Oracle concepts: Clarity needed on the recovery Instance

Similar Questions

• Oracle concepts: Clarity on the control points required

  First of all, I should mention my understanding, and then I'll raise my doubts/queries:
  
  I think I know just enough of what are the points of control and their purpose; in order to validate and to have a deeper understanding, I was going through section "Importance of control points for example recovery ' chapter 'Instance of Oracle database' of ' 11 g Release 2 Oracle® database Concepts'.»
  -Oracle link Docs
  http://docs.Oracle.com/CD/E11882_01/server.112/e25789/startup.htm
  
  Now I need some clarification on the mentioned content there.
  
  I knew that control points are used to ensure that the control file and data files are synchronized and and it is a point where recovery instance is required, doc Oracle he mentions as a control point position.
  
  First question:
  I see many types of checkpoints mentioned here as put on checkpoints, Tablespace and data files checkpoints and additional checkpoints, I tried to get that said, can anyone make it a little clearer to me in simple terms?
  
  Second question:
  In the Oracle RAC environment, there are several threads to redo (one for each instance), how recovery Instance that happens? It is not clear to me, I want to say how serialization between multiple threads to roll forward to retrieve one or more has no instances?
  
  Kind regards
  Ankit Rouault

  NVO wrote:

  First question:
  I see that many types of checkpoints mentioned here as put on checkpoints, Tablespace and control points data files & additional checkpoints, I tried to get that said, can anyone make it a little clearer to me in simple terms?

  The term "checkpoint" has changed meaning over time. The original meaning was close to your description - a control point has allowed Oracle to determine that all blocks of data changed before a specific point in time (SNA) was written on the disc - however there are has reasons why Oracle might want to make sure that a specific blocks of data modified subset had been written on the disc and that's why the checkpoint term has expanded to cover the options such as a checkpoint of tablespace, or a checkpoint of object reuse. For example - if you truncate an object, then Oracle must copy everything puts in buffer for just that object on the disk before making the data dictionary and the space of management changes which perform the truncate (where the control point"reuse of objects '").

  Second question:
  In the Oracle RAC environment, there are several threads to redo (one for each instance), how recovery Instance that happens? It is not clear to me, I want to say how serialization between multiple threads to roll forward to retrieve one or more has no instances?

  All active instances in a RAC system will be constantly chatting to each other on the network and via the control lead - as soon as any instance think of another instance has failed, it will try to acquire exclusive global "recovery lock" - on the top of my head, I think it's the lock of the IR. When he arrives this lock, all other cases knows that there is a body controlling a recovery. Indeed the instance that got the blocking takes on the identity of the instance failed to recover through its newspapers online redo - obviously the process are much more complex than that, but it's probably a good starting point for an answer to your question.

  Concerning
  Jonathan Lewis

• How can I recover my windows vista serial, the tile is broken and im missing a few numbers... __i lost my toshiba recovery CD, it is an a135/s4677, I reinstalled vista, but in the first instance. I am already taking pictures of the sticker and serial No.

  How can I recover my windows vista serial, the tile is broken and im missing some numbers...
  I lost my toshiba recovery CD, it is an a135/s4677, I reinstalled vista, but in the first instance. I am already taking pictures of the sticker and serial No. my laptop if you need if you can help me please write me * address email is removed from the privacy * thank you

  If you had not reinstalled Vista, we helped you recover the product key of Vista for running old, Vista activated using specific programs.

  But, as you have wiped the hard and reinstall Vista, we will not help you recover the product key.

  http://www.CSD.Toshiba.com/cgi-bin/TAIS/support/JSP/home.jsp

  Contact your computer manufacturer and ask them to send a recovery disk/s Vista set.

  Normally, they do this for a cost of $ small.

  Using recovery disks is normally not need to insert a product key.

  See you soon. Mick Murphy - Microsoft partner

• Need help with the final step of the recovery process

  Oracle Linux 4.7, Oracle 10 g 2 10.2.0.1
  
  I got plenty of RMAN backup of the database at a time, including file control registry and archives. Now I'm trying recover the database from the same backup.
  
