Information Technology Reference
In-Depth Information
•
Resources may be transferred between the nodes with the use of:
- direct connections between the neighbouring nodes,
- between two optional nodes with the use of bus (network), however, with the
lower efficiency than between the neighbouring nodes.
•
The quantity of the resource in individual nodes varies. The resource in a given
node is produced with varied intensity and similarly consumed, however, both
processes change independently of each other. The intensity of production is not
known (and its changes in time), nor is the intensity of consumption.
For each node the minimum (
r
min
t
T
) and the maximum (
r
max
t
•
for the node
t
∈
for
the node
t
∈
T
) quantity of resource which can be held in each node is specified.
•
In the environment there is not any centre which would store any information about
the quantity of the resource in individual nodes. Information about the quantity
of the resource in a given node may be accessible locally and sent, if necessary,
between the neighbouring nodes.
As was mentioned in the beginning, the system is responsible for keeping (as
much as it can) the quantity of the resource in each node within certain limits
(
r
min
t
r
ma
t
).
The task presented in this general formmay be a model for the real problems with
the division of resources such as:
≤
r
t
≤
•
distribution of products on the market in economic instability and changes in
demand and supply;
•
control of the scattered operation system under changing conditions of operation
and demand;
•
division of tasks in multiprocessor systems in irregularly appearing different types
of calculations;
•
control of the realization of operations in multi-server systems SOA;
•
division of different kinds of resources in scattered structures
cloud
.
The method for solving a problem of balancing the resources is a transfer of an
appropriate quantity of a given resource between the nodes which have been chosen
in the way that one has an underflow of the resource and the other has an overflow.
The task of the agent system comes down to the search for appropriate nodes—the
sender and the receiver.
For the purpose of realizing this task, the agent system is dedicated. That system
includes agents placed in the nodes of a graph and capable of relocating between
these nodes.
4.3 Agent System
In order to define the agent system, apart from the environment described above, it
is necessary to specify:
