Tuesday, February 25, 2014

Oracle Automatic Storage Management - ASM


  • ASM is a volume manager and file system.
  • ASM operates efficiently in both clustered and nonclustered environments.
  • ASM is installed in the Grid Infrastructure home
  • Separate from the Oracle Database home.

ASM Key Features and Benefits
  • Stripes files rather than logical volumes
  • Provides redundancy on a file basis
  • Enables online disk reconfiguration and dynamic  rebalancing
  • Reduces the time significantly to resynchronize a transient failure by tracking changes while disk is offline
  • Provides adjustable rebalancing speed
  • Is cluster-aware
  • Supports reading from mirrored copy instead of primary copy for extended clusters
  • Is automatically installed as part of the Grid Infrastructure

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