whole system, but not until then.
So no, it's NOT ' updated when we take tablespace in backup mode using online redo log files "-Although the syntax of this sentence is so weird as to defy rational explanation and require pure conjecture.
As for questions of the original poster, so:
I just want to know where the DML activities occur when the tablespace mode backup how to get updated records? why there are no changes in the SNA? why there is excess redo generation compared with the normal DML region?
1 DML activities occur quite normally. Put a tablespace in backup mode hot stops CKPT update its header, but does absolutely nothing to prevent your server to update another process the contents of the file. If you update every row to a million lines of table during a hot backup of the repository containing this table, each row is updated, exactly as he would have done if no hot backup took place. It is not property of a backup hot, after all, if the content data file was unflappable frozen for the duration, would it?
2 there IS a change in the SCN when you put a tablespace in mode backup hot. See above. When you exit the hot backup mode, there is no special update for the RCS... but the next time that all the headers of data file are updated through a checkpoint at the system level (caused by things like a log switch or the ADMINISTRATOR requesting a) , then the header will be updated with the SNA as all the other data file headers.
Get some more: this is the checkpoint change the number that is stored in the headers of data files, and it is that which does not change during a backup hot. Number of system change, including change of control point number is simply a snapshot at a point in time, increases continuously throughout the system, all the time.
3. in a user managed backup, it's the operating system that copies things and it copies the things that the operating system is aware of--such as the "operating system block', which is commonly size of 512 bytes. An Oracle block consists of several operating system blocks (16 in the case of a block of 8 K and blocks of 512 bytes OS). Oracle knows 16 blocks BONE to form a block Oracle; the operating system itself has no idea of their interdependence.
Therefore, the silent operating system will copy one of these 16 blocks at any time as seems it, because he realizes that if it copies one, she really should to copy other 15 institutions. If it were a cold maintained by users of backup, which is not serious, because nothing would be happening to all the 16 blocks of BONE, and as long as it took the BONES to copy all of them, the result would be the same, as if all 16 had been copied at the same time.
But it's a hot backup, it happens at these blocks. Therefore, it is possible for the operating system to copy, say, three of them, just at the moment where Oracle is about to change one of its blocks with an update or insertion. Three blocks of BONE thus copied in one State and the other thirteen OS blocks copied in another State. You now have a block of 8K in a backup that is internally in all directions and totally unusable. It's called a cracked block, and that's what happens when a single entity (BONE) copy unconscious things the importance invested in this is it the copy by another (the Oracle database).
The cure for a broken block is to have a clean block copy as it was before the updates that happened to her. This clean copy of the block, you can apply all redo them later generated who touched it. So it is what guarantees Oracle exist. If a tablespace is in hot backup mode, the first update that is subject to change an Oracle block causes this whole block to write in it again connects. There's your own copy. The copy that creates the backup operation is the copied data file can now be fractured or not as chance allows: he'll always be a good version of it stored in the recovery logs.
However, an update that generated usually 200 bytes redo just caused all of a block of 8K to copy in the redo logs. And this increase in the generation of redo is a feature of backups maintained by users (and why you should use RMAN).
Tags: Database
Similar Questions
-
The user managed backup hot via Sql
Hi being a little old school - I'm trying to understand the steps required for a Hotbackup managed through Sql (sorry fans RMAN!)
I understand that I can save each tablespace in turn (via the necessary ALTER TABLESPACE < x > BEGIN BACKUP and then out of backup)
I also assume that I simply take a backup of my control file (wither in binary form or trace if necessary)
I also assume that you do not back up the Redo Logs (since you reset draw on any recovery anyway)
The bit I'm not sure of is the Undo Tablespace - can be backup in eactly the same way as any other tablespaces?
Y at - it all components that I need backup (outside the archive logs)
Thank you
JimAlways provide the Oracle version 4-digit.
The documentation covers all of the steps required for a manual backup.
http://docs.Oracle.com/CD/B28359_01/backup.111/b28270/osbackup.htm#CEGJIHJF
See Chapter 27 Making User-Managed database backup for instructions.
