Clusterware and/or CARS on separate storage, synchronized by applying the redo logs?

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  Whenever I do any type of adjustment in the effect of lumetri, monitors go black

  Hi Jerry,

  You have a structure of AVCHD (MTS) files folder?

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  Close Premiere Pro.

  Go to the Documents folder and folder rename Adobe at old_Adobe.

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• datafiles and redo logs on the same drive

  Hi guys,.
  
  http://docs.Oracle.com/CD/E11882_01/server.112/e25494/onlineredo002.htm#i1306224
  
  >
  
  Data files should also be placed on different disks of redo log files to reduce contention in writing of the data blocks and redo records.
  >
  
  I really think if he actually any challenge when the first of all oracle can only writes files 1 redo log at a time.
  http://docs.Oracle.com/CD/E11882_01/server.112/e25494/onlineredo001.htm
  >
  Database only Oracle uses redo log files at the same time to store redo records written since the restore log buffer by progression. Log roll forward LGWR is preparing actively to is called the log during recovery.
  >
  
  If the process flow, I got after reading the chapters is
  
  When LGWR fills a log file of redo (roll forward records) then there will be a log switch + control points where writing for data blocks occur. There seems to be a flow series rather than a simultaneous sort of flow. So I don't really understand it when he speaks of contention will take place when records of data and files written redo which is the redo log file are on the same disks.
  
  Just to confirm with you guys, whenever there is a switch of newspaper one point of control occurs too right.
  http://docs.Oracle.com/CD/E11882_01/server.112/e25494/onlineredo002.htm? You can search checkpoint to access the section she made mention of this documentation.

  Think about this:

  Restore means to keep the information around in case you need to re-do (recovery or standby mode, i.e. the continuous collection). Updates as you do in a broad sense will be so potentially being twice, once for the data files and once to do it again. I'm sure you understand that the data is written in memory, and then later to the data by the writer of the db files, while there could be many more group of writing data, or they may even be long delayed. In addition, the data files are read at random, so you can't really think again in series compared to the data. Do it again is series, archiving is set, but the data is random, and random how depends on how your system is used.

  So that means all the type of reads and writes per redo and archive is fundamentally different from data and cancel. In the first case, you want to be able to breath out as I/O that you can, for the latter, you want to be able to randomly reading or writing at different times, with Oracle being smart enough to do a bit of it in memory and optimistic enough to make assumptions on when to do things and quite lazy for not doing everything right. Roll forward is critical.

  A while ago, someone pointed out that the e/s modern buffered in memory, do not really worry about this, because all the work required to set up and maintain it after spending records, fees are not much better than striping and mirroring everything (you can google SAMI). This is true to a point, and we can debate endlessly about RAID types and their effects on performance and how their buffering makes [url http://www.baarf.com/] useless BAARF. But the real debate is, where is the point that you should use separate to redo and data devices? In the real world, we often receive a standard hardware configuration, which works very well until it's not. A disk or controller will puff in a RAID-5 can happen "is not" real quick.

  You should probably take two thoughts:

  The docs are pretty General, and some old tips do not apply, may have transformed into myth or perhaps too general to be meaningful.

  There is always something in the db, and the more things underway, less you can make generalizations about the serialization.

• Redo logs and crash of the disk where they are stored

  What happens when the disk where the redo logs are written becomes HS (e.g., a disk crash). I read somewhere that the database be shutdown. Is this right? You can ask to copy the recovery logs at 2 locations in order to improve the security of the system?
  
  Thanks in advance,
  Alexandre Bailly

  user8716187 wrote:
  What happens when the disk where the redo logs are written becomes HS (e.g., a disk crash). I read somewhere that the database be shutdown. Is this right? You can ask to copy the recovery logs at 2 locations in order to improve the security of the system?

  Thanks in advance,
  Alexandre Bailly

  Online redo logs can and should be multiplexed, with copies on separate physical devices. The details are in the ALTER DATABASE command, found in the SQL reference Guide. Additional information can be found by going to tahiti.oracle.com, drilling until your product (without name) and version, the by using the "search" feature to find something on "restore". A lot of information in the Administrators Guide.

  In addition, default Oracle will appoint the «redo_*.log» redologs ".Log" is an open invitation to ITS s to open the with a text editor or delete. After all, 'it's just the log file I named mine by the older convention of the "redo_*.rdo" just to reduce this kind of human error.

