Information Technology Reference
In-Depth Information
One special type of agent is the Virtualization Controller (VC), which runs
on an asset to manage the life cycle of VEs on that computer. Currently, Ops
Center manages Containers and Logical Domains, the VEs of Oracle VM Server
for SPARC. To manage Containers, the VC runs on Solaris 10 in the global zone.
To manage Logical Domains, the VC runs in each control domain. If a domain has
Containers, a VC runs in the system's control domain and another VC runs in the
domain's global zone to manage its Containers.
This section describes two concepts that are specific to Ops Center.
9.3.2.1 Library
Ops Center uses NAS and SAN storage for collections of disk images (that is, an
operating system installation disk) and virtual machine images. The latter can be
booted or can be used as a golden master image from which other virtual machine
images are created. Libraries are sometimes called storage libraries.
9.3.2.2 Virtual Pool
Although a primary goal of Ops Center is the simplification of a repeated opera-
tion performed on many systems in a data center, it provides other functionality
as well. One example is virtual pools.
A virtual pool is a set of VEs configured to run on a specific set of systems. With
this feature, you can enable Ops Center to manually or automatically rebalance
the VEs across the systems. The workloads deployed in a pool can be related or
unrelated. In Ops Center 2.5, a virtual pool must consist of SPARC CMT systems.
Logical Domains can be members of a virtual pool.
Creating a VE in a pool adds it to a library of shared VEs. Its disk content will
reside on shared storage, where it is available to all physical members of the pool.
NAS is typically used as the shared storage method in such a case.
Yo u c a n c o n fi g u r e a V E t o b e a m e m b e r o f a p o o l . W h e n s u c h a V E b o o t s , O p s
Center automatically boots it on the least-loaded or least-allocated VP node. You
choose which of those placement policies will be used to determine the new home
for the VE. “Least-loaded” means “having the lowest CPU, memory, and network
utilization.” The configuration with the smallest assignment of CPU and memory
resources is “least-allocated.”
Ops Center also provides a feature that manually rebalances running VEs in a
pool. To achieve this outcome, Ops Center determines the best new configuration
based on the placement policy you select and the recent usage patterns of CPU,
memory, and network usage.
The third load-balancing method is very similar to the manual rebalanc-
ing just described. However, instead of requiring user interaction, Ops Center
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