  Because I'm trying to simulate the loss of all data files, control file, redo log... I'm going in (good) last pfile nomount mode database restore you spfile and controlfile.
  
  SQL & gt; startup nomount pfile='/usr/oracle/10gr2/dbs/pfile.ora';
  
  ORACLE instance started.
  
  Total System Global Area 2147483648 bytes
  Bytes of size 1220432 fixed
  838860976 variable size bytes
  1291845632 of database buffers bytes
  Redo buffers 15556608 bytes
  
  
  ... no problem here.
  
  
  
  
  switch to RMAN and restore spfile and controlfile...
  
  SQL & gt;! target rman / nocatalog;
  
  RMAN & gt; restoring automatic backup SPFile;
  From restoration to 16 February 09
  allocated channel: ORA_DISK_1
  channel ORA_DISK_1: sid = 155 devtype = DISK
  
  field of recovery destination: / u02/flash_recovery
  name of database (or unique name of database) used for research: MSF
  channel ORA_DISK_1: autobackup found in the recovery area
  channel ORA_DISK_1: autobackup found: /u02/flash_recovery/MSF/autobackup/2009_02_13/o1_mf_s_678729040_4sd1tjdp_.bkp
  channel ORA_DISK_1: restore SPFILE full automatic backup
  Finished restore at 16 February 09
  
  RMAN & gt; Restore automatic backup controlfile;
  From restoration to 16 February 09
  using channel ORA_DISK_1
  
  field of recovery destination: / u02/flash_recovery
  name of database (or unique name of database) used for research: MSF
  channel ORA_DISK_1: autobackup found in the recovery area
  channel ORA_DISK_1: autobackup found: /u02/flash_recovery/MSF/autobackup/2009_02_13/o1_mf_s_678729040_4sd1tjdp_.bkp
  channel ORA_DISK_1: restore full automatic backup of control file
  output filename=/oracle/oradata/MSF/control01.ctl
  output filename=/u02/control_files/MSF/control02.ctl
  output filename=/u03/oradata/MSF/control03.ctl
  Finished restore at 16 February 09
  
  
  
  
  ... well!
  
  I stopped at this point database and rebooted, but this time used my resotored spfile.
  
  SQL & gt; stop immediately;
  SQL & gt; bootable media;
  
  ... and then restored data files
  
  RMAN & gt; restore the database;
  
  From restoration to 16 February 09
  From backup duplication implicit 16 February 09
  allocated channel: ORA_DISK_1
  channel ORA_DISK_1: sid = 155 devtype = DISK
  Cut 6 objects
  Implicit overlapping backup finished at 16 February 09
  
  Starting copy of implicit intersection to 16 February 09
  using channel ORA_DISK_1
  Copy of implicit crossover finished at 16 February 09
  
  the search for all files in the recovery area
  cataloging files...
  cataloging done
  
  List of cataloged files
  =======================
  File name: /u02/flash_recovery/MSF/autobackup/2009_02_13/o1_mf_s_678729040_4sd1tjdp_.bkp
  
  using channel ORA_DISK_1
  
  channel ORA_DISK_1: from datafile backupset restoration
  channel ORA_DISK_1: specifying datafile (s) to restore from backup set
  restoring datafile 00001 to /u03/oradata/MSF/system01.dbf
  restoring datafile 00002 to /u03/oradata/MSF/undotbs01.dbf
  restoring datafile 00003 to /u03/oradata/MSF/sysaux01.dbf
  restoring datafile 00004 in /u03/oradata/MSF/users01.dbf
  restoring datafile 00005 to /u03/oradata/MSF/example01.dbf
  restoring datafile to /u03/oradata/MSF/users02.dbf 00006
  channel ORA_DISK_1: backup /u02/flash_recovery/MSF/backupset/2009_02_13/o1_mf_nnndf_WEEKLY_FULL_4sczgjj9_.bkp piece reading
  channel ORA_DISK_1: restored the backup part 1
  piece handle=/u02/flash_recovery/MSF/backupset/2009_02_13/o1_mf_nnndf_WEEKLY_FULL_4sczgjj9_.bkp tag = WEEKLY_FULL
  channel ORA_DISK_1: restore complete, duration: 00:25:06
  Finished restore at 16 February 09
  
  
  WHAT IS NOW?
  