• Question on create Redo log after restoring files and recover

  Log files to rebuild RMAN backup? Below the blog describes the steps to restore and recover a RMAN backup in a new host.
  http://blog.CSDN.NET/sweethouse1128/article/details/6948273
  
  
  RMAN seems to have backed up and restored the redo log files
  
  
  After the resumption, blogger issues

  select * from v$logfile;

  and the result obtained some log files. The rows returned are restored files redo log. right? Redo of RMAN backup and restore log files?

  Redo of RMAN backup and restore log files?

  N ° never. Even when you do a 'coherent' backup (i.e. with the database MOUNT but the mode is not OPEN).

  When you restore a full RMAN on a new server backup, RMAN restore REDO LOG files in the respective directories

  Does not apply because RMAN does not save logs in restoration online.

  Isn't better to manually create redo log files after restoration

  When you perform incomplete recovery, you must issue an ALTER DATABASE OPEN RESETLOGS.
  The RESETLOGS creates log files remake it, if they are not present OR reset them if they are present.
  In a scenario of complete restoration, the online redo log files are already present on the drive (i.e. they are not lost or destroyed and they are not restored a backup).

  Hemant K Collette

• 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.

• Redo Log and Supplemental Logging doubts related

  Hi friends,
  
  I am a student extra import logging in detail. Reading a lot of articles and the oracle documentation to this topic and redo logs. But couldnot find answers some doubts...
  Please help me to delete.
  
  Scenario: we have a table with primary key. And we execute a query update on the table that does not use the primary key column in a clause...
  Question: in this case, the roll forward records entry generated for changes made by put request to update contain primary column values... ?
  
  Question: If we have a table with primary key, we need to enable additional logging on primary column of this table? If so, in what circumstances, do we need to?
  
  Question: If we set up replication streams on this (having the primary key) table, why do we really need to enable saving of its complementary (I read documentation saying that flow requires some then more information., but in reality what information does it. Once again this question is closely related to the first question.)
  
  Please suggest also any good article/site that provide inside details of the redo log and additional logging, if you know.
  
  Kind regards
  Lifexisxnotxsoxbeautiful...

  (1) assuming that you do not update the primary key column and additional logging is not enabled, Oracle doesn't have to log in the primary key column in the log to roll forward, just the ROWID.

  (2) is rather difficult to answer without being tautological. You need to enable additional logging if and only if you have some use downstream for additional columns in the redo logs. Rivers and streams, these technologies built above are the most common reason to enable additional logging.

  (3) If you run an update as

  UPDATE some_table
    SET some_column = new_value
   WHERE primary_key = some_key_value
     AND <>
  

  and look at an update statement that LogMiner relies on newspapers in recovery in the absence of additional record, basically it would be something like

  UPDATE some_table
    SET some_column = new_value
   WHERE rowid = rowid_of_the_row_you_updated
  

  Oracle has no need to replay the exact SQL statement you issued, (and so he doesn't have to write the SQL statement in the redo log, he doesn't have to worry if the UPDATE takes a long time to run (otherwise, it would take so much time to apply an archived log as it did to generate the log) ((, which would be disastrous in a recovery situation) etc.). He just needs to rebuild the SQL statement of the information contained in the restoration by progression, which is just the ROWID and the columns that have changed.

  If you try to execute this statement on a different database (via the stream, for example) may the ROWID on totally different destination database (since a ROWID is just a physical address of a line on disc). So adding additional record tells Oracle to connect to the primary again key column and allows LogMiner / flow / etc. to rebuild the statement using the values of the primary key for the changed lines, which would be the same on the source database and destination.

  Justin

• passing CARS again peripheral storage DSO-based

  We have recently installed Oracle 11 GR 2 CARS on a cluster of REH 5.3. CRS, voting disk and database files are all sitting on a group of ASM disks (on a Clarion storage device). A decision is made to move everything to a new storage device (DMX). We use EMC powerpath.
  Y at - it an easy way to move this cluster of Oracle to another storage device.
  We can rsync, the grid and binaries of RDBMS that are installed on a file on each node linux system, but I would like to know how to move the shared storage that is hosted on the ASM.
  We used asmlib 2.0 to create the disc of the DSO and then invoked the clusterware Installer and DBCA to create the Group of disks, the cluster components and the oracle database.
  Do I need to back up the database of ASM and our CARS (with RMAN) database in a flat filesystem first and restore once the new ASM disk is created in the new storage device?
  A procedure step by step will be greatly appreciated.
  Thank you
  Omer

  Yes its possible without backup/restore... good to full-back in the case of any mishappening.

  Please read the metalink for process step by step...

  Exact to migrate ASM steps starts to SAN another without service interruption. [837308.1 ID]

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