Abstract
The dynamic consolidation of Virtual Machines (VMs) into a minimum number of Physical Machines (PMs) is a key energy-efficient practice in a cloud data centre, to reduce the running PMs and save electricity costs. We proposed a migration based VM consolidation approach for reserved requests. Real Da
Highlights
The poor resource utilisation rates in data centres motivated towards server consolidation, using an existing technology called virtualisation, to improve utilisation rates by realising multiple virtual servers out of a single physical server
A modified best fit decreasing (MBFD) algorithm was proposed by Beloglazov et al in [4], which carries out a continuous search of each Virtual Machines (VMs) and Physical Machines (PMs) combination to find the minimum power consuming combinations on the whole to reduce the Cloud Data Centers (CDCs) energy consumption
As part of energy efficient management of CDCs, VM consolidation has secured a major concern in reducing CSP operational expenses by minimising the PMs used
Summary
The poor resource utilisation rates in data centres motivated towards server consolidation, using an existing technology called virtualisation, to improve utilisation rates by realising multiple virtual servers out of a single physical server. In addition to the increase in resource utilisation, server consolidation resulted in economic and environmental benefits like low resource provisioning cost and reduction of harmful carbon footprints by reducing the required number of physical servers. Server consolidation motivated virtual resource provision over the Internet called cloud computing (infrastructure as a service). The scenario led to a new resource allocation problem called efficient VM initial placement in Cloud Data Centers (CDCs). Efficient initial placement can minimise VM migration, i.e., reallocation of VMs to another PMs
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