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

Similar Questions

• The UNDO tablespace and its data file cannot be removed

  I would like to delete an UNDO tablespace after you have created a new, but can't. I could follow a large number of instructions TOM and others, but tablepspace is still listed in the State to RECOVER. Please see what I've done below. Your help will be appreciated.
  

  SQL > drop tablespace UNDOTBS2;
  Drop tablespace UNDOTBS2
  *
  ERROR on line 1:
  ORA-01548: active rollback segment "_SYSSMU29_1272378969$" found, terminate
  drop the tablespace

  SQL > drop rollback segment "_SYSSMU29_1272378969$";
  Drop rollback segment "_SYSSMU29_1272378969$".
  *
  ERROR on line 1:
  ORA-30025: DROP segment ' _SYSSMU29_1272378969$ ' (in the undo tablespace) not
  permit

  Have you tried that
  http://arjudba.blogspot.com/2008/08/ora-01548-active-rollback-segment.html

• What is the difference between: "Place...". ' or 'add files to download... '. » ?

  Where can I get information about the differences between "Place" commands... ' and 'add files to download... '. "the menu file?

  Understand that, in both cases, the files are related and non-integrated. But what other differences are there?

  I came across this question, because the widget 039 (animation Image Rollovers) of MuseThemes only works if you use the option 'add files to download... '. ».

  Thank you

  Daniel

  Hi Daniel,.

  There are a few differences between the two options-

  Place is used to add content to the page (rendered) while to add files to download... is used to transfer files to your site, but not on the page (not provided).

  The placed images are published to the folder/images from the server while images added using Add files to download... option are posted to the liabilities on the server folder.

  Placed images have a chance to get famous (if resized/interpolated in Muse) to publish all images added using Add files to download... keep their names.

  Can be used to add file formats limited as jpg/png/psd/swf/oam etc so that you can download almost any type of file using Add files to download...

  You see not contained in the drop-down list of links placed for binder files added using Add files to download... appear in the dropdown links so that you can bind to them and allow the download.

  The two serve different purposes and add files to download... is preferred by Widget developers because it gives more control over the downloaded content and insurance this file location and name will be as expected.

  Hope that the above gives you clarity on the fundamental difference.

  See you soon,.

  Vikas

• tablespace with multiple data files

  Hi all
  
  We have RHEL4 server with oracle 10 g 2 inside.
  
  can we create a tablespace with multiple data files? I mean while creating a tablespace itself, we should be able to create two or more data files (should not use ALTER tablespace command).
  
  If possible, please give me the SQL to do this (assume that I need to create a tablespace with two data files).
  
  Thanks in advance...

  Not so difficult isn't it?

  create tablespace datafile test
  '1.dbf' size 1 m REUSE AUTOEXTEND ON NEXT 32 M MAXSIZE 1500 M,
  '2.dbf' size 1 M REUSE AUTOEXTEND ON NEXT 32 M MAXSIZE 1500 M
  EXTENT MANAGEMENT SEGMENT LOCAL SPACE MANAGEMENT AUTO;

• 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 advance

  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 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.htm

  BUFFER REDOLOG
  http://www.DBA-Oracle.com/concepts/redo_log_buffer_concepts.htm

  UNDO TABLESPACE
  Undo tablespace to cancel files to undo or roll back uncommitted changes pray the database.

  Hope you understood.

• difference between switch logfile and checkpoint

  Hi all
  What is the difference between
  Forcing log switches:
  ALTER SYSTEM switch logfile;
  
  and
  ALTER SYSTEM checkpoint;
  
  When I use one and don't use the other
  
  Thank you very much

  Its similar comparison mangoes with tomatoes. Checkpoint is a number that is used to make sure that everything is in harmony with the other data files, control files. They are used in different places for different reasons.
  The newspaper fles, as mentioned by Satish, Siwtching is used when it is necessary to create a log file to archive. The only link between this and the control point is that this event causes also point of control and full control point to arrive.
  HTH
  Aman...

