期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2015
卷号：4
期号：5
页码：2096-2100
出版社：Shri Pannalal Research Institute of Technolgy
摘要：Disaster means any event that brings down the system. Disasters may be human made or natural disasters. Human made disasters like power outage, cyber security attacks and when several people access some particular web site at the same time causes software corruption. Natural calamities like storm, cyclone, typhoon, earthquake, Tsunami and floods may cause hardware disasters in turn software also. When a physical server fails we can back up the data from virtual machines but what to do when virtual machines also goes down because although the virtual machine is decoupled from the hardware, it is still dependent on the working of the hardware. By having a replica of virtual machine we can get back our data and brings system back to normal working. Replication means copying data between two or more storages to prevent data loss in case of disasters. Replication can be synchronous or asynchronous. We are adopting asynchronous replication because it works over wide range.
