Performance management of Java-based SIP application servers

Abstract

Within the activities of the Java APIs for Integrated Networks (JAIN), the Java community offers a set of standard frameworks and open protocol APIs to create advanced telecommunications services. However, recent works have pointed out that Java-based implementations of the Session Initiation Protocol (SIP) stack, the fundamental signalling protocol in the convergent telephone-IP world, perform poorly if they are executed by large multi-core servers, typically used in data centres. The problem lies in the combination of the SIP protocol semantics with the Java language features, which does not allow fully exploiting the computing capabilities of multi-core architectures. To face this problem, we propose a solution to improve the throughput and signalling latency of applications implemented by using Java-based SIP application servers. It consists of the joint usage of virtualization and parallelization techniques. We have performed an extensive measurement campaign by using an open source application server compliant with the JSLEE (JAIN Service Logic Execution Environment) specifications. The rationale of this choice is that JSLEE application servers are currently regarded as very promising candidates for deploying telecom services. Results show that it is possible improving performance in terms of throughput and signalling latency by running more instances of the JSLEE server in parallel, each of them into separate virtual machines deployed on the same server. This improvement can increase throughput values of about 64% and, in the maximum throughput condition, the call set up latency can be nearly halved.

Distributed Management Information Models

“…Explicit support for starting, joining, committing, and aborting transactions must be provided. Further, transaction approaches do not scale well, as the number of application instances increase the speed of transaction execution diminishes rapidly [17] [18].…”

An Architectural Framework for Delivering Sip-As Multimedia Services Based on JADE/OSGI Technology

“…Femminella et al [14] describes a proposal and analysis of original usage of virtualization and parallelization techniques in order to better exploit the computing capabilities of servers hosting Java implementations of SIP application servers (ASs). The authors used a hypervisor to host SIP ASs virtual machines (VMs) and an open source JSLEE AS (Mobicents) running a SIP-based VoIP service, performing several database queries during an call lifetime.…”

Enhancing java call control with media server control functions

“…The JCC RA has been implemented by using the MSLEE v. [8], which show that virtualization optimizes the usage efficiency of the computing resources for Java servers.…”

“…In our experiments, the most significant contribution to the SRD is the processing time within ASs. Hence, we consider acceptable an input load if the 95-th percentile of associated processing time is below 500 ms [8]. Outcomes with average SRD values larger than 1 second or call loss rate larger than 1% are not shown.…”