Banker’s Algorithm in Operating System
It is a deadlock avoidance algorithm that states that the name was chosen because the bank never allocates more than the available cash.
Available: A vector of length indicates the number of available resources of each type. If available [ j ]= k, there are k instances of resource type Rj available.
Max : An nxm matrix defines the maximum demand of each process. If max[ i,j ]=k, then Pi may request at most k instances of resources type Rj.
Allocation: An nxm matrix defines the number of resources of each type currently allocated to each process. If Allocation [ i,j ]=k, then process Pi currently allocated k instances of resources type Rj.
Need : An nxm matrix indicates the resources need of each process. If Need [ i,j ]=k, then Pi may need k more instances of resource type Rj to complete its task.
Need [ i,j ]= Max [ i,j ] - Allocation [ i,j ]