The emergence of high speed wide area networks makes grid computing a reality.However grid applications that need reliable data transfer still have difficulties to achieve optimal TCP performance due to metwork tuning...The emergence of high speed wide area networks makes grid computing a reality.However grid applications that need reliable data transfer still have difficulties to achieve optimal TCP performance due to metwork tuning of TCP window size to imporvethe bandwidth and to reduce latency on a high speed wide area network.This paper presents a pure Java package called JPARSS(java Parallel Secure Stream) that divides data into partitions that are sent over several parallel Java Streams simultaneously and allows Java or Web applications to achieve optimal TCP performance in a gird environment without the necessity of tuning the TCP window size.Several experimental results are provided to show that using parallel stream is more effective than tuning TCP window size.In addition X.509 certificate based single sign-on mechanism and SSL based connection establishment are integrated into this package ,Finally a few applications using this package will be discussed.展开更多
Jefferson Lab has implemented a scalable,distributed,high performance mass storage system-JASMine.The system is entirely implemented in Java,provides access to robotic tape storage and includes disk cache and stage ma...Jefferson Lab has implemented a scalable,distributed,high performance mass storage system-JASMine.The system is entirely implemented in Java,provides access to robotic tape storage and includes disk cache and stage manager components.The disk manager subsystem may be used independently to manage stand-alone disk pools.The system includes a scheduler to provide policy-based access to the storage systems.Security is provided by pluggable authentication modules and is implemented at the network socket level.The tape and disk cache systems have well defined interfaces in order to provids integration with grid-based services.The system is in production and being used to archive 1 TB per day from the experiments.and currently moves over 2 TB per day total.This paper will describe the architecture of JASMine;discuss the rationale for building the system,and present a transparent 3^rd party file replication service to move data to collab-orating institutes using JASMine,XML,and servlet technology interfacing to grid-based file transfer mechanisms.展开更多
文摘The emergence of high speed wide area networks makes grid computing a reality.However grid applications that need reliable data transfer still have difficulties to achieve optimal TCP performance due to metwork tuning of TCP window size to imporvethe bandwidth and to reduce latency on a high speed wide area network.This paper presents a pure Java package called JPARSS(java Parallel Secure Stream) that divides data into partitions that are sent over several parallel Java Streams simultaneously and allows Java or Web applications to achieve optimal TCP performance in a gird environment without the necessity of tuning the TCP window size.Several experimental results are provided to show that using parallel stream is more effective than tuning TCP window size.In addition X.509 certificate based single sign-on mechanism and SSL based connection establishment are integrated into this package ,Finally a few applications using this package will be discussed.
文摘Jefferson Lab has implemented a scalable,distributed,high performance mass storage system-JASMine.The system is entirely implemented in Java,provides access to robotic tape storage and includes disk cache and stage manager components.The disk manager subsystem may be used independently to manage stand-alone disk pools.The system includes a scheduler to provide policy-based access to the storage systems.Security is provided by pluggable authentication modules and is implemented at the network socket level.The tape and disk cache systems have well defined interfaces in order to provids integration with grid-based services.The system is in production and being used to archive 1 TB per day from the experiments.and currently moves over 2 TB per day total.This paper will describe the architecture of JASMine;discuss the rationale for building the system,and present a transparent 3^rd party file replication service to move data to collab-orating institutes using JASMine,XML,and servlet technology interfacing to grid-based file transfer mechanisms.