• Difference between DAQ and DAQmx for acquisition of data PCI 6534

  Hello

  I use the PCI DAQ 6534 card for my digital I/o transfer. I am beginner in the labview.

  I want to store the data coming in memory and the reading of the data at the level of the trigger.

  I have seen the examples in the labview. Some have used DAQmx and DAQmx read write that screws and some have used the confg DIO port and all...

  So I want to know the difference between these two. For my application that I use?

  Hey Bo,

  First of all, I would recommend that you discover the NI 6533/6534 for NOR-DAQmx help. You may be able to find some of your answers in this help document. Now for what you try to do in your application, it looks like you are only buying data. If this is the case, with the 6534, the device acquires data in memory shipped as soon as the DAQmx series start task VI, as long as you don't start hardware triggers have in place. If you have a trigger of starting material, then will make the purchase of the aircraft after the DAQmx start task VI and only after you receive this material trigger. If you call not the DAQmx Read VI, then the data will be stored in the memory board for you, as the driver manages this data in the on-board memory storage, until reading DAQmx VI is called, which at that time, data is transferred to the Board of Directors in the memory of the computer. Once you get it in the computer's memory, you can do whatever you want with these data, as this graph or treat. If you look at the sample programs (which have been mentioned on how to find those in a previous post), you can find an example that little shows you how it works. One of the examples that you can check is called reading Dig Port-Ext Clk.VI. In this example, it sets up to read a finite number of samples and then starts the task. If you set a breakpoint on the line of the error after the VI begin, the data will be acquired in the amount of on-board memory. Then when you cancel the break of the VI, data will be extracted from the amount memory embedded in the memory system with the reading VI DAQmx. Again, the pilot takes care to put the data in the memory board for you once you start the task.

  I hope this helps. Please let us know if you have any questions or concerns about this issue. Also, certainly, discover and try to run all the programs related to the 6534 examples so that you can learn how the equipment works and how to use features to do what you want your program to do. Also, be sure to read through the help on the 6534, as well as the help of VI documentation to learn what makes each function. Thank you and have a nice day.

  Kind regards

  DJ L.

• What is the difference between the external SCSI cables and cables data acquisition

  Hi all, I would like to make a simple extension using an external SCSI cable and a NOR 184749/SH 6868. In other words, it would be: female HD68 bolt of the cable ends OR coupled to an external SCSI HD 68 male with a VHDCI 68 male cable. What are the differences between the external SCSI cables and cables as the (M) 6868EP of the CHS data acquisition. Other than the sex of the end of HD68 is usually on one. How is the posting hit buy using an external SCSI cable for an extension to tell a BNC-2090?

  Yes, I realize that NEITHER wants us to buy their cable, but in these economic times difficult, to do use all available resources, so I have to try,.

  Thank you

  joelowwatt

  Hello

  As long as you have compatible connectors, SCSI cables will work DAQ of basic functions.  They have the advantage of NO cables is that we can meet our DAQ hardware.  So, we can create pairs twisted differential pairs to HAVE, using the ground for shielding terminals and generally specialize the cable to minimize noise and crosstalk.  Because the SCSI cables are not specialized, you are likely to see the most noise and, if you go the sampling rates more Rapids, crosstalk.  If you are in a laboratory or factory with a good amount of noise EMF that your readings are not quite as clean, or if you have fluorescent lights you might see 60 Hz noise you might not see otherwise.

  If you want more details on the specifications of the SH68-68-EPM cable, I recommend these two articles.  The first example of the twisted pair and the principles of the SH cable shielding and the second gives the most precise specifications that you can compare with when looking for a SCSI cable.

  3GRD4C33 Knowledge Base: mapping list of the sons of SHC68-68-EPM & SH68-68-EPM cable

  1TGEHPDM knowledge base: detailed specifications for the SH68-68-EP cable

  Kind regards

• Tablespace with a data file name in double and the directory added

  Version Oracle 11.1.0.7
  AIX platform
  
  I have exactly the same directory for the tablespace even a tablespace with 2 files with exactly the same name.
  
  I don't think it was possible for Oracle create two data files in the same directory with exactly the same data file for a tablespace name.
  
