This post describes how to implement Oracle Database Snapshot Technology on Exadata Machine.
Because Exadata Storage Cell Smart Features, Storage Indexes, IORM and Network Resource Manager work at level of ASM Volume Manager only, (and they don’t work on top of ACFS Cluster File System), the implementation of the snapshot technology is different compared to any other non-Exadata environment.
At this purpuse Oracle has developed a new type of ASM Disk Group called SPARSE Disk Group. It uses ASM SPARSE Grid Disk based on Thin Provisioning to save the database snapshot copies and the associated metadata, and it supports non-CDB and PDB snapshot copy.
The implementation requires the following minimal software versions :
- Exadata Storage Software version 220.127.116.11.0.
- Oracle Database version 18.104.22.168 with bundle patch 5.
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