-
user managed backup and deferred tax rollback segments
Hi Forum,
Greetings of the day,
Here I have a question about segments of rollback backup and deferred users managed, I don't have much experience with the user managed backups taken by backup of BEGIN and END.
1. how facilities oracle using the database so that it is saved each tablespace, he will use deferred rollback segments?
2. placing the tablespace in backup mode is the same as read-only mode, on a technical level. So that it can read the blocks and changes made by the user can be moved to deferred rollback segments and later applied to tablespace, when it is the backup of the END?
3.AFAIK, will be created only to deferred rollback segments in the SYSTEM tablespace. So we need to keep an eye on the growth of the tablesace SYSTEM while the database/tablespace is backed by this method?
4. when the tablespace is put out of backup by using the backup of the END , will be that it applied by the deferred rollback segments?
5. where oracle will place deferred rollback segments, when tablesapce SYSTEM itself is implemented backup START ?
6. DON'T face us any kind of failures during all backup /END START as full tablespace etc SYSTEM.
Your answers will really helpful.
Thank you
Uday
Here I have a question about segments of rollback backup and deferred users managed, I don't have much experience with the user managed backups taken by backup of BEGIN and END.
1. how facilities oracle using the database so that it is saved each tablespace, he will use deferred rollback segments?
In what context you mention the use of rollback differed with the backup segments maintained by users?
2. placing the tablespace in backup mode is the same as read-only mode, on a technical level. So that it can read the blocks and changes made by the user can be moved to deferred rollback segments and later applied to tablespace, when it is the backup of the END?
Do you mean to say that when the tablespace is backed up, it is not accessible to the DML? If so, this is a wrong concept. Oracle did not go for the rollback segment (which I do not know how you are linking anways), but maintains the writing the image in full blocks for the first time in the log files of recovery following the normal writing changed buffers.
3.AFAIK, will be created only to deferred rollback segments in the SYSTEM tablespace. So we need to keep an eye on the growth of the tablesace SYSTEM while the database/tablespace is backed by this method?
Response above asked about segment deferred cancellation and their relationship, according to you, with the backup tablespace?
4. when the tablespace is put out of backup by using the backup of the END , will be that it applied by the deferred rollback segments?
5. where oracle will place deferred rollback segments, when tablesapce SYSTEM itself is implemented backup START ?
6. DON'T face us any kind of failures during all backup /END START as full tablespace etc SYSTEM.
Seems that you don't really have an idea how the backups managed by users actually work. I'll suggest that you read about it first in the backup and restore documentation before entering in any event.
HTH
Aman...
-
Hello
I have following question
User Managed Backup
(1) when I take backup of managed user I want to know if the DDL operation is allowed or not
(2) when I take managed backup user I want to know if we HAVE ADD/REMOVE of TABLESPACE?
RMAN backup
(1) when I take backup RMAN, I want to know if the DDL operation is allowed or not
(2) when I take Rman backup I want to know if we HAVE ADD/REMOVE of TABLESPACE?
ConcerningYES
YES
YES
YES -
The User Manager window problem
Hello
I am ti connected TestStand as administrator, but the 'User Manager' window is prepared I can't acess.
Can you help me please
TestStand 13.0
-
The user managed based backup Rman backup cold cold vs
Hi all
I just want to know the advantages and disadvantages for backup managed user cold and cold backup Rman.
What is the best cold backup?
Some some can help me?
Thank you
Cedric Joshi
Hello
Both are good only... If you took the clod backup (managed by the user), you can also do with RMAN catalog.
I feel clod RMAN backup is good.
Reason:
======
++ with RMAN you can avoid used used block, you can only backup used blocks
++ RMAN has its own compression algorithm
++ We also have the ability to assign multiple channels to parallelize the backup
-
The user managed the issue of recovery
Hi all
While doing refresh it by using the backup hot, recreate us the controlfile and cancel the recovery of the base (base to recover using backup controlfile until cancel). How oracle suggests the next archiving log.
I mean we have recreated the controlfile right?
It can suggest change (SNA), which is the required form datafile headers. But how is it that it gives the necessary exact archivelog.
The CCR, for the second case, it gives just the necessary change.
Someone help me please understand this.
