Release Notes
11 Migrating an Oracle Database to Dell EMC SC Series Storage | CML1001
consistency group. SCOS 7.2 has lifted the maximum number of volumes in a single consistency group from
40 to 100. Section 3.3.2 describes the use of a consistency group with taking database snapshots.
Volume size: In general, there are no noticeable performance differences in volume sizes. Consider using
fewer larger-sized volumes to reduce administration overhead. In Oracle 11gR2, ASM supports volume sizes
up to 2 TB. In Oracle 12c, it is drastically increased to 32 PB. SCOS supports up to 500 TB for a single
volume.
Storage profile: Data Progression moves data between RAID levels and storage tiers based on the storage
profile assigned to each volume. This includes both active data blocks and frozen snapshots so performance
and capacity are balanced and optimized automatically. See section 3.3.3 for more information.
Snapshot profile: It is recommended to create one consistent profile for each database and assign it to
volumes belonging to the same database. See section 3.3.2 for more information.
Data reduction feature: Depending on the type of data the database holds, deduplication and compression
or just compression might provide additional storage savings. Since the features can be enabled at any time,
they can be enabled after the migration. Monitor the space savings in DSM after the Data Progression cycle is
run. For OLTP-type environments, data reduction should be tested to gauge the user acceptance of
performance.
The disk space savings information can be found in DSM > Storage Tab > Volumes > Statistics.
Data reduction savings information in DSM