A computer cluster for providing hosting services includes a plurality of nodes, and a control center coordinating activity of the nodes. Each node includes a plurality of virtual environments such that each virtual environment responds to user requests and appears to the user as having its own operating system. Multiple virtual environments running on the same node share the same host operating system of the node.

 
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< Method for initializing a random access memory

> Graphical user interface for creating a customized storage layout for an application

> Memory device with preread data management

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