2.5

Table Of Contents
You can also enable expandable CPU and memory. See “Create the System
Resource Pool,” on page 21.
CAUTION Data Director can use only resource pools for creating databases if the corresponding cluster is
enabled for DRS and HA. Do not disable DRS. If you do, Data Director cannot use the resource pools even if
you reenable DRS. See “Resource Bundles Become Unusable Because DRS Is Disabled,” on page 188.
Resource pools allow you to group available CPU and memory resources. You can allocate resources explicitly,
or use the resource pool share mechanism. You can hierarchically partition available CPU and memory
resources by grouping resource pools into hierarchies. You can allow different organizations access to different
resource pools. For example, a QA department might need large amounts of CPU and memory for running
tests while the marketing department might require smaller amounts.
Data Director expects you to group the hosts that provide the CPU and memory resources into clusters. Each
cluster owns the resources of all hosts. You can create one or more resource pools for the cluster, which has an
invisible root resource pool. Each resource pool owns some of the cluster's resources. If necessary, you can
create child resource pools. Child resource pools represent successively smaller amounts of CPU and memory.
CAUTION To use Oracle with Data Director, create a cluster specifically for Oracle use. To avoid licensing issues,
assign only resources from your dedicated Oracle cluster to organizations that create and provision Oracle
databases and DBVMs.
How you allocate CPU and memory resources to database groups differs from how you allocate those resources
to databases.
Creating Resource Pools for Databases
You create resource pools for databases by using a vSphere Client connected to a vCenter Server system. Specify
the following resource pool settings to ensure that Data Director always receives all of its allocated resources
and does not have different amounts of CPU and memory available if the cluster is experiencing a light or a
heavy load.
NOTE If you do not configure your resource pool with these settings, problems with resource bundle creation
or other Data Director tasks might result. Resource pools with incorrect settings do not appear in the list of
available resource pools when you create a resource bundle.
Set the Limit equal to the
Reservation.
If the system never allocates more resources than you reserved, you do not
experience resource fluctuations.
Set Expandable
Reservation to checked
or unchecked.
If the system does not attempt to allocate more resources than you reserved,
you do not experience resource fluctuations.
Set Unlimited to
unchecked.
Data Director requires this setting to avoid a resource bundle taking more than
its share of the resource pool.
After you create the resource pool, you create resource bundles. Each resource bundle uses one resource pool.
See “Create a Resource Pool,” on page 23 and “Create a Resource Bundle,” on page 24.
Chapter 2 Managing Data Director Resources
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