SnapCDP : A CDP System Based on LVM

Continuous Data Protection (CDP) is a kind of data protections technology with continuous recovery time points. It can resume data to the historical states as quickly as possible. Compared with traditional technologies, CDP can supply more flexible Recovery Point Objectives (RPO) and more actual Recovery Time Objectives (RTO).In this paper, a CDP system, named SnapCDP, is presented. SnapCDP embeds the continuous data protection mechanism into the Logical Volume Manager (LVM). The cycle-replace strategy for time point and meta data is used in SnapCDP. The experimental results show that SnapCDP can recovery the data to any time point which users set in advance with low storage space.

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