Instance - Redo and Undo recovery question
I'm a little confused about how to undo and redo used to restore, please help me to clarify this point. If redo records changes (validations and database changes to cancel the revenge), don't do it again and undo all come from the log to roll forward to instance recovery? What is the source of the undo data, do it again save or cancel the segments that have been rebuilt using recovery logs?Matt
In simple terms:
Source of redo - redo logs, source of cancellation - undo tablespace. Oracle applies again to the data files, including cancellations of TBS, first, then it restores the unvalidated data using TBS of cancellation.
Tags: Database
Similar Questions
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Hello
I have an application that uses oracle 10 g 2. This is on Linux x84_64.
I want to know "the amount of ' redo and undo logs the application generates.
Can you please tell me on how to do this?
Is there a way where I can tell that the log redo and undo log until the application started x and after the application finished the redo and undo is now 'y '?
-KissQuery v$ mystat would show only for your current session. Once you disconnect and connect again, the session id is different. Also, of course, it does not display data for other sessions.
If you want statistics database instance level, you should be questioning for "size" in v$ sysstat. This view shows the statistics accumulated since the restart of the database instance. To identify the differential redo generated within a specified period, you will need to take snapshots of size "remake" at the beginning and at the end of the fixed period. If you use StatsPack or AWR (which requires the License Pack diagnosis), the reports generated by these packages also see again you generated during a period (for specified snapshots).
Information on the cancellation rate is available from v$ undostat.
Hemant K Collette
http://hemantoracledba.blogspot.com -
relationship between redo log buffer, journal of redo and undo tablespace files
What is the relationship between the redo log buffer, redo log files and undo tablespace?
what I understand is
redo log buffer is the logical area where all the news of recovery were stored until they are transferred by LGWR bank roll forward log online... but y at - it report any with the undo tablespace with these two?
Please correct me if I'm wrong
Thanks in advanceredo log buffer is the logical area where all the news of recovery were stored until they are transferred by LGWR bank roll forward log online... but y at - it report any with cancellations
tablespace with these two?
There is a link between files redo log and buffer, but the undo tablespace is something else entirely.
spend it here with this links
REDO LOG FILES
http://www.DBA-Oracle.com/concepts/redo_log_files.htmBUFFER REDOLOG
http://www.DBA-Oracle.com/concepts/redo_log_buffer_concepts.htmUNDO TABLESPACE
Undo tablespace to cancel files to undo or roll back uncommitted changes pray the database.Hope you understood.
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Satellite A300 - and Vista recovery Question
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To do this I advise you to use high quality in DVD-R format media. My favorite is TDK or Verbatim.
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BIOS and system recovery question
If we do a system recovery, bios back to an earlier version if it is updated after the date of recovery?
N °
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Repeat and undo operations in the jargon.
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You must back up the positions of sprites in a list for this.
Ex: my_sprite1_position_H =
my_sprite1_position_V =
Then, you set the loch and locV of your sprites when you need:
example, if you go back to section 2:
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Sprite (1) .locV = my_sprite1_position_V [2]
Brahim
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Backup and HP Recovery Manager General Questions
I made a series of restore DVD using backup and HP Recovery Manager hear are several questions I have.
If the restore on my hard drive partition is deleted can always restore from the DVD I made?
I am upgrading to Windows 7 will soon be the Recovery Manager always be available for use?
Thanks, Rich614
richie614 wrote:
I made a series of restore DVD using backup and HP Recovery Manager hear are several questions I have.
If the restore on my hard drive partition is deleted can always restore from the DVD I made?
I am upgrading to Windows 7 will soon be the Recovery Manager always be available for use?
Thanks, Rich614
Rich, Yes, the DVD can take the place of the partition. However, I would test to ensure that they work properly before you delete the partition of the DVD.
Yes, however, it will restore your computer to its original state. This means that you will no longer Win 7, but programs and original OS.
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I don't remember my password or security questions, and email recovery is an old, that I no longer use. What can I do?
You will need to contact support in the country where you are (and therefore the country on your account) for questions (and the password) reset: Contact Apple for the Apple ID account security support
If your country is not on this page, then try this form to contact Support: https://www.apple.com/emea/support/itunes/contact.html
When they have been reset you can then update your email address of relief for possible future use: on your Apple ID - Apple Support email addresses
Or if it is available in your country, you can substitute 2-step verification: frequently asked questions about two-step for Apple ID verification
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I forgot my security question answer Apple ID and my recovery email address has since been deleted and disabled. How to get answers to security questions and or change my email recovery?
