By pwstephe-Oracle on May 20, 2014
The Oracle Database Appliance X4-2 comes with a total of 18 TBs of raw shared storage and depending on availability requirements can be configured in a mirrored configuration yielding 9 TBs of usable storage or configured in a tripled-mirrored maximum availability configuration for a total of 6 TBs of usable storage. In most cases this is a sufficient amount of storage but if users require additional storage, there are two options for storage expansion depending on their requirements.
Storage Expansion Shelf
The first option is to add the Storage Expansion Shelf that effectively doubles the raw storage and usable storage. The additional storage shelf is directly cabled to the storage controllers and zero-admin is required for the storage to be added to the Oracle Database Appliance. After you have cabled and turned it on, The Appliance Manager software configures and re-balances the data across both storage shelves which effectively scales in a linear fashion providing approximately twice the I/O throughput as all spindles are used for the data re-balance.
This is a great option when additional high performance locally attached shared storage is needed, especially for virtual environments where user defined virtual machines need storage space.
Networked Attached Storage
Customers can use Oracle compatible NFS-attached storage with Oracle Database Appliance.
An excellent option is to use Oracle’s ZFS Storage Appliance. There are several features of the Oracle Sun ZFS Storage Appliance that make it the ideal choice for expanding the storage capabilities of the Oracle Database Appliance. These features include intuitive management tools, real-time performance analysis, data compression, multiprotocol integration, de-duplication, cloning and Hybrid Columnar Compression, (HCC).
NFS storage is also a great option to create external database disk backups. Network attached storage for database backups allows isolation of backups from the internal storage, and opens a range of possibilities for management of the backups including replication to a remote site, snapshots for additional copies of backups, compression of backups by the ZFS Appliance, and sharing of the backups with another database server. For a good discussion of network storage backups, (See - Backup and Recovery Strategies for the Oracle Database Appliance).