Enter the user name: / as sysdba
Connected to:
Oracle Database 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production
With the partitioning, Real Application Clusters, OLAP, data mining
and Real Application Testing optionsSQL > restore database using backup controlfile until cancel;
ORA-00279: change 12913047615299 September at 08/12/2013 09:08:08 to
thread 1
ORA-00289: suggestion:
/U23/backup/archive/abctest/redolog_1_5052_814521583.arc
ORA-00280: change 12913047615299 thread 1 is in sequence #5052> But how is it that it gives the necessary exact archivelog.
LOG_ARCHIVE_DEST parameters / LOG_ARCHIVE_FORMAT and LOG_ARCHIVE_DEST_n. He used to 'build' the expected file name.
In the CCR, he needs a starting point for the first file Archivelog must be provided by the ADMINISTRATOR. Subsequent archivelog filenames are self-built.
Hemant K Collette
-
Cisco SRP527w cannot find the user management tab
Hello
Can someone help me? I just bought a new Cisco SRP527w and I'm all new to this type of material. I can't find the tab for user management that I'm changing the default password.
Also, I can't access the internet. My rj45 of the ADSL modem is connected to the WAN/LAN port with parameters IP static. What missed here? your help is very appreciated.
Hi Ronald, if you are clicking on all other tabs and it still seems only the setup of the wizard, you must change your internet browser. Try Firefox or IE. This should solve that.
-Tom
Please evaluate the useful messages -
OIM 11 g - authorization of the user management policy questions
Hello
(1) created a body-> human resources
(2) created a role-> HR_Admins
(3) assigned HR_Admins roles as the administrative role of human resources
(4) user1 created with the Organization as a role of human resources & HR_Admins assigned to this user.
(5) permission policy created for the management of users with the following selections
-> Create user authorization.
Constraints of data-> Selected "Users who are members of certain organizations" & selected above human resources organization.
Transfer-> role of the HR_Admins.
now, when I log in User1 I am not able to see Administration tab where I can choose create user.
I'm working on this issue for a few days, but not able to find the solution & I missed some configurations?
Thank you
Rahul ShahHello Rahul,
I tried your scénarion... with clause below
1) founded an organization-> human resources
(2) created a role-> HR_Admins
(3) assigned HR_Admins roles as the administrative role of human resources
(4) user1 created with the Organization as a role of Human Resource & allocated HR_Admins to this user. : default role all users
(5) permission policy created for the management of users with the following selections
-> Create user authorization. :-* "Select ALL."
Constraints data-> Selected "Users who are members of certain organizations" & selected above human resources organization.
-> HR_Admins role assignment.Data constraints
Organization security setting hierarchy aware (include all children's organizations)Now I am able to see the user tab to create, and I can create user in resources human org only.
If it does not work for you. Just assign 'ADMINISTRATOR of REQUEST' in the AUTH POLICIES. The result of the test.
Also, what is your version of the IOM?
Test with updated as new role name, org, and user data.
-kuldeepPublished by: Kuldeep on May 22, 2012 04:19
-
prompt (Functions) are not displayed in the user management responsibility
Hello
EBS 12.0.3
I added the responsibility of user management with my user application it shows not all prompt (functions) that it is empty, while the sysadmin user's show.
Kindly answer me.
Thank youYou have assigned the role of "security administrator" for the user and see if that helps?
Thank you
Hussein -
IOM - different email to the User / Manager
Hi all
In IOM, I need to send emails that are different to the user and his Manager at the end of the process task. I tried assigning two notifications on the status of the task - C (complete) but its not not allowing me to do so because as mapping / the status of the task must be unique.
Please let me know how can I send different emails to the user and his manager.
Thank youUpon completion of your task in process, you can trigger two tasks (send a Mail to Manager, send a message to the user and join two task-specific templates) and trigger their answer your task in process Completed.
Attach tcComplete adapter for both tasks (send mail to the Director, send a message to the user) so that they are self done.
Thank you
Suren -
Change the User Manager api for the update
Hi all
I'm trying to change some attributes using the UserManager change call.
