Santa Clara University

Displaying 1-13 of 13 results

  • White Papers // Jan 2011

    Generalized Reed Solomon Codes for Erasure Correction in SDDS

    Scalable Distributed Data Structures (SDDS) need scalable availability. This can be provided through replication, which is storage intensive, or through the use of Erasure Correcting Codes (ECC) to provide redundancy, which is more complicated. The authors calculate availability under both strategies and show that redundancy through use of an ECC...

    Provided By Santa Clara University

  • White Papers // Nov 2010

    Self-Adjusting Two-Failure Tolerant Disk Arrays

    While flash and Storage Class Memory (SCM) technologies stand to replace magnetic disk technology as the mainstay for high end applications, the sheer amount of data to be stored, the attractive cost-to-capacity ratios of disks, and the high streaming throughput in comparison with not only tape but also with high-end...

    Provided By Santa Clara University

  • White Papers // Jun 2010

    Measures for Maximal Utilization of a Secure Wireless Sensor Network

    The authors come across a lot of scenarios where the authors wish to monitor every occurrence of a particular event remotely. For example, consider a battlefield wherein the footsteps of the enemy contingent are to be tracked. Or, let's take a more humane scenario of a forest wherein a team...

    Provided By Santa Clara University

  • White Papers // May 2010

    Improving Disk Array Reliability Through Expedited Scrubbing

    Disk scrubbing periodically scans the contents of a disk array to detect the presence of irrecoverable read errors and reconstitute the contents of the lost blocks using the built-in redundancy of the disk array. The authors address the issue of scheduling scrubbing runs in disk arrays that can tolerate two...

    Provided By Santa Clara University

  • White Papers // Mar 2010

    Dancing With The Enemy: Can China Be A Viable Alternative For U.S. Investors?

    This paper examines the impact of Global Financial Crisis on the United States of America vs. China. Specifically, the authors contend that despite the relatively higher risks related to investing in China, U.S. individuals would benefit from increased investment in this market due to its strong economic indicators and growth...

    Provided By Santa Clara University

  • White Papers // Jan 2010

    Availability in Global Peer-to-Peer Storage Systems

    The recent popularity of Peer-to-Peer (P2P) systems for file sharing has led to increased demand for higher data availability from such systems. Measurements of popular P2P systems indicate that a large number of hosts appear to be available on a cyclic basis, and their availability shows great heterogeneity. This paper...

    Provided By Santa Clara University

  • White Papers // Jan 2010

    Dynamic Scheduling of PCF Traffic in an Unstable Wireless LAN

    Wireless LANs are increasingly popular and are being used for a wide variety of applications. In order to accommodate the demands of real-time services and multimedia based applications, the authors try to increase the performance and efficiency of the MAC scheduling protocol for the Point Coordination Function (PCF). PCF is...

    Provided By Santa Clara University

  • White Papers // Sep 2009

    Protecting Against Rare Event Failures in Archival Systems

    Digital archives are growing rapidly, necessitating stronger reliability measures than RAID to avoid data loss from device failure. Mirroring, a popular solution, is too expensive over time. The authors present a compromise solution that uses multi-level redundancy coding to reduce the probability of data loss from multiple simultaneous device failures....

    Provided By Santa Clara University

  • White Papers // Sep 2009

    Building Flexible, Fault-Tolerant Flash-Based Storage Systems

    Adding flash memory to the storage hierarchy has recently gained a great deal of attention in both industry and academia. Decreasing cost, low power utilization and improved performance has sparked this interest. Flash reliability is a weakness that must be overcome in order for the storage industry to fully adopt...

    Provided By Santa Clara University

  • White Papers // Sep 2009

    A Spin-Up Saved Is Energy Earned: Achieving Power-Efficient, Erasure-Coded Storage

    Storage accounts for a significant amount of a data center's ever increasing power budget. As a consequence, energy consumption has joined performance and reliability as a dominant metric in storage system design. In this paper, the authors show that the structure of an erasure code - which is generally used...

    Provided By Santa Clara University

  • White Papers // Jun 2009

    Government Support For Terrorism Insurance

    This paper examines the recent market for terrorism insurance, detailing the history and goals of the United States Terrorism Risk Insurance Act (TRIA) in all its iterations. Reinsurance, coverage, reimbursement, and liability are discussed in the context of the Act, as well as benefits and consequences of government-support terrorism insurance....

    Provided By Santa Clara University

  • White Papers // Dec 2008

    LTE and WiMAX Comparison

    Two emerging technologies, the IEEE 802.16 WiMAX (Worldwide Interoperability for Microwave Access) and the 3GPP LTE (Third Generation Partnership Project Long Term Evolution) aim to provide mobile voice, video and data services by promoting low cost deployment and service models through Internet friendly architectures and protocols. Both these technologies are...

    Provided By Santa Clara University

  • White Papers // Nov 2008

    When MTTDLs Are Not Good Enough: Providing Better Estimates of Disk Array Reliability

    While Mean Time To Data Loss (MTTDL) provides an easy way to estimate the reliability of redundant disk arrays, it fails to take into account the relatively short lifetime of these arrays. The authors analyzed five different disk array organizations and compared the reliability estimates obtained using their mean times...

