Virtual point in time access

Assaf Natanzon, Eitan Bachmat

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Continuous Data Protection or CDP is a method for capturing all changes occurring to a storage device, allowing fine granularity restore of objects from crash consistent images. In this paper we introduce a method for creating a virtual image of a block storage device,using a CDP journal log and an image of the device at one point in time. The creation of the disk image for any point in time is created on demand. The creation algorithm is very efficient and takes only a few minutes for multiple TeraBytes of changes. The algorithm for creating the image can be formalized as a map/reduce algorithm and can be parallelized easily over multiple machines to reduce the creation time. The creation on demand of the virtual image using journaling methods, minimizes the effect on the production volumes, allowing the use of CDPs for enterprise class applications.

Original languageAmerican English
Title of host publicationProceedings of the 6th International Systems and Storage Conference, SYSTOR 2013
StatePublished - 26 Aug 2013
Event6th Annual International Systems and Storage Conference, SYSTOR 2013 - Haifa, Israel
Duration: 30 Jun 20132 Jul 2013

Publication series

NameACM International Conference Proceeding Series


Conference6th Annual International Systems and Storage Conference, SYSTOR 2013

All Science Journal Classification (ASJC) codes

  • Software
  • Human-Computer Interaction
  • Computer Vision and Pattern Recognition
  • Computer Networks and Communications


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