Data Back-Up and Recovery Techniques for Cloud Server Using Seed Block Algorithm

R. V. Gandhi et al Int. Journal of Engineering Research and Applications www.ijera.com
ISSN : 2248-9622, Vol. 5, Issue 2( Part 3), February 2015, pp.89-93
www.ijera.com 89 | P a g e
Data Back-Up and Recovery Techniques for Cloud Server Using
Seed Block Algorithm
R. V. Gandhi1
, M Seshaiah2
, A. Srinivas3
, C. ReddiNeelima4
Department of Computer Science and Engineering, JigjigaUnivesity, Jigjiga, Ethiopia.
Department of Computer Science and Engineering, Visvesvaraya Technological University, Belgum, India.
Department of Computer Science and Engineering, HITS, R.R.Dist, Telangana, India.
Department of Computer Science and Engineering, MTIEAT, Palamaner, Chittoor Dist, A.P, India.
Abstract
In cloud computing, data generated in electronic form are large in amount. To maintain this data efficiently, there is a
necessity of data recovery services. To cater this, we propose a smart remote data backup algorithm, Seed Block
Algorithm. The objective of proposed algorithm is twofold; first it help the users to collect information from any remote
location in the absence of network connectivity and second to recover the files in case of the file deletion or if the cloud
gets destroyed due to any reason. The time related issues are also being solved by proposed seed block algorithm such
that it will take minimum time for the recovery process. Proposed seed block algorithm also focuses on the security
concept for the back-up files stored at remote server, without using any of the existing encryption techniques.
Key Words: Data Recovery, Seed Block Algorithm, Security, center repository, backup repository.
I. INTRODUCTION
Cloud computing defines as a model for
enabling convenient, on-demand network access
to a share pool of configurable computing service
that can be provisioned rapidly and released with
minimal management effort or services provider.
Today, Cloud Computing is itself a gigantic
technology which is surpassing all the previous
technology of computing of this competitive and
challenging IT world. The need of cloud
computing is increasing day by day as its
advantages overcome the disadvantage of various
early computing techniques. Cloud storage
provides online storage where data stored in form
of virtualized pool that is usually hosted by third
parties. The hosting company operates large data
on large data centre and according to the
requirements of the customer these data centre
virtualized the resources and expose them as the
storage pools that help user to store files or data
objects. As number of user shares the storage and
other resources, it is possible that other customers
can access your data. Either the human error,
faulty equipment’s, network connectivity, a bug
or any criminal intent may put our cloud storage
on the risk and danger. And changes in the cloud
are also made very frequently; we can term it as
data dynamics. The data dynamics is supported
by various operations such as insertion, deletion
and block modification. Since services are not
limited for archiving and taking backup of data;
remote data integrity is also needed. Because the
data integrity always focuses on the validity and
fidelity of the complete state of the server that
takes care of the heavily generated data which
remains unchanged during storing at main cloud
remote server and transmission. Integrity plays an
important role in back-up and recovery services.
However, still various successful techniques are
lagging behind some critical issues like
implementation complexity, low cost, security
and time related issues. To cater these issues, we
propose a smart remote data backup algorithm,
Seed Block Algorithm (SBA). The contribution of
the proposed SBA is twofold; first SBA helps the
users to collect information from any remote
location in the absence of network connectivity
and second to recover the files in case of the file
deletion or if the cloud gets destroyed due to any
reason.
II. RELATED WORK
2.1. Problem statement
In cloud computing, to maintain the data efficiently,
there is a necessity of data recovery services. To cater
this, we propose a smart remote data backup algorithm,
Seed Block Algorithm. Using Seed block algorithm we
recover the files in case of the file deletion or if the cloud
gets destroyed due to any reason. The time related issues
are also being solved by proposed Seed Block Algorithm
such that it will take minimum time for the recovery
process. Proposed Seed Block Algorithm also focuses on
the security concept for the back-up files stored at remote
server, without using any of the existing encryption
techniques.
RESEARCH ARTICLE OPEN ACCESS

2.2. Existing Statement
The recent back-up and recovery techniques that
have been developed in cloud computing domain such are
HSDRT, (PCS) Parity Cloud Service, (ERGOT) Efficient
Routing Grounded on Taxonomy, Linux Box, Cold/Hot
backup strategy etc. Detail review shows that none of
these techniques are able to provide best performances
under all uncontrolled circumstances such as cost,
security, low implementation complexity, redundancy
and recovery in short span of time.
2.3. Proposed System
The objective of proposed algorithm is twofold; first
it help the users to collect information from any remote
location in the absence of network connectivity and
second to recover the files in case of the file deletion or if
the cloud gets destroyed due to any reason.
Usually Backup server of main cloud is the copy of
main cloud. When this Backup Server is at remote
location (i.e. far away from the main server) and having
the complete state of the main cloud, and then this remote
location server is termed as Remote Data Backup Server.
