| 摘要 |
PCT No. PCT/US92/04939 Sec. 371 Date Nov. 28, 1994 Sec. 102(e) Date Nov. 28, 1994 PCT Filed Jun. 3, 1992 PCT Pub. No. WO93/24890 PCT Pub. Date Dec. 9, 1993Network Distributed Caches ("NDCs") (50) permit accessing a named dataset stored at an NDC server terminator site (22) in response to a request submitted to an NDC client terminator site (24) by a client workstation (42). In accessing the dataset, the NDCs (50) form a NDC data conduit (62) that provides an active virtual circuit ("AVC") from the NDC client site (24) through intermediate NDC sites (26B, 26A) to the NDC server site (22). Through the AVC provided by the conduit (62), the NDC sites (22, 26A and 26B) project an image of the requested portion of the named dataset into the NDC client site (24) where it may be either read or written by the workstation 42. The NDCs (50) maintain absolute consistency between the source dataset and its projections at all NDC client terminator sites (24, 204B and 206) at which client workstations access the dataset. Channels (116) in each NDC (50) accumulate profiling data from the requests to access the dataset for which they have been claimed. The NDCs (50) use the accumulated profile data stored in channels (116) to anticipate future requests to access datasets, and, whenever possible, prevent any delay to client workstations in accessing data by asynchronously pre-fetching the data in advance of receiving a request from a client workstation.
|
