ASM 簡介

In brief , ASM 是Oracle 用來做RAC filesystem 管理用的，可對應到多個raw devices

其實就是一個管理raw device 的interface ，速度可以隨著raw device 數量增加而提升

效能，raw device優點就是io 十分快速，不需透過OS inodes 去對應存取disk blocks

但在檔案方面如果要做存取 或更改，也要在enterprise manager console 或透過oracle

XML DB，以ftp來存取virtual files.

ASM

http://www.oracle.com/technology/products/database/asm/index.html

ASM with EMC storage

http://www.oracle.com/technology/products/database/asm/pdf/asm-on-emc-5_3.pdf

EMC CLARiiON SnapView and MirrorView for Oracle Database 10g & ASM .

http://www.oracle.com/technology/products/database/asm/pdf/EMC%20CLARiiON%20SnapView%20and%20MirrorView%20for%20Oracle%20Database%2010g_6-26.pdf

ASM 10gR2 best practice

http://www.oracle.com/technology/products/database/asm/pdf/asm_10gr2_bestpractices%2009-07.pdf