An investigation into convergence of Networking and storage solutions

1. An Investigation into Convergence of
Networking and Storage Solutions
Data Storage and Management
MSc Cloud Computing
Blesson Babu
15029468
Project A
ABSTRACT: As in the present era of the growing
market for the Network and Storage is the result of huge
growing demand for the storage capacity as there is a
steep increase in the internet dependent world and due to
its tight labour market. In this paper an investigation is
made into theconvergence of the networking/storage
solutions and thus, we will be making thecomparing the
alternative networking/storage technologies and thus, for
the utilization of the resources in an efficient and
effective manner.
INTRODUCTION: As in present scenario the internet
applications will be requiring the underlying networks so
as to be fast, ability to carry the traffic and hence in
deployment of number of distinct, dynamic applications
and their services. As due to the advent of cloud
computing as many of the business paradigms are
encountering in the potentialchanges such that the ability
in eliminating the IT infrastructure maintenance process.
As the new concepts have been induced into the cloud
model such as software-defined networking (SDN) and
the network function virtualization (NFV). Software
defined network is aimed in the transforming theway the
network would be functioning. The SDN terms to be
beneficial in a multitude of the environments such as the
data centres, data centre network and Network as a service
offered. As theadvantage theNetworked storage is useful
in reducing the wasted capacity and hence the time taken
in deploying the new storage and hence there is
inconveniences backup and thus, it also useful in
simplifying the management, increasing the data
availability and hence, it is helpful in enabling sharing of
the data among the clients. The core concept of the SDN
is the separation of the control of network and data plane.
PURPOSE: In theterms of real time scenario has thereal
time performance and the high availability requirements
these modern technologies have been induced such that
the telecom networks are adopting the new concepts for
the cloud model that is the software defined network
(SDN) and thenetwork function virtualization (NFV). As
theSDN and NFV[1] are thecomplementing technologies
such that they do not depend on each other. The purpose
of the Networked storage [2] is that it useful in reduction
of the wasted capacity and the time taken so in deploying
the new storage and the inconveniences in the backup. It
turns useful in reducing thewasted capacity of the pooling
devices and the unused capacity thus, spreading directly
attached storage servers. It is useful in reducing the
wastage capacity of the pooling devices and such that
consolidated unused capacity is thus, spread over the
direct attached storage servers. It is useful [2] in the
reduction of the time in deploying the new storage, as the
client is so designed so as to tolerating the dynamic
changes in the network resources as the changing of the
local storage operations while the client is operating. As
the data backup traditionally [2] occupies the application
dataservers and thehosts such that they areis a significant
inconvenience for the global and organizations always
open. As theprincipledisadvantage in thenetwork storage
is due to theincrease in the complexity of the systems that
is spread across the network as much themachines have a
function properly so as to increase the complexity of the
systems that is spread across the network.
Real Aspects: As the real concept of SDN transport
mechanisms [3] in thetelecommunication has been
useful so in creating market driven applications thus, by
reusing the components of the services that are already in
the existence. The main methodology used in theconcept
so as taken by theresearch and development community
such that their objective in achieving the idea of
separating the service related mechanisms from the data.
The Network infrastructureis so virtualized and thus, it
shares he service related functions so as the creation of
the various applications. Virtualization is said to be
essential in thetelecommunication domain. The main
objective of SDP (Software Designed Platform) [3] such
that providing theenvironment such that the upper layer
applications could be easily developed by the
combination of the network capabilities and thus,
collaborating with thenetwork service providers, content
providers and thethird service providers. The SOA plays
a crucial role in the principleand web services as the
technologies playing thekey role facilitates virtualization
in the telecom systems.
CloudData Storage and Management: TheCloud
technology [5] is the kind of the computing model such
that the development of thedistributed processing,
parallel processing and thegrid computing such that the
cloud computing regards the computer as the virtual
resource poolthus, it makes the huge data processing of
the amount possible. The HDFS[5] could be deployed
on the cheap hardware so it would be able to store huge
amounts of thedata it is high fault tolerant and reliability.
