An Adaptive Data Placement Architecture in Multicloud Environments

Table 2

Symbol table.

Symbols	Descriptions
	List of data centers
	Total number of data centers
	Storage price of data center
	Out-bandwidth price of data center
	Operation price of data center
	Location of data center , which contains latitude and longitude
	Number of time slots
	The data access frequency at time slot
	The required availability
	The required data retrieval latency
	The parameters of erasure coding
	Size of the data object
	Data placement solution at time slot
	The availability of the solution of time slot
	Storage cost of a solution at time slot
	Network cost of a solution at time slot
	Operation cost of a solution at time slot
	The sum of storage cost, network cost, and operation cost at time slot
	The migration cost
	Data centers for data retrieval at time slot
	Data retrieval latency at time slot
	The candidate data placement solutions
	The optimal data placement during