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What is Virtual Environment (VE)?
| VE behaves exactly like an isolated stand-alone server |
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Appears to have its own processes, users, files and provides full root access |
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Each has its own IP addresses, port numbers, tables, filtering and routing rules |
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Each could have its own configuration files for the system and app software |
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Each could have its own versions of system libraries or modify existing ones |
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Each could delete, add, modify any file, including files in /root, and install its own application software or custom configure/modify root application software |
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Example: In Linux case multiple ?distributions? can be ran on the single box. |
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Quality of Service to provide dedicated SLAs for each VE
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Standard: Includes CPU, disk space and network guarantees
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Unique: Guarantees on memory - user and kernel, physical and virtual
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Unique: Guarantees on disk I/O and many other critical resources (over 20).
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VE runs off-the-shelf software without any changes
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