    Provided By Santa Clara University

  • White Papers // Nov 2010

    Self-Adjusting Two-Failure Tolerant Disk Arrays

    While flash and Storage Class Memory (SCM) technologies stand to replace magnetic disk technology as the mainstay for high end applications, the sheer amount of data to be stored, the attractive cost-to-capacity ratios of disks, and the high streaming throughput in comparison with not only tape but also with high-end...

    Provided By Santa Clara University

  • White Papers // May 2010

    Improving Disk Array Reliability Through Expedited Scrubbing

    Disk scrubbing periodically scans the contents of a disk array to detect the presence of irrecoverable read errors and reconstitute the contents of the lost blocks using the built-in redundancy of the disk array. The authors address the issue of scheduling scrubbing runs in disk arrays that can tolerate two...

    Provided By Santa Clara University

  • White Papers // Dec 2008

    LTE and WiMAX Comparison

    Two emerging technologies, the IEEE 802.16 WiMAX (Worldwide Interoperability for Microwave Access) and the 3GPP LTE (Third Generation Partnership Project Long Term Evolution) aim to provide mobile voice, video and data services by promoting low cost deployment and service models through Internet friendly architectures and protocols. Both these technologies are...

    Provided By Santa Clara University

  • White Papers // Jan 2010

    Availability in Global Peer-to-Peer Storage Systems

    The recent popularity of Peer-to-Peer (P2P) systems for file sharing has led to increased demand for higher data availability from such systems. Measurements of popular P2P systems indicate that a large number of hosts appear to be available on a cyclic basis, and their availability shows great heterogeneity. This paper...

    Provided By Santa Clara University

  • White Papers // Jan 2010

    Dynamic Scheduling of PCF Traffic in an Unstable Wireless LAN

    Wireless LANs are increasingly popular and are being used for a wide variety of applications. In order to accommodate the demands of real-time services and multimedia based applications, the authors try to increase the performance and efficiency of the MAC scheduling protocol for the Point Coordination Function (PCF). PCF is...

    Provided By Santa Clara University

  • White Papers // Jun 2009

    Government Support For Terrorism Insurance

    This paper examines the recent market for terrorism insurance, detailing the history and goals of the United States Terrorism Risk Insurance Act (TRIA) in all its iterations. Reinsurance, coverage, reimbursement, and liability are discussed in the context of the Act, as well as benefits and consequences of government-support terrorism insurance....

    Provided By Santa Clara University

  • White Papers // Jun 2010

    Measures for Maximal Utilization of a Secure Wireless Sensor Network

    The authors come across a lot of scenarios where the authors wish to monitor every occurrence of a particular event remotely. For example, consider a battlefield wherein the footsteps of the enemy contingent are to be tracked. Or, let's take a more humane scenario of a forest wherein a team...

    Provided By Santa Clara University

  • White Papers // Mar 2010

    Dancing With The Enemy: Can China Be A Viable Alternative For U.S. Investors?

    This paper examines the impact of Global Financial Crisis on the United States of America vs. China. Specifically, the authors contend that despite the relatively higher risks related to investing in China, U.S. individuals would benefit from increased investment in this market due to its strong economic indicators and growth...

    Provided By Santa Clara University

  • White Papers // Sep 2009

    Protecting Against Rare Event Failures in Archival Systems

    Digital archives are growing rapidly, necessitating stronger reliability measures than RAID to avoid data loss from device failure. Mirroring, a popular solution, is too expensive over time. The authors present a compromise solution that uses multi-level redundancy coding to reduce the probability of data loss from multiple simultaneous device failures....

    Provided By Santa Clara University

  • White Papers // Sep 2009

    Building Flexible, Fault-Tolerant Flash-Based Storage Systems

    Adding flash memory to the storage hierarchy has recently gained a great deal of attention in both industry and academia. Decreasing cost, low power utilization and improved performance has sparked this interest. Flash reliability is a weakness that must be overcome in order for the storage industry to fully adopt...

    Provided By Santa Clara University

  • White Papers // Sep 2009

    A Spin-Up Saved Is Energy Earned: Achieving Power-Efficient, Erasure-Coded Storage

    Storage accounts for a significant amount of a data center's ever increasing power budget. As a consequence, energy consumption has joined performance and reliability as a dominant metric in storage system design. In this paper, the authors show that the structure of an erasure code - which is generally used...

    Provided By Santa Clara University

  • White Papers // Jan 2011

    Generalized Reed Solomon Codes for Erasure Correction in SDDS

    Scalable Distributed Data Structures (SDDS) need scalable availability. This can be provided through replication, which is storage intensive, or through the use of Erasure Correcting Codes (ECC) to provide redundancy, which is more complicated. The authors calculate availability under both strategies and show that redundancy through use of an ECC...

    Provided By Santa Clara University

  • White Papers // Nov 2008

    When MTTDLs Are Not Good Enough: Providing Better Estimates of Disk Array Reliability

    While Mean Time To Data Loss (MTTDL) provides an easy way to estimate the reliability of redundant disk arrays, it fails to take into account the relatively short lifetime of these arrays. The authors analyzed five different disk array organizations and compared the reliability estimates obtained using their mean times...

    Provided By Santa Clara University