difference between online redolog files and archived log files

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• Difference between redo logfiles, Undo Tablespace, Archive log data file

  Can some please highlight the difference between Undo and Redo Logs
  Also why we need to separate the archive logs when the recovery log data can be written directly in data files...
  
  Help you will be highly appreciated...

  Hello

  Ed gave you a very good answer.

  Rememeber database files are online and they are written to by DBWR process. So we have the database files, redo log files and archive logs.
  In order to avoid all the crawl log when you perform a recovery, database performs control points that summarize the State of the database. This operation of control point provides a shortcut to the recovery. At the checkpoint, the database knows that all incorrect pages were written to disk (for example, database files). At the time of recovery, the log (which includes-finished and unfinished transactions) is used to bring the database to a consistent state. The system locates the time of the last checkpoint and returned to this position in the log file. Then he restores forward all completed transactions (read committed) that occurred after the last checkpoint and rolls back all transactions that were not committed, but that began before the last checkpoint. This is where online log files are used.

  Now imagine that you need to back up your database GB 100 + all 10 minutes. It would be a waste of space! So you take a backup of your database at time t and backups of archiver process redo logs periodically to check the newspapers so that redo log files can be replaced and RMAN will use the last backup and archive the log files to recover your database at the time.

  Now, I mentioned the checkpoint process. The Checkpoint process regularly launches a control point that uses DBWR to rewrite all the blocks Sales in the data files, so synchronize the database. Imagine one dam is running and have exhausted all the redo log files. At this point, Oracle will wait until all Sales already queued blocks have been written to the buffer on disk (database files) foremost him redo log files can be considered as superfluous and available for re-use (i.e. can be overwritten). This will result in the following message in the alert.log:

  Thread 1 advanced to log sequence 17973
    Current log# 3 seq# 17973 mem# 0: /oracle/data/HAM1/log3aHAM1.dbf
    Current log# 3 seq# 17973 mem# 1: /oracle/data/HAM1/log3bHAM1.dbf
  Thread 1 cannot allocate new log, sequence 17974
  Checkpoint not complete
    Current log# 3 seq# 17973 mem# 0: /oracle/data/HAM1/log3aHAM1.dbf
    Current log# 3 seq# 17973 mem# 1: /oracle/data/HAM1/log3bHAM1.dbf
  Thread 1 advanced to log sequence 17974
  

  I am sure you have done the following:

  alter database mount;
  
  Database altered.
  

  When you mount a database, Oracle combines the instance started the database. Oracle control files are opened and read. However, no checking such as the restore/recovery is performed

  alter database open;
  
  Database altered.
  

  An open command opens the data files, recovery logs, it performs automatic and consistency of database recovery. At this point, the database is now ready to be used by all valid users.

  HTH,

  Mich

  Published by: Mich Talebzadeh on November 19, 2011 16:57

• Is there a difference between a Hot Backup and online backup?

  Version: 10 g 2
  
  Is there a difference between a Hot Backup and online backup? These terms are not interchangeably used? Could not find a wire similair in OTN.

  Yes, these terms are used interchangeably.

• Failed to create the recovery disk - error: differences between the following files

  Hello, I am using the recovery disc option, but during the creation of the third disc, I get this error repeatedly (I tried to create 4 + times now, using the same type of discs that worked well with the first 2 discs). The full error message is:

  "differences between the following files. "Source path: path:F\ZZImg\09753XSP2.swm E\HDDrecovery\SWImg\0975XSP2.swm target (error code: 02016F-3 c-00000000)"

  How to solve this? I want to reformat my laptop, and the thought that it would be better to create these discs first. It is recommended to have the front discs I try to reformat? This error would prevent me to use the option 'restore factory settings' which is present by pressing the 0 key during the loading screen?

  (I'm not very technically capable, so I am greatly worried something bad).

  Any help would be greatly appreciated.

  Thank you.

  Have you tried using different disks from different manufacturers?
  To do this. I had similar problem and it was not entirely compatible disc-related.
  I use TDK R CD or DVD. They work great!

• What is the difference between HP Photo Creations and Snapfish

  I've been curious.

  What is the difference between HP Photo Creations and Snapfish?

  Hi Jeff17866. The difference between these two services are the location, accessibility and share-ability of the recorded images. Snapfish is a photo on the web edition and sharing and belonged to printing HP service. You upload your images on the Snapfish site and share with other sites (Facebook, Flickr, etc) by selecting the appropriate options. The images are then stored on the cloud, and you will be able to access it from any device with Internet access. So, if you want to easily share your photos with your friends and family around the country, Snapfish is a great tool to do. HP Photo Creations is a photo editing software that you download to your desktop. You can edit your photos and order prints just as with Snapfish, but all pictures remain on your hard drive. They can be shared by downloading files on the sites you want the images appear, but you are not able to access it on other devices. -Chauntain

• difference between the binding context and link container

  Hello experts

  can you please explain to me the difference between the binding context and link container.