The main cloud is termed as the central repository and
remote backup cloud is termed as remote repository. To
tackle the challenges like low implementation
complexity, low cost, security and time related issues we
propose Seed Block Algorithm (SBA) algorithm.
III. IMPLEMENTATION
These aim to objectively and rationally uncover the
strengths and weaknesses of the existing business or
proposed venture, opportunities and threats as presented
by the environment, the resources required to carry
through, and ultimately the prospects for success. In its
simplest term, the two criteria to judge feasibility are cost
required and value to be attained. As such, a well-
designed feasibility study should provide a historical
background of the business or project, description of the
product or service, accounting statements, details of
the operations and management, marketing research and
policies, financial data, legal requirements and tax
obligations. Generally, feasibility studies precede
technical development and project implementation.
Cloud Server - Central Repository
In some respects cloud servers work in the same way
as physical servers but the functions they provide can be
very different. When opting for cloud hosting, clients are
renting virtual server space rather than renting or
purchasing physical servers. They are often paid for by
the hour depending on the capacity required at any
particular time. Traditionally there are two main options
for hosting: shared hosting and dedicated hosting. Shared
hosting is the cheaper option whereby servers are shared
between the hosting provider’s clients. One client’s
website will be hosted on the same server as websites
belonging to other clients. This has several disadvantages
including the fact that the setup is inflexible and cannot
cope with a large amount of traffic. Dedicated hosting is a
much more advanced form of hosting, whereby clients
purchase whole physical servers. This means that the
entire server is dedicated to them with no other clients
sharing it. In some instances the client may utilize
multiple servers which are all dedicated to their use.
Dedicated servers allow for full control over hosting. The
downside is that the required capacity needs to be
predicted, with enough resource and processing power to
cope with expected traffic levels. If this is underestimated
then it can lead to a lack of necessary resource during
busy periods, while overestimating it will mean paying
for unnecessary capacity. With cloud hosting clients get
the best of both worlds. Resource can be scaled up or
scaled down accordingly, making it more flexible and,
therefore, more cost-effective. When there is more
demand placed on the servers, capacity can be
automatically increased to match that demand without
this needing to be paid for on a permanent basis. This is
akin to a heating bill; you access what you need, when
you need it, and then only pay for what you’ve used
afterwards. Unlike dedicated servers, cloud servers can
be run on a hypervisor. The role of a hypervisor is to
control the capacity of operating systems so it is allocated
where needed. With cloud hosting there are multiple
cloud servers which are available to each particular client.
This allows computing resource to be dedicated to a
particular client if and when it is necessary. Where there
is a spike in traffic, additional capacity will be temporarily
accessed by a website, for example, until it is no longer
required. Cloud servers also offer more redundancy. If
one server fails, others will take its place. Cloud
computing is the provision of dynamically scalable and
often virtualized resources as a services over the
internet Users need not have knowledge of, expertise in,
or control over the technology infrastructure in the
"cloud" that supports them. Cloud computing represents a
major change in how we store information and run
applications. Instead of hosting apps and data on an
individual desktop computer, everything is hosted in the
"cloud server" called the central repository an assemblage
of computers and servers accessed via the Internet. User
can use the cloud server for storing the data in a secure
manner. For using the cloud server; user can register first
for getting the user id and password. If the user is already
registered then user can use the cloud server with the user
id and password.
Backup Repository
The main cloud is termed as the central repository
and remote backup cloud is termed as Backup repository.
And if the central repository lost its data under any
circumstances either of any natural calamity (for ex -
earthquake, flood, fire etc.) or by human attack or deletion
that has been done mistakenly and then it uses the
information from the remote repository. The main
objective of the backup facility is to help user to collect
information from any remote location even if network

connectivity is not available or if data not found on main
cloud. Backups have two distinct purposes. The primary
purpose is to recover data after its loss, be it by data
deletion or corruption. Data loss can be a common
experience of computer users The secondary purpose of
backups is to recover data from an earlier time, according
to a user-defined data retention policy, typically
configured within a backup application for how long
copies of data are required. Though backups popularly
represent a simple form of disaster recovery, and should
be part of a disaster recovery plan, by themselves,
backups should not alone be considered disaster
recovery. One reason for this is that not all backup
systems or backup applications are able to reconstitute a
computer system or other complex configurations such as
a computer cluster, directory servers, or a database server,
by restoring only data from a backup.
Since a backup system contains at least one copy of
all data worth saving, the data storage requirements can
be significant. Organizing this storage space and
managing the backup process can be a complicated
undertaking. A data repository model can be used to
provide structure to the storage. Nowadays, there are
many different types of data storage devices that are
useful for making backups. The Remote backup
services should cover the following issues:
 Privacy and ownership.
 Relocation of servers to the cloud.
 Data security.
 Reliability.
 Cost effectiveness.
Privacy and ownership
Different clients access the cloud with their
different login or after any authentication process.
They are freely allowed to upload their private and
essential data on the cloud. Hence, the privacy and
ownership of data should be maintained; Owner of
the data should only be able to access his private data
and perform read, write or any other operation.
