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 TitleDate AddedCompany
whitepaper Performance Considerations for Network Switch Fabrics on Linux Clusters0000-00-00 Wayne State University
  In this paper the authors investigate the necessity of a high speed interconnect for Linux based clusters and the performance differences between Myrinet and Ethernet connected networks. The authors benchmark applications and network performance in a dedicated environment with varying workloads and processing elements. The authors show that for certain workloads, a high speed interconnect is not required. The paper also examines the increased complexity of introducing high-speed switch fabrics, the importance of their underlying device drivers, and their usefulness with real applications. Finally, the authors make recommendations as to which network to use given a certain workload and available computation nodes.

Tags: Linux - Open Source, Linux Server OS		   
whitepaper Model Checking an Entire Linux Distribution for Security Violations0000-00-00 University of California
  Software model checking has become a popular tool for verifying programs' behavior. Recent results suggest that it is viable for finding and eradicating security bugs quickly. However, even state-of-the-art model checkers are limited in use when they report an overwhelming number of false positives, or when their lengthy running time dwarfs other software development processes. In this paper, the authors report the experiences with software model checking for security properties on an extremely large scale - an entire Linux distribution consisting of 839 packages and 60 million lines of code.

Tags: Security Management, Linux Server OS		   
whitepaper Full Circle: Simulating Linux Clusters on Linux Clusters0000-00-00 University of Illinois
  BGLsim is a complete system simulator for parallel machines. It is currently being used in hardware validation and software development for the BlueGene/L cellular architecture machine. BGLsim is capable of functionally simulating multiple nodes of this machine operating in parallel. It simulates instruction execution in each node and the communication that happens between nodes. BGLsim allows one to develop, test, and run the exactly same code that will be used in the real system. Using BGLsim, the authors can gather data that helps to debug and enhance software (including parallel software) and evaluate hardware. To illustrate the capabilities of BGLsim, the authors describe experiments running the NAS Parallel Benchmark IS on a simulated BlueGene/L machine. BGLsim is a parallel application that runs on Linux clusters.

Tags: Linux - Open Source, Linux Server OS		   
whitepaper A Performance Comparison of Linux and a Lightweight Kernel0000-00-00 University of New Mexico
  This paper compares running the Linux operating system on the compute nodes of ASCI Red hardware to running a specialized, highly-optimized LightWeight Kernel (LWK) operating system. The authors have ported Linux to the compute and service nodes of the ASCI Red supercomputer, and have run several benchmarks. The paper presents performance and scalability results for Linux compared with the LWK environment. To the knowledge, this is the first direct comparison on identical hardware of Linux and an operating system designed specifically for large-scale supercomputers. In addition to presenting these results, it will discuss the limitations of both operating systems, in terms of the empirical evidence as well as other important factors.

Tags: Linux Server OS		   
whitepaper The Virtual Processor Interface: Linux Kernel Support for User-Level Thread Systems0000-00-00 University of San Francisco
  Despite an increasing need for thread support in language run-time systems and parallel libraries such as in Java and OpenMP, there is limited support for custom, multiprocessor capable, user-level thread systems in the Linux kernel. To address this lack of support the authors have developed the Virtual Processor Interface (VPI) for Linux. The VPI implementation consists of a small set of kernel modifications and new system calls combined with a small user-level library that provide an interface that can be used to build thread systems. This paper describes VPI and the implementation. The authors have implemented a complete thread system using VPI, called VPIthreads, and compare its performance to that of current user-level and kernel-level thread systems.

Tags: Linux Server OS		   
whitepaper Build Object-Based Filesystem Into Linux: Technical Report (LCX-SSRC-2002-09)0000-00-00 University of California
  The OBFS(Object-Based FileSystem) is a new filesystem designed for OBSD(Object-Based Storage Device). The performance of OBFS is two times as good as that of EXT2 and is better than some other filesystems, such as XFS, when OBFS is designed as a separate filesystem, but not a filesystem under VFS(Virtual Filesystem) of Linux. In order to have a fair comparison to EXT2 and other filesystems under Linux, the authors want to build the OBFS into the Linux. This paper describes the design and implementation of building OBFS into the Linux2.4.9 as a specific filesystem under VFS. The source code of OBFS only contains 4 source files, 5 head files, and about 2000 lines of source.

Tags: Linux - Open Source, Linux Server OS		   
whitepaper Using HP Insight Control Linux Edition in the Same Environment as HP Systems Insight Manager and HP Rapid Deployment Pack2007-04-01 Hewlett-Packard (HP)
  This white paper also describes some considerations involved in using these products, particularly from a management network standpoint. These products might contend for the same network services if one does not configure the network properly. Presently, Insight Control Linux Edition supports only HP BladeSystem c-Class and p-Class server blades, so the server resources most relevant to the discussion in this white paper are HP server blades.

Tags: Blades, Linux Server OS		   
whitepaper Bridging the Technology Gap With HP Integrity Solutions for Radiology: Winning With HP Integrity Running Linux and Siemens Syngo Workflow2007-04-01 Hewlett-Packard (HP)
  When choosing the best technology to support the requirements of a 21st century RIS, HP Integrity servers running Linux deliver the outstanding performance and economics needed to supercharge critical radiology applications while reducing total cost of ownership. HP offers unparalleled depth knowledge and experience in Linux and the 64-bit HP Integrity servers. Radiology information systems, solutions for paperless and film-less workflow, optimize workflow with all relevant patient data at a glance. Siemens syngo Workflow not only integrates with healthcare information systems, but also has the unique ability to combine its clinical information with Siemens Medical Imaging solutions.

Tags: Linux Server OS, Application Development		   
whitepaper Best Practices for Bare Metal Provisioning of Linux Using Oracle Enterprise Manager 10g2007-04-01 Oracle
  Proliferation of low cost servers in the data centers has brought in a fresh set of management challenges. The well acknowledged problems include the difficulty in managing consistency and compatibility across operating system and software deployments, server drifts and security vulnerabilities that lead to lack of compliance, difficulty in deploying software, difficulty in provisioning new servers with variety of configurations and applications, high cost of operation and difficulty in adapting to changes in workload of the environment. These lead to system administrators and DBAs spending significant amount of their time in software and server provisioning operations. Bare Metal Provisioning Application provides server lifecycle management capabilities that enable one to build manage and optimize their server infrastructure.

Tags: Linux - Open Source, Linux Server OS		   
whitepaper MetaTM/TxLinux: Transactional Memory for an Operating System2007-03-30 Association for Computing Machinery
  This paper quantifies the effect of architectural design decisions on the performance of TxLinux. TxLinux is a Linux kernel modified to use transactions in place of locking primitives in several key subsystems. The authors run TxLinux on MetaTM, which is a new Hardware Transaction Memory (HTM) model. MetaTM contains features that enable efficient and correct interrupt handling for an x86-like architecture. Live stack overwrites can corrupt non-transactional stack memory and requires a small change to the transaction register checkpoint hardware to ensure correct operation of the operating system. The paper also proposes stack-based early release to reduce spurious conflicts on stack memory between kernel code and interrupt handlers.

Tags: Linux Server OS		   


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