Tuesday 9 July 2013

Lesson 55: ASM Benefits

ASM Benefits

Data is divided into multiple parts(chunks) and is stored across multiple disks. This is called Striping. Striping has two primary purposes,

1) To balance loads across all of the available disks.

2) To reduce I/O latencyMirroring protects data integrity by storing copies of data on multiple disks. If one diskis lost, the data can be retrieved from the other disk. Thus mirroring increases the availability of the data.

There is no file system overhead as ASM manages the disks directly. ASM is cluster-aware, thus serving as a shared storage for Oracle RAC.

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