As comparing thetraditional storage technology such
that the cloud computing storage is not only for the
hardware such that thecomplexity of the systemis of the
multiple parts. Thesystemso based on the storage
equipment such that it provides theservices for accessing

2. business and data storage for some application software.
Figure: Data processing System [5]
SDN BASED CLOUD ENVIRONMENT: SDN is said
to sorting of theprogrammable network such that the
behaviour of the network so thebehaviour of the
networking devices and such that the flow control will be
handled by the software[4] it will be operating from the
network hardware. SDN architecture is useful in
decoupling the control and hence forwarding theplanes
such that controlling and forwarding the planes such that
permitting the programs up and down the disk. Theopen
flow switch [4] is the hardware or softwaresuch that the
Open flow protocolhas been implemented. The SDN
paradigm is hereby constructed keeping in view
connecting thecomputing devices to the open flow
switches. The open flow switch and the controller
communicates with theopen flow protocolthat defines
the message such as they contain packet-received, send-
packets and thus the modification of the forwarding table
and thus, getting their stats.
The Open-flow switch possess thefour parts [4]:
 The flow table consists the set of flow entries
such that each of the flow entry consists of the
match fields, counters and the set of
instructions applied for the matching packets
 Secure channel the interface connects theopen
flow switch to thecontroller
 Open flow protocolit hereby where the
controller adds, updateand delete flow entries
in flow table in respect to add, updateand
delete entries in flow table responseto the
packets.
 The group table will be consisting set of the
flow of entries
Figure: Open Flow Control [4]
The entry in theflow table consisting of set of the flow of
entries the packet header defines theflow for instance of
the TCP port 80 traffic, action defines the packet
processed and thestatics number of packets and the bytes
for each flow. The background knowledge is such that
the SDN [6] increases theoperational efficiency of the
cloud data centres such that theinternet service providers
and the telecommunication operators such that theSDN
increases the efficiency usefulness in addressing the
problems. As in the case [6] theopen flow, an SDN
architecture such that enabling the networks in evolving
allowing the remote controller so as modifying the
network devices as well defined interface and control.
RESOURCE MANAGEMENT SCHEMA: In the
case of theresource management architecture [6] such
that the allocation of the resources such that scheme
determines theslices such that it would be re-allocating
the resource so as to meet theservice requirements such
that the flow visor and flow visor it applies theslicing
policy such that configuring the enterprisenetwork. The
configuration is met so as it could be adjusted so as to
meet the network and service status. Thenetwork
virtualization [6] could be achieved so in controlling of
the packets such that therouting and load balancing, thus
activating unused wires so as to share theload. The flow
visor is hereby, enforcing isolation between each slice
such that possessingits network resources. SDN [6] is
widely implemented is the networking approach due to
the tremendous approach of thepotentialthus, it is
characterized by the programmability, network control
and virtualization. The enterpriseengine and theflow
visor is adjusted to meet thenetwork and service status.
Figure: Proposed Network Management Architecture
[6]
This proposed architecture turns useful for the SDN as
resource management can be effectively adjusted in
cloud based environment.
Methodology:
Software DefinedNetwork: SDN is thenew networking
paradigm that gained lot of momentum in terms of the
computing and theresearch. As themajor key concept of
SDN [7] is the separation of the data plane from the
control plane thus, in contrast the traditional IP Networks
in the case routers will be performing the packet
forwarding and is helpful in running the routing
protocols useful in discovering the network paths and the
routing decisions such the case of forwarding elements
and is logically centralised by SDN controller. The SDN
controller is responsiblefor managing and configuring
the individual SDN switches by installing the appropriate
forwarding rules. Theinterface between the control layer
and the infrastructure layer is referred as thesouth bound
interface [ 7]. The interface between theapplication and
the control layer is north bound interface. As the open
flow is the SDN south bound between thecontrol layer
and infrastructure layer [7]. The open flow is useful that
allows the controller to configure and manage the
switches.

