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The ability to directly modify a virtual machine's hard disk from a host server supports many applications, including: Moving files between a VHD and the host file system; Backup and recovery; Antivirus and security; Image management and patching; Disk conversion (physical to virtual, and vice versa) Life-cycle management and provisioning (re)
Resizing of disk image formats from Oracle, VDI (VirtualBox disk image), and Microsoft, VHD (Virtual PC hard disk) 4.1 Jul 19, 2011: Windows Aero support (experimental) Virtual machine cloning; 4.2 Sep 13, 2012: Virtual machine groups – allows management of a group of virtual machines as a single unit (power them on or off, take snapshots, etc.)
Live migration, also called migration, refers to the process of moving a running virtual machine (VM) or application between different physical machines without disconnecting the client or application. Memory, storage, and network connectivity of the virtual machine are transferred from the original guest machine to the destination.
A flat image allocates space ahead of time while a sparse image grows as the virtual machine writes to it. Flat images can use the underlying file system's sparse file capability, as is done with the vmfs format on ESXi. An image can also refer to a parent image and only store changes made in a copy-on-write fashion. This enables creating a ...
Oracle's Virtual Box has a Linux-based tool which allows the conversion of a dd image of an existing hard drive; Microsoft provides the SysInternals disk2vhd utility for making images from Windows XP or later systems to be used with Windows Virtual PC, Microsoft Virtual Server or Hyper-V.
Traditionally, UNIX platforms called the kernel image /unix. With the development of virtual memory , kernels that supported this feature were given the vm - prefix to differentiate them. The name vmlinux is a mutation of vmunix , while in vmlinuz the letter z at the end denotes that it is compressed (for example gzipped ).
The first widely available virtual machine architecture was the CP-67/CMS (see History of CP/CMS for details). An important distinction was between using multiple virtual machines on one host system for time-sharing, as in M44/44X and CP-40, and using one virtual machine on a host system for prototyping, as in SIMMON.
Accept the data and to store the data as a file at the server site STOU RFC 959 Store file uniquely. STRU RFC 959 Set file transfer structure. SYST RFC 959 Return system type. THMB Streamlined FTP Command Extensions: Get a thumbnail of a remote image file TYPE RFC 959 Sets the transfer mode (ASCII/Binary). USER RFC 959 Authentication username. XCUP