Reliability and Availability Analysis of Database System with Standby Unit Provided by the System Provider
Sukhvir Singh1, Rahul Rishi2, Gulshan Taneja3, Amit Manocha4
1Sukhvir Singh, Department of Computer Science & Engg., NCCE, Israna, Haryana, India.
2Dr.Rahul Rishi, Department of Computer Science & Engg., UIET, M.D.U. Rohtak, Haryana, India.
3Dr. Gulshan Taneja, Department of Mathematics, MDU, Rohtak, Haryana, India.
4Dr. Amit Manocha, Department of Mathematics, TITS, Bhiwani, Haryana, India.
Manuscript received on February 04, 2013. | Revised Manuscript received on February 26, 2013. | Manuscript published on March 05, 2013. | PP: 235-237 | Volume-3 Issue-1, March 2013. | Retrieval Number: A1360033113/2013©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The present paper deals with the study of a database system having Primary database and hot standby database unit which is provided by the system provider itself. There is an agreement with the system provider that on the failure of the hot standby unit, another similar unit is immediately provided by him. The primary unit is a production unit and synchronized with hot standby unit through online transfer of archive redo logs. Data being saved in the primary unit gets simultaneously stored in the hot standby unit. When the primary database unit fails, the hot standby database unit becomes the production database and primary database unit goes under repair. The system is analyzed by making use of semi-Markov processes and regenerative point technique. Expression for Mean Time to System Failure, Mean Time to Failure of Primary Database Unit and Availability of Primary Unit are obtained. Graphical study has also been done.
Keywords: The hot standby database unit becomes the production database and primary database unit goes under repair.