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Adding resourcesThe most important part of VMImage is adding additional memory or hard disk or even CPU. You add these resources only when the Image is shutdown. This can be done from the VM settings.
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From the Hardware Tab you can add resources to it, like Memory can be increased to 1024 mb which is by default 384 MB. You can even allocate two processors to your VM Machine if your host machine is capable of supporting this. This option of adding additional Processor was very useful for me. As we were doing Japanese Testing and our application was such that with single CPU it was using 100% CPU. This resulted in VMImage being very slow. So we just shutdown the VM Image and through the VM->Settings we just changes the Number of processors from one to two, then restarted the Virtual Image. And
Great!!!! It was running smoothly.
You can also add additional Hard Disk by Clicking on Add it will add new hard disk just specify size as 4 GB or anything that you want. This is just one part now Power on the VMImage. After you have logged on to the VMImage Go to Control Panel ->Administrative Tools->Computer Management->Disk Management. There you will see the newly added Hard disk listed on the right side. Select that Disk and R-Click Format. Once you have formatted it then restart the VMImage. Now this Hard Disk will be visible in My Computer.
Snapshots:
A snapshot is a frozen image
of your virtual OS at any
particular point of time.
This feature is very useful
for backups. In my case,
when I had setup the entire
Japanese Environment by
installing the SQL Server
2005 Japanese and Sun Java
System Application server
9.1 Multi language. The
application was up and
running I created a snapshot
for this. Snapshots enable a
tester to return to last
stable environment if
anything goes awry. You
can create snapshots only
when the Vmimage is Powered
Off. The snapshot created is
saved in the same folder as
your VMImage. You can just
revert to snapshot if your
setting gets corrupted. This
saves time of the testers of
uninstalling and installing
or setting the corrupted
environment right.
Replicating The EnvironmentOnce a VMImage is created it is a ‘Reusable Asset’. I had Created a Japanese VMImage and used the same for different databases. The Environment can be replicated by just copying the VMImage from one machine to another. Copy a VMImage from one machine to another. When you will power on this VMImage it will give a message that the Image is being copied so do you want to create a new identifier. Just say yes. Now this VMImage works fine on any machine. The same environment can be replicated on any number of machines simply by copying, which otherwise would have taken hours or even days.
Hope this will help you
in using VMImages and
improve your productivity.
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