Hi, On Sunday 08 February 2015 20:49:33 Thouraya TH wrote: > Please, i ask if there is a paper which present statistics about the size > of snapshots (dumping) with virtualBox ?
such statistics do not exist. The space occupied by a VirtualBox snapshot depends on the guest operating system. If the VM was powered on while doing the snapshot, a saved state is created which reflects the VM state at this time. It's size is mainly defined by the amount of RAM which is assigned to the guest OS. The saved state is compressed. If the VM was powered off, no saved state is created. The other part of the space occupied by a snapshot is defined by the differential images which are created for all attached virtual hard disks. Every sector written after the snapshot is created goes to the differential image. The more data the guest writes the more space is occupied by the differential image. In the worst case, every differential image occupies as much space as the corresponding base image. Frank -- Dr.-Ing. Frank Mehnert | Software Development Director, VirtualBox ORACLE Deutschland B.V. & Co. KG | Werkstr. 24 | 71384 Weinstadt, Germany Hauptverwaltung: Riesstr. 25, D-80992 München Registergericht: Amtsgericht München, HRA 95603 Geschäftsführer: Jürgen Kunz Komplementärin: ORACLE Deutschland Verwaltung B.V. Hertogswetering 163/167, 3543 AS Utrecht, Niederlande Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697 Geschäftsführer: Alexander van der Ven, Astrid Kepper, Val Maher _______________________________________________ vbox-dev mailing list [email protected] https://www.virtualbox.org/mailman/listinfo/vbox-dev
