Understanding ASM Capacity and Reservation of Free Space in Exadata
(Doc ID 1551288.1)
Last updated on OCTOBER 31, 2018
Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52.0 [Release 11.2 to 18] Oracle SuperCluster Specific Software Oracle Exadata Storage Server Software Oracle Database Cloud Schema Service - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later Information in this document applies to any platform.
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).
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.
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