Testing Software Rejuvenation Policy for Time and Load Balancing Scheme in Complex System Using Deterministic-NDST Approach

Nagaraj G Cholli; Khalid Amin Shiekh; G N Srinivasan

doi:10.11591/ijset.v1i3.4581

Testing Software Rejuvenation Policy for Time and Load Balancing Scheme in Complex System Using Deterministic-NDST Approach

International Journal of Software Engineering and Technologies (IJSET) ◽

10.11591/ijset.v1i3.4581 ◽

2016 ◽

Vol 1 (3) ◽

pp. 185

Author(s):

Nagaraj G Cholli ◽

Khalid Amin Shiekh ◽

G N Srinivasan

Keyword(s):

Complex System ◽

Load Balancing ◽

System Reliability ◽

Deterministic System ◽

System Testing ◽

Traditional Form ◽

Software Rejuvenation ◽

Long Run ◽

Reliability And Availability

Software rejuvenation has become a new horizon for increasing the system reliability and availability in a long run. One of the concept in software rejuvenation policy involves rebooting the system by suspending the disk and capturing the images of processes currently running in the system. In our rejuvenation policy we make use an intelligent time and load algorithm for deciding the optimal rejuvenation period. Since at any given time there can be n number of processes running in the system with different physical memory utilizations and variable workloads running, it becomes very vital to thoroughly test the system with highly chaotic and disruptive workloads. For this we use some non-traditional form of testing which we call non deterministic system testing (NDST) to test different features and conditions of system

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Redundancy allocation of mixed warm and cold standby components in repairable K-out-of-N systems

Proceedings of the Institution of Mechanical Engineers Part O Journal of Risk and Reliability ◽

10.1177/1748006x20921306 ◽

2020 ◽

Vol 234 (5) ◽

pp. 696-707

Author(s):

Min Gong ◽

Hanlin Liu ◽

Rui Peng

Keyword(s):

Continuous Time ◽

System Reliability ◽

Continuous Time Markov Chain ◽

System Availability ◽

Long Run ◽

Proposed Model ◽

Cold Standby ◽

Running Cost ◽

Warm Standby ◽

Reliability And Availability

In system design process, standby redundancy is a widely used technique to improve system reliability and availability. Typical standby techniques involve cold standby, hot standby, and warm standby. In this article, we investigate the repairable K-out-of- N system with mixed standby strategy containing both warm and cold standby. In the proposed system, each component can be in failure, cold, warm, and active states and the components are assumed to be repairable. The systems are modeled by continuous time Markov chain and the system long-run availability is derived. Furthermore, the optimal configuration of standby components in the system is studied considering both system availability and system running cost. Illustrative examples are presented to show the applications of the proposed model.

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