2.5

n
Determine the size of the backup storage allocation to support the external backups for each database in
the database group plus the Point-in-Time Recovery allocation for each database.
Storage Reservation
Organization administrators use storage reservation to control whether they can allocate more storage than is
available to databases in a database group. Administrators set a limit on how much storage can be
overallocated.
Storage reservation determines the percentage of the total database storage allocation that is initially committed
to the database group. The storage is reserved, although it is not used yet.
For example, if the organization administrator sets database storage at 100GBs and storage reservation at 20%,
a total of 500GBs is allocated for all databases in the database group. If a user then creates one database in the
group, the single database can allocate up to 500GBs of data storage but commit 100GBs. If a user instead
creates five databases in the group, each database can allocate up to 100GBs of data storage but can commit
20GBs. You cannot add more databases to the group because all 100GBs are committed. For example, 500GBs
are allocated, 100GBs are the capacity, and 400GBs are over allocated.
In practice, data storage is always less than the maximum 500GBs, because total allocation includes space for
overhead for the operating system, bin, snapshots, and so on.
Database Groups and Security
Role-based access control and direct user permissions form the security policies that determine which users
can access particular database groups and the actions that the users can perform. Database groups inherit
security policies from their organizations.
Organization administrators define the security policies for their organization, including user roles,
permissions, and privileges.
For example, an organization administrator creates a user role with permissions on database groups. These
permissions include create database, take database snapshots, and start or stop database. Those roles and their
associated permissions apply to each database group within the organization, and to each database within
each database group.
Chapter 3, “Managing Users and Roles,” on page 27 discusses the Data Director security model and explains
how you can use roles for fine-grained permission management.
Create a Database Group
Database groups contain sets of databases within an organization. Database groups enable grouping related
databases and provide efficient use of resources needed to provision and operate databases.
Prerequisites
n
Verify that at least one resource bundle is allocated to the database group's organization. See “Create a
Resource Bundle,” on page 24 if no resource bundle is available.
n
Verify that at least one base DB template is enabled in the organization.
n
Log in as an organization administrator or have permissions to create or modify database groups.
Procedure
1 Click the Manage & Monitor tab.
2 Click the Database Groups tab.
3 Click the plus (+) icon to create a database group.
Chapter 7 Managing Database Groups
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