by November 2, 2007 0 comments

Virtual machines have become ubiquitous and are being used for various
purposes ranging from running mission critical applications to testing. With
time and usage, the size of virtual machine starts increasing and then comes the
problem of increasing the size of its hard disk. This problem can be solved by
using Parallels Compressor Server-a disk management tool, which can reduce the
size of virtual disks and clean unnecessary files present on the virtual disk.
It can be used on virtual machines created in VMware Workstation, VMware GSX
server, Microsoft Virtual Server and PC, and ‘Parallels Workstation ‘

This tool can either be installed on the host operating system or inside the
virtual machine. If you are running multiple virtual servers on a single
machine, it is recommended that you install it on the host operating system.
This is because then this tool can be used by all virtual machines running on
the host OS. One can install it on Windows 2003, 2000, XP, 2003 x64, XP x64, and
major flavors of Linux. However, if you are installing it on the guest OS then
it only supports Windows.

Direct Hit!
Applies To:
IT managers
Price: $179

Compress virtual disks of VM

Primary Link:

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Virtual machine

How to use?
Installing this management tool is simple. Once you’re through with its
installation then you will find a ParallelsCompressor.iso image file on the
location where you’ve installed the software. Now, go to the settings of the
virtual machine that you want to compress, and in its CD/DVD option specify this
image file. To do this in VMware workstation, go to ‘Virtual Machine Settings’
option and select CD-ROM. Now choose the ‘ISO image’ option and click on
‘Browse’ button to specify the location of the ISO image. This image will be
visible in virtual machine’s CD/DVD-ROM drive. Double click to open the image,
click on ‘Manual mode’ button and this will start the ‘Parallels Compressor
Wizard.’ It will automatically detect the type of VM and OS running on your
virtual machine, and will then ask you to select the mode of compression. Select
the ‘Advanced compression’ option. Next, the wizard will detect and list virtual
hard disks present in the virtual machine i.e. the virtual hard disks created
during the creation of VM and not the real ones. Select the hard disk that you
want to compress, click on ‘Next’ and then choose the compression level.
Parallels Compressor supports three compression levels: low, high, and medium,
and in each level certain VM optimization tasks are performed. You can simply
select the compression level by moving the slider. You can also select the tasks
which you want to be executed during compression. Select the compression level
and click on ‘Compress’. After the first step, the virtual machine restarts and
compression resumes. But before the process is resumed, a pop up message will
ask if you want to continue. Click on ‘Yes to continue,’ and you’re done.

Parallel compressor lets you
decide which tasks should be execu- ted at the time of compression & choose
the level of compression

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