Understanding ASM Capacity and Reservation of Free Space in Exadata
(Doc ID 1551288.1)
Last updated on MAY 17, 2024
Applies to:
Oracle Database Cloud Schema Service - Version N/A and later Oracle Cloud Infrastructure - Database Service - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later Oracle Database - Enterprise Edition - Version 11.2.0.3 to 19.3.0.0.0 [Release 11.2 to 19] Information in this document applies to any platform.
Purpose
This note discusses the concepts of ASM disk group failure coverage, how to reserve free space to cover disk or cell failure in an Exadata environment, and how to determine the resulting capacity of a disk group (DG).
Scope
This applies primarily to Exadata which uses ASM for storage management. This information is intended for architects, database, and systems administrators who will plan and manage storage in the Exadata environment. It is believed that the concepts apply to non-Exadata environments, but the assertions in this note have not been tested in non-Exadata environments.
Details
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