Why ASM isn't down a disk (LUN) after that it disconnects during a period?

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• Why asm instead of ocfs

  Hi all
  Oracle having its own (OCFS) cluster file system, then why both clients or others will and preferring the ASM or RAW devices? There is no advantange than OCFS in others? can you describe me

  First of all, Let's clarify what each does. You probably know, in any case I'll put it down...

  OCFS is an Oracle cluster file system that has been designed for use with RAC. It only supports database files.

  OCFS2 is the second generation of the OCFS. Different from the previous OCFS, OCFS2 is a versatile file system that can be used for data files and also for regular files. You can use it to install the binary oracle, for example.

  ASM is a component of Oracle database that acts as a volume manager, offering the performance of raw devices with the manageability of a file system. ASM sales/o very well, he really avoids hotspots... This is because ASM distribute i/o between disks in a disk group. You can use ASM for database related files as data files, redo log files, arch, RMAN, backpset, etc.. You can not put binaries on ASM.

  Basically, the expected is: performance of raw devices and ASM tends to be better than that of OCFS2, but with OCFS2, you can use the commands like cp, mv, etc., etc., etc. It's really easy to use than the ASM and raw devices.

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  If you do not have to install the binaries in a shared file system, you can use Raw Devices to put the discs of OCR/Vote and you can use ASM for database files.

  PS: In my case, I have never used OCFS as file system cluster for files of databases, in fact, I've only used OCFS for database files to my class CARS and testing on my lab at home. in my business, I was always using ASM to linux basics in clustered environments and raw devices for discs of the OCR/Vote. I did a few tests in OCR/Vote OCFS2 discs and I did not like the results... I had rather put in raw devices as well as data in ASM files. I OCFS2 installed on these environments, but it has been used for common shared files, not for database files.

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• How to move ASM spfile to a different disk group

  
  Hello

  Because of less storage, we plan to move the ASMPARAMETER DATABASE file to the disk of data.2 group and delete the DATA disk group so that we can allocate these free disks to other disk groups.

  This isn't a RAC Setup.

  But I noticed the file ASMPARAMETER in the DataSet and disc of data2. Could you please some help me in this.

  Oracle version is 11.2.0

  OS - Aix server.

  The Type redundancy ASM disk group: NORMAL redundancy

  I searched in Oracle Metalink and found this document - How to switch ASM spfile to a different disk group (Doc ID 1082943.1()

  Kind regards

  Stephen

  Hello

  For example, please check step bey:

  sqlplus / as sysasm

  SQL * more: Production version 11.2.0.1.0 on

  Copyright (c) 1982, 2009, Oracle. All rights reserved.

  Connected to:

  Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production

  With the option of Automatic Storage Management

  SQL > show the spfile parameter

  VALUE OF TYPE NAME

  ------- ------- --------------------------------------------------

  +DATA/ASM/asmparameterfile/registry.253.715881237 string SPFile

  SQL > create pfile='/tmp/pfile+ASM.ora' of spfile;

  Created file.

  2. create spfile in a new disk of the pfile intermediary group

  SQL > create spfile ='+ PLAY "of pfile='/tmp/pfile+ASM.ora."

  Created file.

  SQL > exit

  Disconnected from the database to Oracle 11 g Enterprise Edition Release 11.2.0.1.0 - Production

  With the option of Automatic Storage Management

  3. restart battery HA to check ASM starts fine with moved spfile

  crsctl stop $

  CRS-2791: from closing resources managed by Oracle high availability Services on "".

  ...

  CRS-4133: Oracle high availability Services was arrested.

  crsctl start $ has

  CRS-4123: Oracle high availability Services started.

  Verify that the new spfile is used

  $ sqlplus / as sysasm

  SQL * more: Production version 11.2.0.1.0 on

  Copyright (c) 1982, 2009, Oracle. All rights reserved.

