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Articles by N. Ramaraj
Total Records ( 2 ) for N. Ramaraj
  Senthamarai Kannan Subramanian and N. Ramaraj
  With the increase in growth of Email Communication, it is necessary to organize the information for faster and easier processing. Usually, the companies receive huge number of emails to the single email address. Customer service center of an organization is one such example. Usually this kind of emails should be responded within a certain amount of time by a responsible person. In order to meet this challenge, automatic categorization of all incoming emails must be extremely useful because it can help route an email to the right person. The focus of the research is to find out whether this classification can be used to automatically route incoming emails to the person in charge using an association rule mining methodology and apriori algorithm. One major advantage of the association rule based classifier is that it does not assume that terms are independent and its training is relatively fast. Furthermore, the rules are human understandable and easy to be maintained or pruned by human being.
  R. Saravanan and N. Ramaraj
  Problem statement: Data inconsistency is raised in actively replicated environment due to non-determinism in the applications that defeats the purpose of replication as a fault-tolerance strategy. Approach: We proposed an efficient framework RTC which ensured determinism among the replicas in fault tolerance middleware applications. This method exploits the technique of statically analyzing the application source code of client and identifies the variables and system calls which lead to non-deterministic state in the replicas. The source code consists of non-deterministic variables and system calls which are identified and set the flag field. The client request consist of flag field and the service request, which is sent to all the servers through time stamp based replication protocol (TSP) that facilitate the multiple clients and the request is sent to the servers. The distributed coordination method was initiated if necessary; otherwise send any one response of the servers to the client by duplicate removal. Distributed coordination which involves, the selection of a primary replica based on the time stamp value. It is responsible for taking all non-deterministic decisions. The state of the primary replica was updated to all other replica connected asynchronously to maintain consistency. Results: We evaluated our technique by increasing the contamination percentage of non-determinism and increasing number of replicas. Conclusion: The method suggested by us reduces the communication and synchronization overhead which was proved through implementation. We evaluate our technique for the active replication of servers using micro benchmarks that contain various sources of non-determinism. Multi-threading, system call, shared I/O and random ( ).
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