3. Figure: SDN Architecture [7]
Current Approach towards SDN Topology Discovery:
The SDN controller is able to manage the network and
thus, providing theservices such as routing it thus, needs
such that it is useful in updating information about the
stateof the network particularly the network topology.
Thus, a reliable and efficient topology discovery
mechanism stands out critical for the any SDN system.
As the Open Flow switch does not support thededicated
functionality for the topology discovery, such that it is
solely responsible[7] for the controller so as to
implement the service. The current controller standards
are in open flow based SDNs. The implementation that
the current controller is of the same function as the
implementation in NOX [7] it is based on theSDN
controller hence this mechanism is referred as OFDP
(open flow discovery control). The LLDP allows the
IEEE802 hence the local area network such that
advertising the capabilities and their protocols. The
LLDP is thus, implemented by theEthernet switches
such that they can actively sending and receiving the
LLDP packets. As the LLDP could be implemented by
the Ethernet switches such that could actively use in
sending and receiving LLDP packets. The LLDP payload
is thus, encapsulated in the Ethernet frame with the Ether
typefield. Theone of themandatory thing in the TLVs
are of thechassis ID hence it turns out to be unique for
the port ID and the time taken to live.
Figure: LLDP frame Structure [7]
Proposed Improvement – OFDPv2: Theproposed
changes in the SDN topology called the OFDPv2 it
brings the following changes that modifying the
behaviour so as to limit thenumber of LLDP packet
switches have been sent out to switch one. Thus,
installing thenew rule such that the LLDP packets are
thus, forwarded to theavailable ports and the MAC
address sent out to be each switch one. Thus, new rule
each switch that the LLDP packets such that the
controller is forwarded to the available ports, such that
Ethernet frame is set to address is sent out by (Algorithm
1) [7 ] then finally such that Packet-In event handler [7]
such that they would be processing the LLDP packets.
Thus, Port ID TLV of LLDP look at the MAC address
hence Ethernet header and hence lookup to theone-to-
one mapping MAC address and switching Port IDs [7].
Research Results: As mentioned theproposed topology
discovery mechanism as in python POXSDN controller
[7] thus, a benchmarking is used so as to compare
performing extensive tests for thewide range of the
networks such that the topologies are useful in the
benchmark for the comparison. The performed extensive
have thewide range of network such that establishing the
equivalent functional of theOFDP and OFDPv2. They
are thus, identical such that they have the ability
discovering active links in the network. The main
purposeis useful for evaluating such that establishing
OFDPv2 in reducing controlling theoverhead as
compared to OFDP as the key measurement is the
overhead imposed in the controller such that the number
of controlling themessages as needed so in handling. In
the case, such the differentia so between OFDP and
OFDPv2 as regards as numbering of the LLDP packets
thus, received by controller open flow packet-in
messages. The key advantage possessingadvantage is
OFDPv2 numbering theLLDP packet-out messages
reducing only one per switch. The efficiency gain is so
relative numbering packet-out control messaging
reducing the OFDPv2 as so OFDPv2 as compared to rest
of them. So OFDPv2 performs so better. Thegaining of
the networks such that thenetwork with the highest
number of totalports such that higher for thenetwork
such that they possess highest average switch port
density. As per the experimental approach [7] in the
paper OFDPv2 stands out to be better as compared to the
OFDPv2 so this proposed methodology turns out to be
useful as compared to the previous model.
SERVICE-ORIENTED NETWORKING
VIRTUALIZATION CONVERGENCE
NETWORKING AND CLOUD COMPUTING
Virtualization [3] is thekey concept in the case of the
cloud computing is the key role such that the
communications and computing it is useful so as to
bridge gap such that they traditionally helpful so in
converging the cloud computing and Networking.
