[bbk3105]第12集 - Chapter 07 - 介绍oracle的asm存储设备

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Reblance

• ASM Files are equally spread across all disk in a Disk Group.
• Storage reconfiguration(add/drop/failure) leads to a need to rebalance.
• Rebalance is done automatically while Disk Group is online and only one extent is locked at a time.
• Disk add=> Share of file extents from all currently mounted disks are moved to new disk.
• Disk drop => File extents on dropped disk evenly moved to remaining disks.