[Gzz-commits] gzz/Documentation/misc/hemppah-progradu mastert...

[Hermanni Hyytiälä]

CVSROOT:        /cvsroot/gzz
Module name:    gzz
Changes by:     Hermanni Hyytiälä <address@hidden>      03/02/26 03:52:02

Modified files:
        Documentation/misc/hemppah-progradu: masterthesis.tex 

Log message:
        Conclusion

CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/gzz/gzz/Documentation/misc/hemppah-progradu/masterthesis.tex.diff?tr1=1.75&tr2=1.76&r1=text&r2=text

Patches:
Index: gzz/Documentation/misc/hemppah-progradu/masterthesis.tex
diff -u gzz/Documentation/misc/hemppah-progradu/masterthesis.tex:1.75 
gzz/Documentation/misc/hemppah-progradu/masterthesis.tex:1.76
--- gzz/Documentation/misc/hemppah-progradu/masterthesis.tex:1.75       Wed Feb 
26 03:14:41 2003
+++ gzz/Documentation/misc/hemppah-progradu/masterthesis.tex    Wed Feb 26 
03:52:02 2003
@@ -1150,7 +1150,7 @@
 \\ \hline
 
 
-\parbox{90pt}{Efficient data discovery \cite{lv02searchreplication}, 
\cite{osokine02distnetworks}, \cite{yang02improvingsearch}, 
\cite{lv02gnutellascalable}, \cite{ganesan02yappers}, 
\cite{adamic02localsearch}, \cite{adamic01powerlawsearch}, 
\cite{ripeanu02mappinggnutella}, \cite{milgram67smallworld}, 
\cite{adamic99small}, \cite{sterling95beowulf}, \cite{ramanathan02goodpeers}, 
\cite{kleinberg99small}, \cite{nips02-Kleinberg}, \cite{zhang02using}, 
\cite{watts00dynamics}} &
+\parbox{90pt}{Efficient and scalable data discovery 
\cite{lv02searchreplication}, \cite{osokine02distnetworks}, 
\cite{yang02improvingsearch}, \cite{lv02gnutellascalable}, 
\cite{ganesan02yappers}, \cite{adamic02localsearch}, 
\cite{adamic01powerlawsearch}, \cite{ripeanu02mappinggnutella}, 
\cite{milgram67smallworld}, \cite{adamic99small}, \cite{sterling95beowulf}, 
\cite{ramanathan02goodpeers}, \cite{kleinberg99small}, \cite{nips02-Kleinberg}, 
\cite{zhang02using}, \cite{watts00dynamics}} &
 \parbox{110pt}{Find resources efficiently, if resource exists (loosely 
structured)} &
 \parbox{110pt}{Super nodes, node clusters, caching techiques} &
 \parbox{110pt}{More efficient, less network traffic, not comparable to DHT's 
efficiency}
@@ -1206,12 +1206,6 @@
 \\ \hline
 
 
-\parbox{90pt}{Scalability} &
-\parbox{110pt}{Broadcasting doesn't scale when performing searches} &
-\parbox{110pt}{Super peers, peer clusters, mutual index caching} &
-\parbox{110pt}{Better scalability, but not comparable to DHTs}
-\\ \hline
-
 \parbox{90pt}{Load balancing \cite{rao03loadbalancing}, 
\cite{ledlie02selfp2p}, \cite{byers03dhtbalancing}} &
 \parbox{110pt}{Random (but uniformly distributed) identifier selection could 
cause systen imbalance among participants with different capabilities} &
 \parbox{110pt}{Caching, virtual server transfers} &
@@ -1899,8 +1893,35 @@
 
 \chapter{Conclusions}
 
-
-        
+In this thesis, we have reviewed existing Peer-to-Peer approaches, protocols 
and
+their properties. Currently, two main Peer-to-Peer overlay approaches
+exist: loosely and tightly structured ovelrays. We discussed approaches'
+differences, disadvantages and advantages.
+
+After that, we summarized open problems in Peer-to-Peer networks. Specifically,
+we divided open problems into three sub-categories: security related problems,
+performance related problems and miscellaneous problems. Each of these
+sub-categories have number of open problems, where there are no solutions
+yet, or solutions are only partial. Much research work is required to
+solve open problems.
+
+Then, we focused our attention to Fenfire system. First, we gave a brief
+overview of Fenfire and xanalogical model. We also discussed Storm and urn-5, 
+which are essential parts of Fenfire's Peer-to-Peer functionality.
+
+In last chapter, we evaluated existing Peer-to-Peer approaches with regard
+to Fenfire's needs. We proposed, that tightly structured approach is the
+best alternative to our needs. First, Storm, xanalogical
+model and tightly structured approach all use global unique identifiers
+for identifying data. Second, our Storm design uses Semantic-Free references
+for locating data in distributed networks. As the authors of 
\cite{balakrishnan03semanticfree},
+we also observe that tightly structured overlays provide general purpose
+interface to next-generation Reference Resolution Services. Second, by using 
+DOLR method of tightly structured overlay, we can minimize the the lack 
+of locality in tightly structured overlays. Finally, we believe that issues 
+related to tightly structured overlays are solved in near future, because of
+wide and intensive co-operation among research groups.
+ 
 
 
 \bibliographystyle{gradu}