Network and cloud convergence [3] it is thus, useful in
combining the management, control and optimizing of
the cloud environment. As the service oriented [3]
principle is thus, applied so that thenetwork
virtualization and so the cloud computing offering the
promise approach so as it facilitates convergence of
networking and the cloud computing service oriented
network virtualization. As theconvergence of the
framework Nass is thus, useful in enabling the cloud
service requirements such that thenetworking
capabilities so discovering appropriatenetwork services
[3]. The futureof the SOA is providing theflexible and
the effective mechanism such that the cloud network-
cloud theinteraction of thecollaboration of networking
and computing systems. Thevalue of SDN plays a
pivotalrole in the case of Network Virtualization and so
the case it is automated configuration that is so done
rapidly across the network fabric deployment as of the
new services and to the end systemusefulness in
minimizing for the operational costs. As both SDN and
NFV [1] they are complementary technology they really
do not be dependent on each other as they are merged so

4. that they can potentially mitigate potentialchanges in the
legacy of the network. The major function of the SDN
controller is that it can be deployed as the virtual function
such as that the open flow switches are controlled by the
NFV software. The major advantage both NFV and SDN
[1] possess is the replacement of the expensive and
dedicated hardware equipment so by the softwareand the
generic hardware the costs could be marginally cut down.
SDN andNFV COMPARSION
SDN NFV
Motivation Decoupling the
control and data
planes and
Providing the
centralized
controller and
the
programmability
Abstraction of
the network
functions so
dedicated
hardware
appliances are
placed
Network
Location
Data centres Service
provider
networks
Network
Devices
Servers and
switches
Servers and
switches
Protocols Open flow
Applications Cloud
orchestration
and networking
Firewalls,
gateways and
content
delivery
network
Standard
committee
Open
networking
forum
ETSI NFV
group
The SDN [1] applications could be widely used in so it
stands out to be a motivation for the data centres
approaching so limiting. The virtualization concept of
using the virtualization technology as the initiatives by
the usage of the virtualization technology and it
usefulness of the integration of theservices required so.
Naas and SDN Integration: Naas turns out to be
promising opportunities of SDN and Naas [1] such that
the orchestration systemturns to be beneficial in
controlling and viewing thenetwork layer. Based on the
research studies [1] such that been proposed Naas
platformin theSDN environment. Cloud Naas [1]
consists of the cloud controller and the Network
controller. It satisfies therequirements of the user and
thus it is helpful in transforming the communication
matrix that hereby, so resides on the Open Nebula
Framework. They are so compiled such that of the
network rules by thenetwork controller. These
techniques are so implanted in the network controller and
they are so much designed so as in optimizing the traffic
such as the case of VM placement and forwarding entry
aggregation using output ports. TheNetwork
Management in Naas [1] it supportsthenetwork
management operations that is set up in the Naas model
such that it consists of themultiple service module so as
in collecting theinformation for the physicaland the
virtual network infrastructure. Naas is being an ultimate
connection between SDN and cloud computing. SDN [1]
takes theresponsibility of packet forwarding and
Network administration.
NAS and SAN interfaces: SAN systems are useful in
providing thesimple, untyped, fixed size(block) and the
memory like interface are useful in manipulation of non-
volatile magnetic media. SAN systems [2] will be
providing a simple, untyped, fixed size for manipulation
of non-volatile magnetic media as the SAN makes it
possibility of the multiple clients as the accessibility of
same storage devices directly, sharing resources are been
coordinated. SAN includes fibre channel disk is theSAN
device. It includes thefibre channel hubs, switches and
routers such that “SAN systems”[2] is attached storage.
NAS systems is that internally the interface such that
non-volatile it possesses theSAN ensures the data
reliability.
CONVERGING OF NAS AND SAN: Theplacement
of file function plays an important difference in the
abstraction of NAS and SAN [2] systems such that
implementing thespecialized storage for the increase of
the NAS systemand the decreasing in SAN system.