  How to restore to the last SNA possible?

  Why do you want the collection incomplete ot

  Just do a full restore using the last restored database

  RMAN>recover database
  

  database recover until cancel going to sql not to RMAN

  for the incomplete recovery compared to the time

  RMAN> run
   {
   set until time "to_date('13-05-2008 16:09:26','DD-MM-YYYY HH24:MI:SS')";
   recover database;
   }
  

  with regard to the SNA

  RMAN> recover database until scn 3;
  

  with regard to the sequence of journal

  RMAN> recover database until logseq 3
  

  Khurram

• RMAN - 06004:ORACLE error in the recovery catalog. ORA-00904: invalid...

  Hello all,.
  
  One of our backups RMAN fails with the following error message. Any suggestions would be greatly appreciated.
  
  ==================================================================================================
  
  From backup 2008-12-30 22:03:47
  using channel ORA_DISK_1
  RMAN-00571: ===========================================================
  RMAN-00569: = ERROR MESSAGE STACK FOLLOWS =.
  RMAN-00571: ===========================================================
  RMAN-03002: failure of the backup command to 2008-12-30 22:03:47
  RMAN-06004: the recovery catalog database ORACLE error: ORA-00904: invalid identifier
  
  RMAN >
  RMAN > #BACKUP # ARCHIVELOG delete all '% d_bkp_al_ % t_Set % s_Piece %p' entry FORMAT;
  2 >
  3 > # DELETE ARCHIVELOG until ' SYSDATE-7 ";
  4 >
  5 > # check if the database can be restored
  6 > RESTORE DATABASE # VALIDATE;
  7 >
  8 > # check if controlfile can be restored
  9 > #RESTORE # CONTROLFILE to ' / backups/admin/custpr/custpr_bkp_cntlfile.ctl' VALIDATE;
  10 >
  11 > # check if archivelogs for these past two weeks can be restored
  12 > # RESTORE ARCHIVELOG FROM TIME ' SYSDATE-7' VALIDATE ';
  13 >
  14 > #-check all backups on backup media are intact
  15 > # CROSSCHECK BACKUP OF DATABASE;
  16 >
  17 > #-display based on a list of files that need to be stored on the retention
  18 > policy #. For this case study, the files that do not have at least 1 backups
  19 > # will be reported.
  20 > REPORT NEED backup.
  RMAN retention policy apply to the order
  RMAN retention policy is set to 7 days recovery window
  Report of the files whose recovery needs more 7 days of archived newspapers
  Days of files name
  ---- ----- -----------------------------------------------------
  RMAN-00571: ===========================================================
  RMAN-00569: = ERROR MESSAGE STACK FOLLOWS =.
  RMAN-00571: ===========================================================
  RMAN-03002: failure of command report at 2008-12-30 22:03:48
  RMAN-06004: the recovery catalog database ORACLE error: ORA-00904: invalid identifier
  
  RMAN >
  RMAN > #-remove unnecessary backups. This command deletes the backups based on the
  2 > retention policy of #.
  3 > # commented DELETE OBSOLETE - TSM not configured to remove on 68
  4 > #DELETE # OBSOLETE;
  5 >
  6 > #-complete list of the existing backups
  7 > LIST BACKUP;
  RMAN-00571: ===========================================================
  RMAN-00569: = ERROR MESSAGE STACK FOLLOWS =.
  RMAN-00571: ===========================================================
  RMAN-03002: failure of the list command at 2008-12-30 22:03:49
  RMAN-06004: the recovery catalog database ORACLE error: ORA-00904: invalid identifier
  
  RMAN >
  RMAN > # end of file.
  2 > * end-of-file *.
  