Go to https://getsupport.apple.com . Click on "see all of the products and services ', then 'More', then 'Apple ID', then 'other Apple ID subjects' then 'security issues forgotten Apple ID". If you have problems with this test of this form: https://www.apple.com/emea/support/itunes/contact.html
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Updated SL500 and OS recovery Media (s)
Hello world
This is my first purchase of laptop and I did some research as to what long I must/need to do before messing with the system.
Please bear with me as I have a few general questions and the search function track me not enough for all the responses.
My OS is Vista Home Basic.
At startup, I typed recovery leading to "Create recovery media", "Create product recovery media" and "rescue and recovery".
I made backups of these three programs.
To "Create the product recovery media", it has created 3-disc Start recovery disc i) and ii) product Recovery Disc 1 and 2
For "Create recovery media", it created i) recovery and rescue boot disk
Now, after you create the recovery of two types, it is safe to assume that I can delete the Q: Partition.
Here are some questions that puzzled me:
1. What is the difference between the product recovery media and the recovery media?
If I can answer my own question, product recovery media restore the laptop to its factory as well as the 3 partitions EVEN AFTER State I've done a 'clean install' of Vista and removing all partitions. Someone correct me if I'm wrong.
I have no idea what a recovery media as product recovery media seems to do everything.
2. what type of recovery (of the two mentioned above) is the operating system Vista pre installed inside I should decide to go back to Vista.
My guess is the product with its OS and Lenovo recovery media drivers + utilities.
3. should I decide to go and install W7 Pro, once versions or Lenovo official drivers (because I can not directly upgrade Home Basic to Pro), is possible to always use the product and revert to Vista Home Basic recovery media, assuming that what came as factory settings have all been removed.
4. and finally, I'll be able to make any kind of recovery media after a fresh install of W7? (I think a definitive answer will arise come W7 launch date, but it does not hurt to ask )
Thank you very much for reading a long and perhaps repetitive for some, post.
I always visit the forums then I hope I'll learn new things through time.
1. recovery of product support will include your ad OS drivers that get you with your system
2 medial recovery allows you to enter in the rescue and recovery environment
You can use the product recvoery support to return to Vista Home Basic, if you want to
You cannot do any recovery media after installing windows 7, because that has not been delivered with your system
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Statrted of Vista in safe mode and systm recovery restores and no recoverydisk not found?
Statrted of Vista in safe mode and systm recovery restores and no recoverydisk not found? Sys restore is off and will not turn on and due to safemode noting els / programs will not work. is there a way out?
Hi Jeff,
1. you receive messages or error codes?
2. did you of recent changes on the system?
If you are able to boot into safe mode without any problem, you can try to perform a clean boot and check if it helps.
Method 1:
A clean boot to check if startup item or services to third-party application is causing this issue.
You can read the following article to put the computer in a clean boot:
How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
Note: After troubleshooting, be sure to set the computer to start as usual as mentioned in step 7 in the above article.
Method 2:
If you are always faced with the question, then you can check if you can start your computer by using the known last good Configuration feature and fix the problem.
You can read the following article to do the same thing:
Using the last good known Configuration
Method 3:
If the steps above fail, then you must have a full version of Windows Vista disk and try to perform a repair of the boot to WinRE (Windows Recovery Environment) boot from the installation disc.
If restarting fails, then try to perform a restore of the system to WinRE (Windows Recovery Environment).
For more information, you can consult the following article:
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Identifying BitLocker password and PIN recovery does not tally in AD DS
The PC is connected to a domain, Bitlocker is on but the ID password and PIN recovery isn't tally to AD DS services, why is it so?
Hi ahNAh,
Since you have questions about Bitlocker on domain PC, it would be better suited in the Technet Windows forum. Please post your question in the following Windows Vista TechNet forum to improve assistance:
http://social.technet.Microsoft.com/forums/en-us/category/windowsvistaitpro
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I'm recovering Pavilion dm4-3170se of my daughter. My daughter did not a recovery disk and has no recent backup of its set of data files.
Problems (and what I've done so far) are quite parallels to what the user indicated in this post incredibly detailed:
Difference is in start-up Mode (command line or not) safe, Windows startup fails on a dll, specifically CryptUI.DLL.