I get the exception below-
Caused by: oracle.iam.platform.kernel.ValidationFailedException: this attribute is not supported for the change of the bulk operation.
at oracle.iam.identity.usermgmt.impl.handlers.modify.ModifyUserValidationHandler.validate(ModifyUserValidationHandler.java:192)
at oracle.iam.platform.kernel.impl.OrchProcessData.validate(OrchProcessData.java:246)
at oracle.iam.platform.kernel.impl.OrchProcessData.runValidationEvents(OrchProcessData.java:190)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.validate(OrchestrationEngineImpl.java:728)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.process(OrchestrationEngineImpl.java:579)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:492)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:409)
to s
I am able to change using the same api string or text attributes, I get the above error only when I add an attribute of date format.
HM.put (CommonConstants.EMPLOYEESTATUS, "T");
HM.put (CommonConstants.EMPSTATUSDESC, CommonConstants.TERMINATED);
HM.put (CommonConstants.TERMINATIONDATE, new Date ((new java.util.Date () .getTime ()));
Employee status and type PEM desc are attributes of text and they have updated if I comment the termdate entry in the hash table.
Pls let me know.
Note: I checked to find and use in bulk for all the attributes that I spend in the hash table.
Thanks in advance.
~ THE VSN
Thank you J_IDM.
I just followed the same same approach before, but the real problem was after I did the editable attribute, there is actually an update of the User.xml.
Where the question.
I took mds export and manually updated.
~ THE VSN
-
Need to deny access to the file for the User Manager
Hello
I need be able to deny access to the file manager, as I don't want my client, deleting files. However, for some reason, I have to allow him access to what he should be able to download files via InContext Editor (he needs to link the pages to documents that are not on the server so he needs to download and do it, I have to grant access to the file manager). How can I get around this? I don't want to reupload the site whenever it deletes a file...
Unfortunately we can not do - file manager access to removal as well as download and at this stage that cannot be changed.
-
Re-install the Ultra Manager backup-16 G flash drive
long story short.
Had a problem with my new 16G flash and finished last week by having to redeem another. Kept asking me to format the drive when I tried to access it, it was after I got 12 GB of data on it.
So, got my new and immediately put in shape, why, cause, I didn't want the same problem. Well, I deleted the backup out of there Manager. Where can I download this nice piece of software?
Thanks in advance guys
Dennis
Oxford, AL
NM.
Here ya go for those who have the same problem:
http://KB.SanDisk.com/app/answers/detail/A_ID/5206/kW/SanDisk%20Back%20up/r_id/101834
-
How to recover a database after you add a data since the last file backup.
How to recover a database after you add a data file to a tablspace existing since the last user managed backup.
PS: I am aware that the user managed backups are not used and RMAN is used these days.At the stage of the mount: select name from v$ datafile;
The last entry indicates a file named /xxx/xxx/.../UNNAMEDXXX.dbfNow
ALTER database create datafile ' / xxx/xxx/.../UNNAMEDXXX.dbf' as 'path_where_you_want_to_add_the_datafile ';
The name of the data file must match the name that added in production
This will create a data file to the required location.
Once the file has been created, you can continue with recovery.
Maybe you are looking for
-
can not change the dns server, always comes back.
10.10.5 Yosemite My ISP has provided DNS servers are terrible and I still get messages "site is not reachable. I'd like to change the DNS from Google or Open DNS servers In SYSTEM preferences > network > DNS tab I delete 2 default entries & entry "8.
-
Satellite A205-S4617 - where can I download the XP drivers?
Hi all. I have a 2 years Satellite a205-S4617 I want to install XP on. Before wiping Vista if I'm trying to locate and download all the drivers, I need because I got caught out due to lack of drivers for laptop before. Problem is that Toshiba seems t
-
More information about the problem: BCCode: 116 BCP1: FFFFFA8003FC44E0 BCP2: FFFFF8800FFD2230 BCP3: 0000000000000000 BCP4: 0000000000000002 OS version: 6_1_7600 Service Pack: 0_0 Product: 768_1 Files helping to describe the problem: C:\Windows\Minidu
-
Problem of taskbar - reactivate Preview windows
original title: taskbar problem My option of taskbar 'Show windows preview (thumbnails)' is turned off how can I reactivate it. Thank you
-
Is there an agent that must be installed in the control of the physical host.