  RMAN >
  
  Published by: ORA_UMAIR on December 31, 2008 07:51

  No help is possible.
  You publish a file of newspaper only, and can not see the command that failed.
  Also you include, contrary to the recommendation in the post on Forums label, the complete version number of 4-digit.
  This is important because they either has an error in your script that does not find RMAN or you hit a bug.

  -----
  Sybrand Bakker
  Senior Oracle DBA

• Can someone help me understand the process Instance recovery

  First thanks for all of you who responded to my post, any help is really appreciated.
  
  I would like to more deeply understand the Instance recovery process then the Administration Guide of Oracle Docs can tell me.
  
  What I have so far of Instance recovery is:
  
  1 oracle determines which files are not synchronized.
  2. all data from redo log files is applied to restore log buffers by progression. Buffers do not participate on the database of normal transactions because they are marked to pick it up.
  All these data are applied to the data files (commited and contains transactions).
  This step is called roll forward.
  3 cancellation are used to restore transaction no. After this step the datafiles not aura no data contains on them. At this point, the instance is available for users, but the blocks used are not.
  4. all files are now in sync.
  
  My questions are:
  
  -Step 1, what process determines which files are not sync? Make the bed of Smon the controlfile and data file headers and then make a list which is not sync?
  
  -L' step 2, what is the process that reads the information in the redo log files and complete the recovery log buffer? What is the CKPT? And how he is warned that he might start to read the files after completing step 1? There is a semaphore that is defined for it?
  
  -Step 2, which process applies information engaged and contains buffer redo log for the data files? When it starts to apply this information of the instance is already partially available to users?
  
  -Step 3, what is the process that reads up to cancel to restore transactions not? This process must be done once step 2 is complete as could be blocks of the undo tablespace on buffers of the right-wing newspaper do it again? And when this step 3 starts, the process is triggered by an another semaphore?
  
  -When step 3 is finished, what process changes the State of the database of partially open to open, or that's just what we call it when the database has always revenge marked for recovery?
  
  Thanks again in advance for the help, there are reasons not practice known this information, I'm just a curious person who could not find this information on the google...
  
  
  Ricardo Rodriguez

  Ricardo,
  Well, I'll take a chance to respond.
  (1) SMON in the start-up phase, in the strict sense in the editing phase, compares the SNA stored in the control file with the data file headers. This sCN is called checkpoint SCN. It is always higher among the controlfile so its part of the same database and is not set up to an old backup. By this correspondence, Oralce comes to know that there are some report files with their SNA control point is only not with the controlfile and consequently, instance recovery is reported. Here is the list of files is prepared.
  (2) the same process SMON only would trigger playback of the redo log files and launch the Rollforward process. Roll forward is made from the last address bytes redo controlled at the end of the restore log forward. This means that the last block, blocks have not reported in the data file are simply read and are dumped on the data files. As a result, we get a situation that the data file will end up with a lot of data committed but also committed that redo is containing both.
  CKPT process will not come in the picture I think. Where did you read what CKPT would do all this?
  (3) SMON governs all this thing is to say the application of the data for the data files. No, in this phase, we are still in the phase of mounting that this recovery is called crash recovery. Oracle wouldn't let users to use the database at this point. Data is still not available for them.
  (4) do not bring semaphores here. They are already in use when you allocated the memory of your instnace. Its work process level. After the mount phase is completed, oracle would open up the db. At this stage, "the transaction recovery" aka rear roller phase. That would be launched to relax all the operations that are not validated.
  Now to do this, undo will be used. Oracle launches this phase into two or more strictly speaking 3 ways. One, SMON would just check how many blocks will be there for the recovery. If they are larger, it would begin the rear roller with parallel slaves. This is called "we demand" rollback. It is initiated by the user. So if you were using the EMP table data and the server crashed between, now the next time you start, if you try to access the same blocks once again, they are set aside on the basis of priority.
  The third one will rollback transaction intra. It's basically splitting the work among the slaves so that if a slave is sitting free, it can share the work and can move forward to make things more quickly restored.
  Please note that all this is happening at the open stage. This means then that this is the case, oracle is available for users. And second, there is little change in this process (an integer) 9i go. This is called two-pass recovery which has been made to make this process a little faster. In this regard, SMON ignores these blocks that are controlled by DBWR during execution of the phase of rollforward.
  Hope this makes some sense and helps. Let me know if there is something wrong or unclear.
  HTH
  Aman...

