Abstract
This article deals with an exploratory analysis of virtualized real-time applications. We compare selected virtualizations tools and present the achieved results in boxplots based on the performed exploratory analysis. The paper analyzes the impact of memory size and the number of processor cores on the delay itself and its variance in selected set of virtualization tools.
Highlights
Nowadays virtualization presents a solution which can enhance reliability, security, portability and ease the maintenance of computer clusters [1] and [2]
We found out that the selected virtualizations have different characteristics and their median values do not match
Due to the low virtual machine utilization and low number of the UDP sockets, we decided to implement a codec translation which, increases the utilization and after that we could observe a difference in performance of real-time applications on various virtualization platforms
Summary
Nowadays virtualization presents a solution which can enhance reliability, security, portability and ease the maintenance of computer clusters [1] and [2]. We found out that the selected virtualizations have different characteristics and their median values do not match. The main disadvantage is an overhead generated by the virtualization tool. The overhead causes virtual machines to be less efficient than the physical devices with similar attributes and reduces their performance. The overhead can have a negative impact especially on real-time applications since it can cause long delays and increase the variance of delay between the individual packets [3], [4] and [5]. The aim of this article is to find out what impact different implementations of the virtualization technology have on the real-time traffic represented here by IP telephony as it is one of the most widely spread realtime technologies. The influence of the number of processor cores and memory size is to be analyzed
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