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Oracle 11g release 2: ASM Optimal Disk Placement (ODP)


Oracle11g release 2Tips by Burleson Consulting
August 11, 2008

 

ASM Optimal Disk Placement (ODP) in 11gR2

As of Oracle 11gR2 it is possible to specify on which disk regions the ASM Disks will be placed. This enables us to make use of faster disk zones on the outer regions of disks for better I/O performance.

Oracle has been sitting together with storage vendors and found ways to enable ASM to make use of storage intelligence features. These settings can be made on DiskGroup Templates and are changeable afterwards with an ALTER DISKGROUP statement.

See ASM intelligent file placement Tips

Also see Disk I/O tuning techniques.

Possible options are hot/mirrorhot and cold/mirrorcold.

ALTER DISKGROUP disk_group ADD TEMPLATE template
ATTRIBUTES (
MIRROR|UNPROTECTED
FINE|COARSE
HOT|COLD
MIRRORHOT|MIRRORCOLD )
 
 
ALTER DISKGROUP diskgroup ALTER FILE 'filename'
ATTRIBUTES (
HOT|COLD
MIRRORHOT|MIRRORCOLD )
 
 

 

 

 

If you like Oracle tuning, you may enjoy my new book "Oracle Tuning: The Definitive Reference", over 900 pages of BC's favorite tuning tips & scripts. 

You can buy it direct from the publisher for 30%-off and get instant access to the code depot of Oracle tuning scripts.


 

 

  
 

 
 
 
 
 

 
 
 
 
 
 
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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

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