VSD: A Framework of Stackable Virtual Snapshot Device

Author

Wen-wu, Na ; Xu-dong, Zhu ; Jian, Ke ; Jin-ping, Xu ; Zhang Jun-wei ; Qing-zhong, Bu ; Lu, Xu

Author_Institution

Inst. of Comput. Technol., Chinese Acad. of Sci., Beijing, China

fYear

2009

fDate

9-11 July 2009

Firstpage

253

Lastpage

256

Abstract

On demand of various applications for storage virtualization, this paper presents a stackable block-level virtual snapshot device (VSD) based on the virtual storage pool. With the strategy of stackable block device, VSD employs a read-only snapshot model with serial connection, and a tree model mixed with serial and parallel connection for writable snapshot. Moreover, two data updating schemes, Copy on write and realloc on write, are integrated into VSD. Thus, VSD supports various applications such as data backup and recovery, data version management and volume clone and so on. Finally, the storage requirements and I/O performance of VSD are evaluated.

Keywords

read-only storage; virtual storage; copy on write; data updating scheme; read-only snapshot model; realloc on write; stackable block device; storage virtualization; tree model; virtual snapshot device; Application software; Application virtualization; Cloning; Computer architecture; Computer science; File systems; Image storage; Mirrors; Paper technology; Space technology; copy-on-write; realloc-on-write; snapshot;

fLanguage

English

Publisher

ieee

Conference_Titel

Networking, Architecture, and Storage, 2009. NAS 2009. IEEE International Conference on

Conference_Location

Hunan

Print_ISBN

978-0-7695-3741-2

Type

conf

DOI

10.1109/NAS.2009.78

Filename

5197334