  Connected to:

  Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production

  With the option of Automatic Storage Management

  SQL > show the spfile parameter

  VALUE OF TYPE NAME

  ------- ------- --------------------------------------------------

  +PLAY/ASM/asmparameterfile/registry.253.715963539 string SPFile

  SQL > select name, status from v$ asm_diskgroup;

  NAME STATE

  ----- -----------

  DATA CLIMBS

  ROOM RISE

  SQL > exit

  Disconnected from the database to Oracle 11 g Enterprise Edition Release 11.2.0.1.0 - Production

  With the option of Automatic Storage Management

  The use of the new spfile can also be verified with asmcmd as follows:

  $ asmcmd spget

  +Play/ASM/asmparameterfile/registry.253.715963539

  4. remove the original spfile

  $ rm +DATA/asm/asmparameterfile/registry.253.715881237 asmcmd

  And this is an example of moving ASM spfile with 'spcopy asmcmd ".

  1 copy the spfile with the-u option - Update the profile of negotiators in RAC environment

  $ asmcmd spget

  +Data/ASM/asmparameterfile/registry.253.722601213

  $ asmcmd lsdg

  G_files of Type Rebal sector block to Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks votin' state name

  EXTERN MOUNTED N 512 4096 1048576 14658 9814 0 9814 0 N DATA.

  EXTERN MOUNTED N 512 4096 1048576 9772 8507 0 8507 0 'N PLAY.

  EXTERN MOUNTED N 512 4096 1048576 9772 9212 0 9212 0 N RECO.

  $ asmcmd spcopy u +DATA/asm/asmparameterfile/registry.253.722601213 + PLAY/spfileASM.ora

  2. restart battery HA to check ASM starts with copiedspfile

  crsctl stop $

  CRS-2791: from closing resources managed by Oracle high availability Services on "".

  ...

  CRS-4133: Oracle high availability Services was arrested.

  crsctl start $ has

  CRS-4123: Oracle high availability Services started.

  $ asmcmd spget

  + Play/spfileASM.ora

  3. remove the original spfile

  $ ls-l asmcmd + DATA/asm/asmparameterfile

  Name of type Redund time scratched Sys

  REGISTRY.253.722601213 OF Y ASMPARAMETERFILE UNPROT COARSE 25 JUNE AT 10:00

  $ rm +DATA/asm/asmparameterfile/registry.253.722601213 asmcmd

  Other information plays please this link: http://blog.csdn.net/tianlesoftware/article/details/6347461

  Thank you

• ASM disks disappear after reboot Linux

  Hi all
  
  I am trying to install a demo of OEL 5.3 dedicated Oracle 11 g with ASM on a laptop.
  It is not a production configuration, I surely agree, but I hope it's good enough for the demo.
  My problem is with the DSO and asmlib.
  I went through the steps of the proclamation of disks asm (/etc/init.d/oracleasm createdisk ASM/dev/Vol...) and I can see the ASM disks via oracleasm listdisks.
  Everything looks ok, until I restart the machine.
  Then I can see is more disks (listdisks after scandisks) asm returns nothing, but the creatdisk fails.
  
  So, I guess my disks were marked as a disc of the DSO.
  But then, I wonder why I can't see in the list.
  
  I probably went wrong somewhere, but I can't find where.
  
  No one to help?
  
  Thank you very much in advance veru.
  
  G.

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  You will find documentation on metalink... document 558596.1 (https://metalink2.oracle.com/metalink/plsql/f?p=130:14:6282339176010950992:p14_database_id, p14_docid, p14_show_header, p14_show_help, p14_black_frame, p14_font:NOT, 558596.1, 1, 1, 1, helvetica)

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  It is a newer version of EL/HR 5. If you have an older version, you can find it here: /etc/udev/rules.d/50-udev.rules
  Same line should be placed in the comments here...

  Reboot after this change.

  Only it solved for us... hope that helps.

  Cayenne

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  Data Guard and network disconnects (Doc ID 255959.1)

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