Remote Server must maintain this Privacy and
ownership.
Relocation of server
For data recovery there must be relocation of
server to the cloud. The Relocation of server means
to transfer main server’s data to another server;
however the new of location is unknown to the client.
The clients get the data in same way as before
without any intimation of relocation of main server,
such that it provides the location transparency of
relocated server to the clients and other third party
while data is been shifted to remote server.
Data security
The client’s data is stored at central repository
with complete protection. Such a security should be
followed in its remote repository as well. In remote
repository, the data should be fully protected such
that no access and harm can be made to the remote
cloud’s data either intentionally or unintentionally by
third party or any other client.
Reliability
The remote cloud must possess the reliability
characteristics. Because in cloud computing the main
cloud stores the complete data and each client is
dependent on the main cloud for each and every little
amount of data; therefore the cloud and remote
backup cloud must play a trustworthy role. That
means, both the server must be able to provide the
data to the client immediately whenever they required
either from main cloud or remote server.
Cost effectiveness
The cost for implementation of remote server
and its recovery & back-up technique also play an
important role while creating the structure for main
cloud and its correspondent remote cloud. The cost
for establishing the remote setup and for
implementing its technique must be minimum such
that small business can afford such system and large
business can spend minimum cost as possible.
IV. RESULTS
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V. CONCLUSION
In this project, we presented detail design of
proposed SBA (seed Block algorithm) algorithm.
Proposed SBA is robust in helping the users to collect
information from any remote location in the absence of
network connectivity and also to recover the files in case
of the file deletion or if the cloud gets destroyed due to
any reason. Experimentation and result analysis shows
that proposed SBA also focuses on the security concept
for the back-up files stored at remote server, without
using any of the existing encryption techniques. The time
related issues are being solved by proposed SBA such
that it will take minimum time for the recovery process.
Many reputed companies can store the confidential data
without much risk, Security is also being increased.
REFERENCES
[1] Yoichiro Ueno, Noriharu Miyaho, Shuichi
Suzuki, Muzai Gakuendai, Inzai-shi, Chiba,
Kazuo Ichihara, 2010, "Performance
Evaluation of a Disaster Recovery System
and Practical Network System Applications,
" Fifth International Conference on Systems
and Networks Communications, pp 256-
259.
[2] Chi-won Song, Sungmin Park, Dong-wook
Kim, Sooyong Kang, 2011, "Parity Cloud
Service: A Privacy-Protected Personal Data
Recovery Service, " International Joint
Conference of IEEE TrustCom-11/IEEE
ICESS-11/FCST-11.
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Talia, Paolo Missier and Carole Goble,
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[8] M. Armbrust et al, “Above the clouds: A
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[9] F.BKashani, C.Chen, C.Shahabi.WSPDS, 2004,
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AUTHOR’S PROFILE
Mr. R.VENKATESWARA
GANDHI, Post Graduated in Computer Science &
Engineering (M.Tech) From JNT University,
Hyderabad in 2009 and Graduated in Computer
Science & engineering (B.Tech) form JNTU,
Hyderabad, 2007. He is working as an Lecturer in
Department of Computer Science & Engineering in
JigjigaUnivesity, Jigjiga, Ethiopia. He has 5+ years
of Teaching Experience. His Research Interests
Include Network Security, Cloud Computing & Data
Warehousing and Data Mining.
Mr. M Seshaiah, Post Graduated in
Computer Science & Engineering (M.Tech) From
Visvesvaraya Technological University, Belgum in
2010 and Graduated in Computer Science &
engineering (B.Tech) form VTU,Belgum,2003. He is
working as an Assistant Professor in Department of
Computer Science & Engineering in S.J.C.Institute
of Technology, Chickballapur. He has 11+ years of
Teaching Experience. His Research Interests Include
Network Security, Cloud Computing & Data
A.Srinivas, Post Graduated in
Computer Science & Engineering (M.Tech) From
JNT University, Hyderabad in 2009 and Graduated
in Computer Science & Information Technology
(B.Tech) from JNTU, Hyderabad in 2004.He is
currently working as an Assistant Professor,
Department of Computer Science & Engineering in
Holy Mary Institute of Technology and Science
(HITSCOE), (V) Bogaram, (M) Keesara, R.R.Dist,
Telangana, India. He has 8+ years of Teaching
Experience. His research interests include Cloud
Computing, Data Mining, Information Security,
Software Testing, Wireless Networks and Software
Quality.
Mrs C.ReddiNeelima, Post
Graduated in Computer Science & Engineering
(M.Tech), JNTU University, Anantapur in 2014 and
Graduated in Computer Science Engineering
(B.Tech) from SK university, Anantapur in 2008. She
is working as an Assistant Professor in Department of
Computer Science & Engineering in Mother
Theresa Institute of Engineering and Technology,
Chittoor Dist, A.P and India. She has 3 years of
Teaching Experience. Her Research Interests Include
Network Security, Cloud Computing & Data

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