  The difference between the two seems to be the sizes - one is 10G, the other is 10 m autoextend on but with maximum size is equal to the size of create.
  
  It is not possible to table either both are full.
  
  Please notify.
  
  Thank you.

  You have a character that is hidden in the name of the file. Use ls for your operating system which shows the special characters (ls - lb or something, man ls).

• create tablespace with existing data file

  Dear Sir.
  We can create tablespace with an existing data file so I can use the tables and objects already exist in the data file?
  
  Kind regards

  Read about "transportable tablespace" and see if this is what you need.

• Use of a single tablespace or backup data file

  Hello
  
  I read the RMAN manual and I'm quite familiar with backup a tablespace or data file, but I can find very little uses for it. Backup upward a tablespace is useful for the TPITR, but since who needs another instance sound very little useful in most production environments. I think that you cannot restore an older version of tablespace in a normal database, except if the tablespace has been done long read-only, in which case RMAN optimizations will do the trick.
  Still less use that I can find for the backup of the data file. I have absolutely no idea of what you can do with a single data file.
  
  Can you please tell me about the uses of these RMAN features?
  
  Thank you.

  Hi again!

  OK, you're right. If you are using noarchivelog moden then a partial database backup is no useful. Only the archivelogmode can make a useful partial backup of DB.

  Best regards

  Florian W.

• difference between redo log .rdo .log extension

  Dear Sir.
  
  There is a difference in the speed o If we create the log to roll forward with .rdo or .log extension?
  
  
  Kind regards

  Previous versions of db Oracle used to talk about the extension as *.rdo but now its *. log. But whatever the extension, it makes no difference in the work. You can even do *.txt, there would still be a Redo Log files.

  Aman...

• Bug in data modeling: create undo tablespace

  The output of the DDL script for the Undo type tablespace has a spelling error:
  
  CREATE UNDO TABLESPACE UndoTBS1 PETIT_FICHIER
  DATA FILE
  ' C:\oracle\product\10.2.0\oradata\VolksNet\UNDOTBS01. DBF ' SIZE 512 M AUTOEXTEND ON NEXT MAXSIZE 16 K UNLIMITED
  LOCAL MANAGEMENT MEASURE
  GUARANTEE OF TENSIONING
  ;
  
  It spells TENSION instead of RETENTION.

  Thank you, I logged a bug.

  Please note that we have a feedback customer specific applications to track issues for data modeling, although it is still an early release of the adopter. The link is http://apex.oracle.com/pls/otn/f?p=2306:10

  Sue

• Undo tablespace filled with 95%

  Hi all
  
  We have R12.1 Instance with RDBMS 11.1.0.7.0.
  Undo table space here is got filled up to 95%, all the data files are not in AUTOEXTEND.
  
  In this case, I need to add a data file?
  If I add a file of data, is the performance database will be mediocre?
  
  Please suggest...
  
  
  Thank you
  Shaik

  Undo tablespace full when data files are not in mode autoextend is normal. PL see this Doc MOS

  UNDO tablespace full gr 10 2 [ID 413732.1]

  If you stop seeing any error ORA-01555, you don't have to do anything.

  HTH
  Srini

• Diff between switch logfile and archive current log

  Hello
  I see that the effect for the two statements are the same
  ALTER SYSTEM switch logfile;
  =
  ALTER SYSTEM archive log current;
  
  
  is that there is no difference between them?
  Thank you

  Hello..

  ALTER SYSTEM switch logfile;

  =
  ALTER SYSTEM log current ;> archives

  alter system switch logfile--> switches to the following log file, regardless of the mode that the database is in ARCHIVELOG or NOARCHIVELOG mode. If the archivelog mode change system swicth logfile will generate the Archives of the redolog which was changed.

  change the current archiving--> oracle here log system passes current related to records and archives as well as all other newspapers not archived. It can be fired only the database that is in ARCHIVELOG mode.

  [http://download.oracle.com/docs/cd/B10501_01/server.920/a96519/backup.htm]

  HTH
  Anand