Although incredibly detailed post user is not getting into the Windows startup, I have mod... for about 30 dll before it chokes on the corrupt. I tried a number of other things to get passed without result.
Game drive recovery of origin of my daughter bought the farm when his house burned down. So I ordered and received a replacement of HP. I am reluctant to use before retrieving his data files because it may lose 40% of its professional activity.
The set of recovery disks delivered includes an "Application and Driver Recovery DVD". Account of > 20 years Wintel machine tradition, I presume it is bootable. Surprisingly, user detailed Post got hers to start from the DVD drive. But the configuration of the BIOS to get the DVD drive as the first choice of startup is not to begin after two trials.
Before I pour more time into that, I want to the Collective Wisdom here.
Q1: Is this disc HP, numbered 691822-B22, meant to be bootable?
Q2A: If it is, imagine you I can use the command line interface to copy the DLL identified-as-bad to the HD?
Q2B: If she isn't, why the, uh, gollygoshdarn isn't? Must be a reasonable thing...
Thanks for all the ideas based on experience.
Hello:
No matter what DVD driver and HP application I have ever used is not bootable.
It should autorun from the windows desktop once windows has been reinstalled.
This is the only question that I can answer those you requested.
Suggestion...
Make your own installation of W7 ISO from the link below.
Use to install W7 and do not delete all partitions or format the drive.
Windows install and create a folder Windows.old to the current operating system.
Then, you can copy all the files you need from the Windows.old folder after installing W7.
Once you are sure that you have got what you need, use the recovery disk set to restore the hard drive on his out of the box state.
Link to files ISO of W7 is below. Use the W7 x 64 home premium from the SP1 media list file refresh.
Then use this tool to transfer the iso file on a flash USB DVD or 4 GB drive. The tool also performs the file iso bootable.
http://www.microsoftstore.com/store/msusa/HTML/pbPage.Help_Win7_usbdvd_dwnTool
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Difference between tax and account recovery/tax liability?
What is the difference between taxes and tax recovery/liability account when you set up VAT in ebTax?
Normally I have to implement only VAT. Can I configure the account recovery/tax liability with the same tax expenditure account?
Please see question 23 to the notes 735970.1, Frequently Asked Questions - Oracle accounts payable and EBTax of installation.
The tax liability account will only if the tax is declared. If the tax is that self evaluate, then given that tax is payable separately for tax administration should be accounted separately the responsibility and the entry would be:
Expenditure a/c Dr (article account) 100
Tax expenses a/c Dr. (point VAC or tax costs VAC) 16
For, the account provider (combination of account provider code) 100
To, tax liability (combination of passive tax code account) 16
Cheryl
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Archived newspapers and Flash recovery
Hello
in 10g R2, what is the relationship between archived newspapers and Flash recovery?
I have logs archived here:
P:\oracle\product\10.2.0\flash_recovery_area\MYDB\ARCHIVELOG\2008_11_02
And also here:
D:\base\MYDB\arch
Are both the Sami? What is the difference? We need both of them?
Here are my settings:
Thanks before.SQL> archive log list Database log mode Archive Mode Automatic archival Enabled Archive destination USE_DB_RECOVERY_FILE_DEST Oldest online log sequence 297 Next log sequence to archive 299 Current log sequence 299 SQL> show parameter log_archive_dest_1 NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ log_archive_dest_1 string LOCATION=D:\base\MYDB\arch OPTIONAL REOPEN=300 log_archive_dest_10 string LOCATION=USE_DB_RECOVERY_FILE_ DEST OPTIONAL REOPEN=300
Newspaper Archives are written in several places because of parameter settings. However, if you look at the value, OPTIONAL string indicates that the archiving of these places is not mandatory. If the archiver is unable to create an archive to any of these places, instance always works without any problem.
It is absolutely mandatory that the archiver must be able to create an archive in one of the locations (if there is not both).
What is the value to LOG_ARCHIVE_MIN_SUCCEED_DEST (default is 1)?
If you do not need two of them, you can stop archiving to a specific location with ALTER SYSTEM.
http://download.Oracle.com/docs/CD/B19306_01/server.102/b14237/initparams100.htm#I1010086
Published by: Sissi Kandi on November 2, 2008 21:38
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