To improve I/O speed and system performance of network storage devices, a special storage server that is an iSCSI-based network-attached storage server (iSCSI-based network-attached storage server, for short iNAS) is ...To improve I/O speed and system performance of network storage devices, a special storage server that is an iSCSI-based network-attached storage server (iSCSI-based network-attached storage server, for short iNAS) is designed. The iNAS can provide both the file I/O and the block I/O services by an iSCSI module, and it converges with the NAS and the SAN (storage area network). The iNAS improves the I/O speed by the direct data access (zero copy) between the RAID (redundant array of inexpensive disks) controller and the user-level memory. The iNAS integrates the multi-RAID for a single storage pool by a multi-stage stripping device driver, and it implements the storage virtualization. In the experiments, the iNAS has ultra-high-throughput for both the file I/O requests and the block I/O requests.展开更多
A web service wrapping approach for command line programs,which are commonly used in scientific computing,is proposed.First,software architecture for a basic web service wrapper implementation is given and the functio...A web service wrapping approach for command line programs,which are commonly used in scientific computing,is proposed.First,software architecture for a basic web service wrapper implementation is given and the functions of the main components are explained.Then after a comprehensive analysis of data transmission and a job life cycle model,a novel proactive file transmission and job management mechanism is devised to enhance the software architecture,and the command line programs are wrapped into web services in such a way that they can efficiently transmit files,supply instant status feedback and automatically manage the jobs.Experiments show that the proposed approach achieves higher performance with less memory usage compared to the related work, and the usability is also improved.This work has already been put into use in a production system of scientific computing and the data processing efficiency of the system is greatly improved.展开更多
文摘To improve I/O speed and system performance of network storage devices, a special storage server that is an iSCSI-based network-attached storage server (iSCSI-based network-attached storage server, for short iNAS) is designed. The iNAS can provide both the file I/O and the block I/O services by an iSCSI module, and it converges with the NAS and the SAN (storage area network). The iNAS improves the I/O speed by the direct data access (zero copy) between the RAID (redundant array of inexpensive disks) controller and the user-level memory. The iNAS integrates the multi-RAID for a single storage pool by a multi-stage stripping device driver, and it implements the storage virtualization. In the experiments, the iNAS has ultra-high-throughput for both the file I/O requests and the block I/O requests.
基金The National Natural Science Foundation of China(No.60573117)the National Basic Research Program of China(973 Program)(No.2007CB310805)
文摘A web service wrapping approach for command line programs,which are commonly used in scientific computing,is proposed.First,software architecture for a basic web service wrapper implementation is given and the functions of the main components are explained.Then after a comprehensive analysis of data transmission and a job life cycle model,a novel proactive file transmission and job management mechanism is devised to enhance the software architecture,and the command line programs are wrapped into web services in such a way that they can efficiently transmit files,supply instant status feedback and automatically manage the jobs.Experiments show that the proposed approach achieves higher performance with less memory usage compared to the related work, and the usability is also improved.This work has already been put into use in a production system of scientific computing and the data processing efficiency of the system is greatly improved.
