Friday, 25 April 2014

virtual box and its advantages,disadvantages and features

b)VirtualBox
It is an X86 virtualization package which is now maintained by Sun Microsystems.
Virtual Box is a powerful virtualization product for enterprise as well as home use.It is not only an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL) version 2.
Presently, Virtual Box runs on Windows, Linux, Macintosh, and Solaris hosts and supports a large number of guest operating systems.
Features of VirtualBox
Portability
 VirtualBox runs on a large number of 32-bit and 64-bit host operating systems To a very large degree, VirtualBox is functionally identical on all of the host platforms.It uses same file and image formats.This allows you to run virtual machines created on one host on another host with a different host operating system; for example, you can create a virtual machine on Windows and then run it under Linux.
No hardware virtualization required
 For many scenarios, VirtualBox does not require the processor features built into newer hardware like Intel VT-x or AMD-V. As opposed to many other virtualization solutions, you can therefore use VirtualBox even on older hardware where these features are not present.  
Guest Additions
 The VirtualBox Guest Additions are software packages which can be installed of supported inside guest systems to improve their performance and to provide additional integration and communication with the host system. After installing the Guest Additions, a virtual machine will support automatic adjustment of video resolutions,accelerated 3D graphics and more.  
Guest multiprocessing (SMP)
VirtualBox can present up to 32 virtual CPUs to each virtual machine, irrespective of how many CPU cores are physically present on your host.
USB device support
 VirtualBox implements a virtual USB controller and allows you to connect arbitrary USB devices to your virtual machines without having to install device-specific drivers on the host. USB support is not limited to certain device categories.
VM groups
 VirtualBox provides a groups feature that enables the user to organize virtual machines collectively, as well as individually. In addition to basic groups, it is also possible for any VM to be in more than one group, and for groups to be nested in a hierarchy. In general, the operations that can be performed on groups are the same as those that can be applied to individual VMs i.e. Start, Pause, Reset, Close.
Advantages of VirtualBox
·         Snapshots
·         64-bit
·         Shared folders
·         Special drivers and utilities to facilitate switching between systems
·         Command line interaction (in addition to the GUI)
Disadvantages of VirtualBox
o    Poor performance with 32-bit guests on AMD CPUs. This affects mainly Windows and Solaris guests, but possibly also some Linux kernel revisions. Partially solved in 3.0.6 for 32 bits Windows NT, 2000, XP and 2003 guests. Requires 3.0.6 or higher Guest Additions to be installed.
o    Mac OS X guests can only run on a certain host hardware.
o    VirtualBox does not provide Guest Additions for Mac OS X at this time.
o    There is no support for USB devices connected to Solaris 10 hosts.
o    No ACPI information (battery status, power source) is reported to the guest.

o    No support for using wireless adapters with bridged networking.

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