Thus, the way of implementing is being specialized so as
in the increasing of the NAS systems and decreasing of
SAN systems. In, the case of specialization in the
hardware, softwareand the networking that efficiently
leads to the efficient usage of the resources. The
specialization turns out to be useful for the reason that
the hardware, software or networking yielding the
efficient usage of the resources. The specialization is said
to be costly as it is helpful in restricting the market size
such that the development costs could be easily
recovered. As more specialization for the Network
attached storage such that they are attached storage,
originally known as the network file service such that
developed for the Ethernet LANS and engineering work
stations thesefile servers are employed for the general
purposesuch as operating the systems on the general
hardware in the same machines are sold computing the
server. So, the case of the storage appliances is of the
NAS systems is indeed ranging so managing [2] of the
Network appliances such of thedisk drive is of the
Ethernet plug. The requirements for the emerging
systems for the futurenetwork storage [2] systems such
that providing thefeatures meeting all the existing
requirements of NAS and SAN systems it is
responsibility for the organisation information
technology. The storage applications [2] of theNAS
systems are so intended specially managing theNetwork
Applications terabyteservers ranges from theEthernet
plug. The need for theperformance of such that
scalability of capacity it is measured accesses per second
or megabytes such that there is a need of the mega
scaling with the storage capacity such that increasing the
size of thedatasets. It is helpful so increasing scale and
scopeof storage systemmeeting the requirements. Thus,
the SDN are encapsulated in theframes so there is tunnel
header is such that the overlaying physicalnetwork
infrastructure are thus shown as illustrated below
diagram.

5. Figure: Encapsulated Frames [9]
CHALLENGES AND PROBLEMS RESOLVED BY
USING SDN
Reliability of SDN turns out to the promising solution [1]
for the providers and the interface such that they
performing and implementing in cloud and the wireless
networks. SDN controller it hereby, shows intelligently,
configuration and valuable. Theintelligent could be
inhibited so brain splittingproblems it can be liability of
the controller for the case of thesingle point of failure.
The author [1] in thepaper has showed thereason
reliability issues is case of failure the case of multi-
pathing and congestion load balancing so the distributed
algorithm is controller failure. Scalability turns useful for
so evolve independently and such that the network
accelerates changes in thecontrol plane. There are
several drawbacks could be resolved by using SDN [1].
It hereby, shows planes, scalability and thus due to the
limitations. The performance of it is based on theset up
such that the controller performances in the case setting
up the flow. Thebenchmarks are hereby set up such that
responding it supports so that benchmarks are set up as
per the new flow. As it is shoed case so shown it will be
supportingthousands of installations are thus, shown.
SDN platforms could limit to be turns solution.
The benefits of theNetwork virtualization are that
showing thechallenges:
 Encouraging Network Innovation
 Deployment of the Agile Network capabilities
 Resource optimization
 Co-existence of dissimilar networks
 Resource optimization
The Network Virtualization turns out to be
simplified solution. As theNetwork attached
storage turns out to be useful solution.
RELATED WORKS:
The related work in the Network virtualization [8] is said
to be that theresearchers had proposed thecase of
network virtualization of these contexts in the earlier
cases ATM switches [8] are hereby partitioned to “switch
lets “such that they would be enabling the creation of the
virtual networks. In the recently [8] such that the
virtualization solution of theSDNs such so they would
be complementing the virtualized computing
infrastructure in the multitenant of the data centre. The
Network Virtualization in SDN environment stands out
such that they would be differentia from current such that
they splittingof the address spaceand virtual topology.
The flown will be full virtualizing theaddress space and
thus, represents virtual topology. Thebenefit that works
out that SDN and converged networks are the networking
techniques, so the proposalSDN enabled convergent
networking is useful for the resource management.
CONCLUSION
As the storage systems arebecoming dominant
investment in the corporation of the data centres and it
hereby, shows a crucial thing. It is such that both SDN
and the network attached storage is thus, increasing
internet-dependent due to business and thecomputing is
shown, and thenetwork storage is the computer.
In this paper discussed open flow based of thesoftware
defined network hence the topology of theSDN is
described as this turns out to be the promising solution
for the SDN topology is the key component and shows
they are logically centralised the services are thus,
provided and frameworks are discussed. The OFDPv2
proposed solution that is improved such that it provides
better services in the SDN.
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http://cdn.ttgtmedia.com/rms/editorial/HowSDNWorks-
SoftwareDefinedNetworks-Ch4.pdf