Remote sensing image contains plenty Geo-information. Issuing the Geo-information on the Internet is abasic component of sharing RS Image's Geo-information. The most important of issuing the information is to orga...Remote sensing image contains plenty Geo-information. Issuing the Geo-information on the Internet is abasic component of sharing RS Image's Geo-information. The most important of issuing the information is to organizeand manage RS image data efficiently according to their characteristics and peculiar Geo-information it them. Accord-ing to the properties of multi-sensor, multi-resolution, multi-spectrum and multi-epoch of RS image data and theirpeculiar Geo-information. This paper has constructed a solid index mechanism of "Pyramid, Block, Layer, Epoch"according to the properties of RS image data and established corresponding logic relation databases for RS image data.The Geo-information of RS image data is reorganized via the solid index mechanism and logic database. Finally, theabove ideas are used in setting up an image database system to provide query and search for Geo-information on theInternet.展开更多
Computerized data has become critical to the survival of an enterprise. Company must have a strategy forrecovering their data should data lose. RAID is a popular mechanism to offer good fault-tolerance. But RAID can n...Computerized data has become critical to the survival of an enterprise. Company must have a strategy forrecovering their data should data lose. RAID is a popular mechanism to offer good fault-tolerance. But RAID can notwork well when one more disks fail. In this paper, we present an efficient Network-based high High-Tolerance Distributed Shared Storage mechanism called FTDSS. FTDSS makes use of disk space of node in Network to build alarge public shared storage space. Users can read/write their file from/to the public storage space from node of net-work Physically File is stored in each node in form of data fragment or XOR verify fragment. Because of redundantXOR fragments, file is available even when two more nodes fail. FTDSS realize distant redundant srorage. At last.this paper use experiment to prove that FTDSS can offer high fault-tolerance and advanced performance.展开更多
文摘Remote sensing image contains plenty Geo-information. Issuing the Geo-information on the Internet is abasic component of sharing RS Image's Geo-information. The most important of issuing the information is to organizeand manage RS image data efficiently according to their characteristics and peculiar Geo-information it them. Accord-ing to the properties of multi-sensor, multi-resolution, multi-spectrum and multi-epoch of RS image data and theirpeculiar Geo-information. This paper has constructed a solid index mechanism of "Pyramid, Block, Layer, Epoch"according to the properties of RS image data and established corresponding logic relation databases for RS image data.The Geo-information of RS image data is reorganized via the solid index mechanism and logic database. Finally, theabove ideas are used in setting up an image database system to provide query and search for Geo-information on theInternet.
文摘Computerized data has become critical to the survival of an enterprise. Company must have a strategy forrecovering their data should data lose. RAID is a popular mechanism to offer good fault-tolerance. But RAID can notwork well when one more disks fail. In this paper, we present an efficient Network-based high High-Tolerance Distributed Shared Storage mechanism called FTDSS. FTDSS makes use of disk space of node in Network to build alarge public shared storage space. Users can read/write their file from/to the public storage space from node of net-work Physically File is stored in each node in form of data fragment or XOR verify fragment. Because of redundantXOR fragments, file is available even when two more nodes fail. FTDSS realize distant redundant srorage. At last.this paper use experiment to prove that FTDSS can offer high fault-tolerance and advanced performance.