An Information retrieval system like search engine with
centralized approach has a drawback that it takes a long time
interval updation of index. The purpose of storing an index is
to optimize speed and performance in finding relevant
documents for a search query. Collections are often so large
that we cannot perform index construction efficiently on a
single machine. This is particularly true of the World Wide
Web which grows tremendously. The Indexed Web contains at
least 25.27 billion pages [2] for which we need large computer
clusters to construct any reasonably large sized web index