  I searched on the net but unable to understand the concept.

  Hello

  the BindingContext represents the DataBindings.cpx file execution and is a record of BindingContainers and their mapping pages and views. In addition it contains information about the data used by an application controls. The link container is the representation of the execution of the file PageDef and gives you access to the collections, methods, and attributes of the data used by a page or view. Context binding is a house while the link container is a piece in.

  Frank

• What is the difference between the MapViewer.war and the .ear in 11.1.1.7.1

  There are two sets of files mapviewer, the mapviewer.war and the mapviewer.ear in Oracle Fusion Middleware MapViewer Version 11g ps6 (11.1.1.7.1).
  
  What is the difference between the mapviewer.war and the mapviewer.ear in 11.1.1.7.1?
  
  Which one should I install in the Glassfish?
  
  The mapviewer.war is mapviewer11g_qs\apps.
  
  Thank you
  
  Published by: 1008396 on May 28, 2013 13:24

  war is the mapviewer preconfigured/deployed in this container of glassfish.

• The difference between the admin directory and directory patch?

  What is the difference between $< PRODUCT_TOP >/admin/sql and $< PRODUCT_TOP > / 115/patch/sql
  
  I looked at a number of packages on my system, and they seem to be constructed from its location *.pls in my $< PRODUCT_TOP > / patch/115/directory sql
  
  However it is normally also have a file with the same name in $< PRODUCT_TOP >/admin/sql, but it generally has a different version number (in my case, I found some files in it that have a version number that is greater than what is in the directory of 115/patch/sql)
  
  Thank you
  Jim

  My understanding is that the product admin directory using automatic upgrade as part of an upgrade?

  Fix.

  Q. Since Auto Upgrade is involved, I guess that means say 11i upgrade for R12 (what was once a migration) rather than what would be a Pack of updates to version (which is formerly a Maintenance release) for example 11.5.10.2?

  I would say that it is applicable to all the patches that update APPL_TOP, so it applies to the outermost Regions and the Maintenance Pack patches but not an 11i to R12 as a new APPL_TOP upgrade is created in this case (unless you are referring to the new APPL_TOP).

  Q. the patch product_top directory holds transferred files in to adpatch?

  Yes.

  If he holds only the latest version provided by the various patches that have been applied to this top product?

  Yes.

  Q: why would the product_top directory admin hold files with version numbers higher than that which is in the product_top patch?

  Can you give an example for this?

  Thank you
  Hussein

• Is there a difference between fx. the FX3800 and GTX 260 Nvidia?

  Does someone understand why I got frustrated and confused about all the discussions of this video card?

  Some said that the FX3800 is a stabillity of card - more pro - etc better than the cheap cards - as the GTX 260/285/295 - and some told me that GTX 260 = FX3800. I read on other pages about how people have problems with their GTX 260, recognized as a FX 3800 (not in the body, but by the Nvidia software). Other places recounts how softmod GTX 260 for a FX 3800. Some told me that there is a big difference between these cards - others they look almost - same GPU etc. I read that the difference between the GTX 260 and FX 3800 is just the look of it from the outside - inside, they are confused - and that apart from that only drivers are different.

  I ordered the FX 3800 - believing that he will be more powerful and more stable and give me really good read made domestic PPro CS5 compared to my GTX 260. If I get the same performance and stability by changing just two lines in a text file with my old GTX 260, I feel betrayed... I hope that this does not occur.

  A person from Adobe or Nvidida - please tell us - than there is a differnece between fx. the GTX 260 and the FX 3800 outside appearance and some drivers? If there is no difference between them - I see no other reason to support only the FX cards only $$$... If there is a difference in favour of Quadra/FX - and I hope sincerely - I understand why you choose cards Quadro - but if they are just as good inside - I just feel we have all been misled. I could have saved my money... time will tell - I get the FX 3800 in a few days... can´t send it (rules Danish when you buy as a company) - so I m $ 1000 this month...:)

  I would feel much more comfortable in having ordered the FX 3800 if someone from Adobe could me excactly how much better FX 3800 comes from the GTX 260 - outside to be supported and is not the GTX. And if there is more in it just to change a simple text file? Are there several things happening inside the body - deep inside - that is affecting the performance with FX cards in addition to two lines in a text file? Who can help to answer this question - and I mean, really, to respond in a serious way - not just say - of course the FX is better - because her expenssive more.

