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Ijrar january 2019, Volume 6, Issue 1Bog'liq A Comparison Analysis of Fog And CloudV.
C
LOUD VS
F
OG
C
OMPUTING
Table 1 shows the technical differences between the cloud and the Fog. Surely we cannot say that the Fog is replacement of the
Cloud. Definitely, it cannot be said that the Fog can replace the cloud. Also we cannot say that Fog is better than Cloud or Cloud is
better than Fog as they both contribute differently by fulfilling different perspectives and requirements.
Table 1. Technical difference between Fog and cloud [9]
Sr. No.
Cloud Computing
Fog Computing
1.
Cloud servers centralized and may far from end users.
Fog nodes are closer to the end users
2.
Cloud computing requires powerful server systems.
Fog nodes may be any devices with computing power.
3.
They are having centralized cloud servers.
Fog devices may be centralized or distributed.
4.
Storage and computation capacity are very high.
They are having low computing and storage capacity.
5.
Not mobile device, so it has very less mobility support.
Fog devices supports higher mobility.
6.
Tasks execute on cloud have more latency as they are far
from client location.
Tasks executing on fog nodes have lower latency, as
the nodes are closer to the end users. So fog computing
is used in latency-aware applications.
7.
Cost for computation, hardware and network are high.
Hardware and computation cost is very low.
8.
Data processing done at the remote servers so not much
useful for real-time applications.
Processing and storage done at the edge of the network
(closer to source), so very useful for real-time
applications.
9.
Higher computing capabilities and storage capacity.
Lesser computing capabilities and storage capacity
then cloud.
10.
Clouds are less secure than fog.
Fog is more secure then cloud as fog is having
distributed architecture.
11.
Network issues and interruption may occur as its internet
based system and costumer may face downtime because of it.
No downtime in fog computing which improves
quality of service for customers.
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