Persistent object sharing for sidle services

Presented by:
Mohsin (09-CSS-46)
Abd-Us-Salam(09-CSS-01))

Introduction
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• We are going to present a
system that coordinates service
proxies placed at the “sidle” of
the Internet to serve distributed
clients accessing a service
involving mutable objects.
• It performs consistent accesses
to shared objects by migrating
the objects to proxies
performing operations on those
objects.

• It reduces the workload in the server. It perform the all
operations in the proxies itself.
• It handles two process serializability and strict serializability
for durability in the consistent object sharing.
• It supports optimizations for single-object reads that do not
involve migrating the object.
• It disperses the computation load across the proxies and saving
the costs of sending operation parameters over the wide area
when these are large.

object object
Proposed Scheme
• This system forms the proxies
in the tree structure. It shares
the objects within the proxies.
It reduces the workload in the
server.
• It enables consistent
multiobject operations and
optimizations for single-object
reads that are not possible in
these prior algorithms.

• This system recovers the proxy disconnection. The
disconnected proxies maintained by alternate proxies
or it will be maintained through server.
• This System use the kruskal’s algorithm for maintaining tree
structure. It reduces weightage in the tree structure.
• It holds the object even when the proxy has been
disconnected.

Modules :-
• Server and Proxy creation.
• Object Migration from centralized server to proxies.
• Parent Proxy and Child Proxy Maintenance while
dis-connection.
• Parent Proxy and Child Proxy Maintenance while
dis-connection.
• Multiple and Consistent object sharing.
Implementation
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Module 1 :-
In this module we going to launch a centralized server ,
unbounded number of parent proxies and minimum number of
child proxies. This server will provide the application to all the
parent proxies.
Module 2 :-
This module deals with object migration its nothing
but transferring our application from centralized server to the
parent proxies. The server converts the whole application to
an object. Then the parent proxies provides object to the child
proxies.

Module 3 :-
This module provides the alternate solution when
the proxies getting down. The client will get the response
from some other proxies.
Module 4 :-
Here we are going to maintain the depth of the tree
using kruskal’s algorithm. This algorithm calculates the round
trip delay between the proxies .Through that it will found the
data round trip delay.
Module 5 :-
In this module we going to share the object consistently
with out any interruption.

• L. Gao, M. Dahlin, J. Zheng, L. Alvisi, and A. Iyengar, “Dual-
Quorum Replication for Edge Services,” Proc. Sixth ACM/
IFIP/Usenix Int’l Middleware Conf. (Middleware), 2005.
• M.T. O ¨ zsu and P. Valduriez, “Distributed and Parallel
Database Systems,”ACM Computing Surveys, vol. 28, no. 1, pp.
125-128, 1996.
• M. Nuttall, “A Brief Survey of Systems Providing Process or
Object Migration Facilities,” ACM Operating Systems Rev., vol.
28, no. 4, pp. 64-80, Oct. 1994.
• S. Miloji_ci_c, F. Douglis, Y. Paindaveine, R. Wheeler, and S.
Zhou, “Process Migration,” ACM Computing Surveys, vol. 32,
no. 3, pp. 241-299, Sept. 2000.
• Michael K. Reiter, Asad Samar, : Consistent Object Sharing for
Edge Services”,IEEE Trans. On parallel and distributed
system,vol.19, No.7, July 2008.
References

Persistent object sharing for sidle services

Persistent object sharing for sidle services

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