Informatics Publishing Limited

G. Thilip Kumar ¹, R. Balasubramanian ¹

Affiliations
1 J.J. College of Arts and Science, Bharathidasan University, Trichy, IN

Abstract

Cluster based web server has become a critical issue in various concert. Since user-level communication is an effective technique to reduce the intra-cluster communication overhead, cluster-based Web server design utilizing user-level communication mechanisms has been a popular research focus in recent times. In this context, the overall objective of this research is to explore several design issues in order to enhance the performance of cluster-based network servers based on user-level communication mechanisms. Due to their complexity, the performance of cluster-based Web servers is dependent on various design choices and demands imposed on the systems. Therefore, we investigate several design issues with different system environments as explained below. First, we propose a coscheduled server model, which coschedules the communication processes of a request. Its main objective is to minimize the response time of requests that need intra-cluster communication. It has two familiar techniques called Dynamic Coscheduling and DCS with immediate blocking. Secondly, SSL is providing the cluster-based application servers and it proposes a SSL with BF. Hence, improving the concert of SSL-enabled application servers is serious for designing scalable and high concert data center. Finally, it proposes a NIC data caching scheme, and it improves the distributed Web server’s performance. Although NIC memory is traditionally used for communication, it can be used for improving performance as well because modern NICs are equipped with much larger amounts of memory.

To investigate these techniques, it develops a widespread recreation testbed that captures the underlying communication layer in a cluster, the coscheduling algorithms, and the characteristics of a distributed Web server model. Extensive experiments of three proposed schemes using this testbed show that performance of cluster-based Web servers can significantly increase by employing these techniques.

Keywords

Cluster Based Web, Dynamic Coscheduling, NIC, Secure Socket Layer.

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G. Thilip Kumar ¹, A. Saravanan ², C. Ramachandran ², Nitin Ashok John ²

Affiliations
1 Department of Physiology, S.R.M. Medical College Hospital and Research Centre, Potheri (T.N.), IN
2 Department of Physiology, SRM Medical College Hospital and Research Centre, Potheri (T.N.), IN

Abstract

Sub clinical hemochromatosis has been considered as one of the probable cause for diabetes mellitus and this fact gave us an impetus to study the serum ferritin level in type 2 diabetes mellitus and correlate with HbA1c and MBG. This study was conducted in forty seven diabetic patients and compared with forty seven normal age-matched individuals as the control group. Blood samples had been taken from the subject after overnight fasting; the serum ferritin levels, HbA1C and mean blood glucose level were measured. Data were analyzed by student "t" test, chi- square analysis, and correlation coefficient test. Serum ferritin, HbA1c and MBG were significantly increased in type 2 diabetes patients. Out of the forty seven diabetic patients twenty four had hyperferritinemia, and twenty eight cases had poor control of HbA1c and MBG level. From this study it was concluded that 51 per cent of the diabetes patients had significantly higher serum ferritin level when compared to the normal and there is no correlation between serum ferritin, HbA1c and MBG but there is a positive correlation between HbA1c and MBG. Thus elevated serum ferritin concentration was associated with an increased risk of diabetes.

Keywords

Diabetes Mellitus, Serum Ferritin, Glycated Hemoglobin, Mean Blood Glucose Level, Hemochromatosis.

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