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With the growing scale of current computing systems, traditional configuration tuning methods become less effective because they usually assume a small number of parameters in the system. In order to handle the scalability issue of configuration tuning, this paper proposes a cooperative optimization framework, which mimics the behavior of team playing to discover the optimal configuration setting...
Performance regression testing detects performance regressions in a system under load. Such regressions refer to situations where software performance degrades compared to previous releases, although the new version behaves correctly. In current practice, performance analysts must manually analyze performance regression testing data to uncover performance regressions. This process is both time-consuming...
The network service providers always prepare hardware design, maintenance and upgrading action plan via experience. This usually leads to large amount of waste resources. Although many complex models have been introduced into the research held of high performance network QOS evaluation, it is hard for such method to be applied into production environment because of the random and complex character...
Defined by the 3GPP, the IP multimedia subsystem (IMS) is an architectural framework that enables the delivery of multimedia services in mobile networks. Based on the session initiation protocol, the IMS offers unified billing, QoS negotiation mechanisms, and the possibility of combining services deployed in different environments like CAMEL and Parlay OSA. With the aim of determining the real limitations...
Resurgence of virtualization calls for suitable benchmark to validate the design of virtualization system. Among the virtual machines' performance, I/O especially disk I/O is the most critical one. Since I/O is a key factor that impacts virtual machine performance, this paper introduces a benchmark-vBench for disk I/O micro-performance evaluation of virtual machine. vBench is mainly consisted of serial...
Heterogeneous data integration plays an important role in the information management system (IMS). Traditional IMS have low integration degree and are difficult to adapt to dynamic changes of databases flexibly. In this paper, we propose a grid service framework for heterogeneous data integration. This framework consists of three layers, including data service layer, data integration layer and data...
The stream control transmission protocol (SCTP) uses a cookie mechanism to tackle the security and traditional attack scenario. Unfortunately, SCTP is not secured against redirection attacks, bombing attacks and towards verification-tag guessing attacks which lead to association-hijacking and may force the victim client to starve out of service from the server. Therefore, we propose a secure SCTP...
Similar to conventional NAT technology, NAT-PT gateways break traditional TCP/IP's end-to-end argument property which result in IPSec can not be applied in NAT-PT environment, and would fall flat when the pool of IPv4 addresses is exhausted. A solution by adding IP transform message, modifying the address mapping tables and session tables, using port transform strategy with inner host computer character...
The rapid growth of diverse wireless communication networks, each with its own unique characteristics, led to proliferation of the wireless heterogeneous network concept. The integration of various networks is not trivial, especially if one targets high performances. Modeling and simulation-based analysis provides sufficient means for performance evaluation, even in the abstract phases of the network...
During the past few years, large, reliable and efficient storage systems have become increasingly important in enterprise environments. Additional requirements for these environments include low installation, maintenance and administration costs. In this paper we propose a hash-based storage approach, combined with block-level operating system semantics. The experimental evaluation confirms that the...
To ensure Quality of Service (QoS) for data centers, it is critical to enforce a fair share of storage resources between competing users. Interposed schedulers are one of the most practical methods for performance isolation. Most fair queuing-based proportional sharing algorithms for existing interposed scheduler are variants of counterparts designed for network routers and may result in breaking...
Multicast conferencing is a rapidly-growing area of Internet use. Audio, video and other media such as shared whiteboard data can be distributed efficiently between groups of conference participants using multicast algorithms that minimize the amount of traffic sent over the network. This is far more effective than systems that maintain a separate link between each participant. On the other hand Peer-to-Peer...
Motivated by performance evaluation of a computer communication system, we consider a renewal input, general service time, single-server, and infinite-capacity queuing system with generally distributed time-out threshold. We obtain two moment approximate formulas for the mean system performance measures (including the mean number of customers in the system and the mean response time) by using the...
Delay/disruption tolerant networking (DTN) has recently been proposed as a very effective solution to cope with the problems posed by challenged networks (long delays, disruptions, absence of end-to-end connectivity, etc.). In order to assess DTN performance in such scenarios, it is essential to be able to rely on specific evaluation tools. In this paper we present DTNperf_2, which is a client-server...
Recently, the video delivery service is spreading along with the penetration of broadband access to residential users. Although content delivery network (CDN) system has been deployed for video delivery, it's costly because equipment reinforcement is needed as a number of client increases. To settle this problem, use of peer-to-peer (P2P) system has been considered, namely P2P live-streaming and P2P-VoD...
The rise in multi-core architectures has led to the abundance of computing resources on a chip. Virtualization has emerged as a way to efficiently partition and share these resources. Thus, the emphasis in micro-architecture design, especially in ??86, has shifted towards providing hardware support for better performance of VMs on bare metal. One of the areas of focus for these efforts is the Translation...
In this paper, we evaluate the performance of peer selection algorithms: MLH (Minimum Logical Hop) and MPH (Minimum Physical Hop) to increase the number of joining peers and to decrease inter-AS traffic volume in P2P live streaming, where we assume that every peer's logical hop count (the number of providing peers between an origin streaming server and the peer) is limited by a predetermined value...
Disk time slicing is a promising technique for storage performance insulation. To work with cluster based storage, however, time slices associated with striped data must be co-scheduled on the corresponding servers. This paper describes algorithms for determining global time slice schedules and mechanisms for coordinating the independent server activities. Experiments with a prototype show that, combined,...
In this paper we present the design and evaluation of a system for deploying highly available and migratable services in shared infrastructures, such as the PlanetLab, where the available resource capacities at a node can fluctuate significantly. A migratable service can monitor its operating conditions and autonomously relocate itself to another node when the available resource capacities at the...
As a prevalent paradigm for flexible, scalable and on-demand provisions of computing services, Cloud computing can be an alternative platform for scientific computing. In this paper, we propose an efficient resource management system for on-line virtual clusters provision, aiming to provide immediately-available virtual clusters for academic users. Particularly, we investigated two crucial problems:...
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