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Parallels Compressor Basics

Parallels Compressor is a special utility that helps you keep your virtual machine compact and efficient. It cleans up the unused space on the virtual hard disk, thus reducing the size of your virtual hard disk file (.hdd) stored on the physical computer.

Parallels Compressor can run in one of these modes:

By default, Parallels Compressor runs in the Express mode.

Compression Levels

In the Advanced mode, Parallels Compressor supports three levels of compression: Low, Medium, and High. Each level suggests the execution of certain tasks. In the Parallels Compressor wizard, the task levels are indicated by different colors: red High_Level is used for high-level tasks, yellow Medium_Level for medium-level tasks, and green for low-level Low_Level tasks.

Tasks performed when the Low level of compression is selected include:

Tasks performed when the Medium level of compression is selected include:

Tasks performed when the High level of compression is selected include:

When you use Parallels Compressor in the Express mode, your boot volume is defragmented and compacted only. To customize the list of tasks and perform more intesive cleanup of your virtual disks, use the Advanced mode.

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