  Haven´t we all have experience in other situations? Like buying a car? FX. inside the SKODA FABIA is a VW engine like those used in the much more expensive VW cars. Only difference is the name and appearance - and some comfort. The engine is the same - and in a way, we could say that a motor-point-of-view - the cars are similar. But you pay for the convenience.

  The same thing is happening here? I pay more for FX 3800 for some software drivers, which makes it more stable - and the look of it from the outside, but inside, it's just like the GTX 260? If a graphic-performance-GPU-point-of-view fact, I have two cards that look alike, and I reaaly payroll software and non-material?

  / Morten

  I lie in my bed - think of the nice new bicycle I could buy

  Like this one:

  

• What is the difference between the Service Station and Tempro?

  Searched for information on this, but have not been able to find:

  What is the difference between the Service Station and Tempro?

  I just run the wizard upgrade Toshiba and it installed the gas station but Tempro is already installed and seems to do the same.

  Concerning

  Bushy

  Hello

  These two tools are Toshiba one informs you of the new driver updates available on the Toshiba driver page.

  AFAIK Tempro is slightly older than the gas station.
  In addition the gas station seems to provide a bit more options and features like tool Tempro.
  However, I recommend using one my favorite utility's Service Station

• What is the difference between Ubuntu desktop edition and server edition?

  What is the difference between ubuntu desktop edition and server edition?

  Desktop Gets the window manager and terminal server :)

• Difference between Satellite Pro L300 and Pro A300

  Can someone please tell me the difference between Pro A300-21F and Pro L300-1RS as specifications on Tosh pages seem to be identical.

  Like us all, I'm looking for the more powerful machine at the lowest cost. TKS

  _Satellite pro A300-21F: _
  -Intel (r) Pentium (r) Dual Core processor T3400
  -SATA 160 GB (5400 RPM)
  -Chip graphics Mobile INTEL GL40
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  _Satellite pro L300-1RS_
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  -Chip graphics Mobile INTEL GL40
  -No Bluetooth
  -No fingerprint sensor
  -TV out (composite) or RGB external monitor available routes

  You are right, the two models of notebooks seems to be very similar and supports virtually the same devices.

  Good bye

• Re: Difference between Satellite L750-10F and Satellite L750-12 q

  What is the difference between the L750-10F and L750-12 q.

  Thank you.

  L750-12 q a 500 GB HDD and L750-10F has 750 GB of HARD drive.
  L750-12 q has USB 3.0 and USB 2.0 L750-10F.
  L750-12 q has REALTEK 802.11 (B/G/N) 13CH-RTL8188CE MOW - HMC and L750-10F has ATHEROS 802.11(B/G/N) V3.0 WB195-HMC w / BT + HS inside.
  L750-12 q is available in Poland and L750-10F in Germany.

  I found these differences. I hope I could help a little.

  Good bye

• What is the difference between the HX - 90v and HX - 80 coming cameras?

  What is the difference between the HX - 90v and HX - 80 coming cameras?

  Thank you!

  I'd say it's supposed to be a fill, a little brother to the HX90v

  It removes the control ring and the GPS, and I think the rest is the same.

  It is for those who want the HX90v but the price is a bit steep for the compact range, and they need not necessarily GPS or the ring of command, just a camera that works.
  This kind of thing, at least to my knowledge.

• Difference between the cDAQ-9174 and cDAQ-9178

  I have several cRIO-9081.  Each cRIO-9081 running NOR-DAQmx 15.5.  On four of the cRIO-9018 we show you cDAQ - 9178 with 8 modules.  Everything just worked.  On the fifth cRIO-9018, we tried to connect a cDAQ-9174.  The aircraft appeared in the Windows Device Manager and MAX, but MAX has indicated that the aircraft was missing (error-88705) and that Windows can't find a driver for the instrument.

  We then plugged a cDAQ-9178 in the fifth cRIO and everything just worked.

  What is the difference between a cDAQ-9174 and cDAQ-9178 other than the number of the module support?

  Paul

  Hi Paul,.

  It seems it could be a driver problem! What DAQmx version you have installed on two computers? Reinstall the latest version may be worth it because it looks like there may be corruption. You can find the latest version here: http://www.ni.com/download/ni-daqmx-15.5/5901/en/

  You can manually associate the device driver, here: http://digital.ni.com/public.nsf/allkb/5B80CAAA64413B4C86256C5E0000C1A7

  There are modules connected to the cDAQ chassis?

  Also, sometimes, this can happen if you do not restart your computer after the installation of the NOR-DAQmx driver. Restart your computer after the driver installation will allow you to reserve the device successfully. Here are a few others not to try:

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  • Reset the service OR charger
  
  
  • Reset the MAX Configuration database
  
  
  • The system power cycle