An Efficient Snapshot Protocol for Mobile Computing Environment

The Number of hosts associated to the internet is growing at increasing speed & it is expected that increase in number of these devices will be wireless, hence mobile in nature. The devices may include laptop computers, digital cellular phones, PDAs & many other classes of devices. Due to mobility change between subnets will break any connections that were present in the previous subnet.  These devices have reserve constraints in terms of limited bandwidth, limited & vulnerable MH Local storage, and frequent disconnection/connections. Limited power, cost to locate MHs. Hence it is highly recommended that for effect of mobility on snapshot intervals, movement based snapshot should be considered. This paper focuses on the design issues of such snapshot algorithm so that at the time of failure only failed processes rollback & restart from their respective latest  snapshots ,independent of others, hence reducing the relocation & recovery cost.