• HP Notebook 15z-af000 ABA: need the recovery disc

  How to find where to order my system recovery disks for my laptop HP 15z-af000 ABA [content deleted]

  "The unreal is more powerful than the real. Because nothing is as perfect as you can imagine. Because its only intangible ideas, concepts, beliefs, fantasies of the latter. Stone crumbles. Wood rot. People, well, they die. But the fragile things like a thought, a dream, a legend, they can go on and on. »
  
  

  @ZoeD

  http://support.HP.com/us-en/mediaorder/HP-15-af000-notebook-PC-series/7771410/model/8341291/softwareitem/823224-002/STEP1

  REO

• Need help with the recovery of the System Satellite L300-149

  Hello

  We have a Satellite L300-149.
  Was running really slowly then wanted to reset it to factory settings.

  Doesn't the "press F12 during startup, insert the disk in" etc etc BUT have a horrible feeling that I put a disc to which belonged in fact to a different Toshiba, we used to use a U300.
  'Give' was that the manual for the U300 is now on the desktop on the Satellite :-/

  I hope that this would not be a major problem BUT the F8 key is gone now it's impossible to connect to the internet.

  I looked online and read that the L300 sometimes doesn't come with a disc that the info is kept on a separate part of the disk hard hope so I could reset it back to settings to factory again but when I click on F2 on start up and go to the option to restore it, noting happens.

  Can someone please help?

  Hello

  Forget HARD drive recovery now
  You have recovered the system using another disc and it has been removed and the HARD recovery disk image files. If this option is NOT possible!

  You reason that the L300 and all other laptop does not come with recovery discs.
  The recovery disk must be created using the recovery disk Creator called preinstalled software. But it is also NOT possible because you deleted the preinstalled system and the files that are needed for this recovery disk are no longer available!

  But if everything is working properly except the WLan FN + F8 key, then I recommend you only install the Wlan driver. I think that the key does not work because the right WLan driver is not installed.

  I think that the Satellite L300-149 supports the smart WiFi Realtek RTL8187B.
  Then install the right driver Wlan you can find here:
  http://APS.toshiba-tro.de/WLAN/?page=downloads

• My wife has an i5 to 2.3 GHz MacBook Pro early 2011 and it worked like a slug.  Ran disk utility and verified that the disk needs repair using recovery HD.  What does this lead and what is the risk of losing all the data is there?

  My wife has an i5 to 2.3 GHz MacBook Pro early 2011 and it worked like a slug.  Ran disk utility and verified that the disk needs repair using recovery HD.  What does this lead and what is the risk of losing all the data is there?

  Even if it is very slow, you must make a return upwards before the race "repair disk". The risk of data loss is minimal, but do it anyway: Save and run to repair the disk.

  As for what it implies - most of the time nothing more than simply sitting and waiting to do his thing.

• Satellite A300-1MC, does not need the recovery cd

  Hi all.

  My friend has a laptop Satellite A300-1MC that no longer works. When the laptop is on, it indicates that the hal file is missing. I know that we need to buy the recovery cd, since she did not have one when she bought the laptop.

  Can someone direct me to the Toshiba site, where you can buy these recovery CD since then?

  If not, can someone give me the phone number of support Toshiba UK.

  Thanks in advance.

  Hello

  Recovery media can be ordered under https://backupmedia.toshiba.eu/landing.aspx
  Toshiba UK support phone number is unknown to me, but maybe you can find it under http://uk.computers.toshiba-europe.com/innovation/home/

  By the way: why you need assistance? You have some serious problems?
  Let us know what kind of problems you have. Maybe someone here on this forum can help you.

• Satellite A200 - 20 c - need the recovery disc

  Hi you

  I top model satellite A200 - 20 c, serial number is 18232821K.

