There's a lot of talk these days about "green data centers" and reducing power consumption. Cassatt Collage has several features that can be used to optimize the power consumption of your data center.
Collage dynamically allocates servers to applications as they are needed. So, if you have a farm of web servers, you can allocate capacity as demand increases rather than provisioning all the servers at once. Servers that are unused remain in a free pool, and Collage powers them off. (Check out an older post for more details.)
Collage includes a pretty powerful rules engine, sometimes called the brain, and sometimes called Jerry's brain (named after its inventor). The rules engine allocates servers using a least-cost algorithm so that servers are optimally allocated based on application needs. For example, you might have a database tier that need dual-CPU, 4 GB servers, and an Apache tier that can use any old server. Collage will allocate your heavy-duty servers to the database tier and the lightweight servers to the Apache tier.
Using the Collage rules engine and power management technologies, you can have servers allocated based on their power consumption. For example, virtual machines could be allocated first-- since they don't require additional power-- followed by 1-U servers, then 2-U servers and then finally those power-hungry 4-U servers. For each class of server, you simply add additional attributes to the hardware inventory maintained by Collage. Add one attribute for your 1-U servers, two attributes for your 2-U servers and four attributes for your 4-U servers.
When servers are allocated to an application tier, Collage will automatically allocate the most power-efficient server that is available. And when that application no longer requires the same service capacity, extra servers are automatically returned to the free pool and powered off. Voila! Your data center now optimizes its own power consumption based on application needs. Pretty cool, huh?