Resizing Grid Disks in Exadata: Example of Recreating RECO Grid Disks in a Rolling Manner (Doc ID 1465230.1)

Last updated on JUNE 28, 2023

Applies to:

Oracle Exadata Storage Server Software - Version 11.2.1.3.1 to 12.1.2.1.0 [Release 11.2 to 12.1]
Information in this document applies to any platform.

Goal

This procedure describes how to resize ASM disk groups to shrink one with excess free space and grow another that is near capacity. Typically, the RECO disk group will be shrunk down and the DATA disk group will grow. This procedure works particularly well in cases where the DATA disk group is almost full and the RECO disk group has enough free space to permit rebalancing at least a single cell’s worth of data.

If your grid disks have sufficient free space to expand your disk group, then you may be able to use the simpler procedure in note 1684112.1.

This procedure is deprecated in favor of the one in 2176737.1 : How to Resize Grid Disks in Exadata. This procedure will increase griddisks while keeping space contiguous on the disk and in the same offset order. This is a time-consuming and complex procedure that originally was done to optimize I/O performance, but this optimization is no longer needed with the use of writeback flashcache.