  I'm trying to find information on my lab top, but it has give me is the error, and this model, not found, could you tell me what the problem is and what I can do.

  2nd, I need to order Recovery DVD becose my cd is not ok and show me some file missing I don't know what the problem is. Tell me how to order the DVD and my laptop is supported for windows 7, tell me how bud from vista to win 7.

  Thank you

  Hey,.

  As far as I know for notebooks, it s not possible to order an online Toshiba Recovery disk.

  For older computers, you will need to order a disk at an authorized service provider. List of them which you can find here:
  http://EU.computers.Toshiba-Europe.com/innovation/generic/ASP_SUPPORT

  Good luck! :)

• Satellite L - need the recovery disc

  Hello

  I need help with my laptop. I need the recovery CD because I can't start up

  Hello

  May I ask what phone do you have?

  Normally you can order a new Toshiba Recovery disk here directly:
  https://backupmedia.Toshiba.EU/landing.aspx

  It according to your model of laptop but if you can access the advanced boot menu, you can use the HARD drive recovery feature:
  [How to recover a Toshiba notebook with the HDD recovery procedure? | http://forums.computers.toshiba-europe.com/forums/ann.jspa?annID=58]

• Info satellite A210 171 what do I need before using the recovery disk?

  Hello

  I have 1 recovery disk that came with my equium, have not used before.
  It says on the back of the envelope of recovery disk 'insert the first diskette.

  I guess there should be a second?

  Also this info I need to provide during the installation process? as serial number?
  All I have a black and white sticker that is on the side of the box, it came in, but it was so long ago.

  I'm having a lot of problems with windows install does not and many others.
  Windows updates do not work either and I tried to correct those, but a clean reinstall of the operating system has been recommended.
  Now, at this point nothing will install because windows setup will not work.
  So I think I wil lhave to try a clean install, but I do know that the cd player works.

  I got a great run on this laptop, little slow today for my needs, but all very good product, purchased in 2007.
  With a clean OS and 4 GB of ram that could last for years, cannot afford a new right now.
  I really tried to avoid using a disc of recovery in the past, as I have never had problems until now.

  Thank you

  Post edited by: sounds

  > I have 1 recovery disk that came with my equium, have not used before.
  > On the back of the envelope of recovery disk, it says 'insert the first diskette.
  > I guess there should be a second?

  I m wondering why you get this disc with your laptop, why? Because I do not have the recovery disk, but I had to create one using the Toshiba recovery disc creator software
  But my laptop is more recent that your A210 might be the reason why you have this drive

  I have created a recovery disk and I needed two-disc DVD, I think it depends on the size of the image file

  > Also what information I need to provide during the installation process? as serial number?
  This is not necessary because your system has already been activated.

  But I recommend you backup your personal data, because the recovery disk would format the whole HARD drive and you will lose the files.

  PS: you should read other threads in product recovery forum!

• Satellite 2180CDT: need new battery and the recovery CD

  I have a Satellite 2180CDT of second hand and the battery seems to be entered at the end of his life and is not holding a charge. Also, I don't have the laptop recovery disks.

  I was wondering if anyone had a good battery or recovery discs that they no longer need or tell me where I can get these?

  Hi Malcolm,

  Tyr, the following link for a battery to the laptop you: _
  http://www.studentcomputers.co.UK/laptop-battery/Toshiba-laptop-battery/Toshiba-Satellite-2180cdt-laptop-battery.htm

  You will need to contact a repairman authorized Toshiba to get the recovery CD because they are specific to your hardware configuration of notebool.

  HTH

• I need the recovery for Satellite 5205-S703 CD

  I need the recovery for Satellite 5205-S703 CD

  Hello!

  If you need a recovery disk, you have to options.
  You can go to a local ASP and request a new or order you one directly from Toshiba.
  https://backupmedia.Toshiba.EU/landing.aspx

  Or you are using a Microsoft installation disc and download all the drivers from Toshiba tools but it takes a little more time.

  Good bye