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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0995423 (1992-12-21) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 284 인용 특허 : 0 |
A method and apparatus are described for a caching file server (“CFS”) system which permits end user client programs on a local node of a distributed computer system, to issue requests to read/write data to a remote file and to query/set attributes of the remote file, and to have these requests serv
A method and apparatus are described for a caching file server (“CFS”) system which permits end user client programs on a local node of a distributed computer system, to issue requests to read/write data to a remote file and to query/set attributes of the remote file, and to have these requests serviced by the CFS in a way which minimizes the caching resources used as well as minimizes the related network communications. The CFS establishes CFS file programs to interface with the client programs, and sets up a common CFS cache for the file attributes, which cache is kept current via a communications link to a file program in a file server at the remote node containing the file, wherein the file program automatically updates the common CFS cache whenever any attributes change. The CFS also caches the results of bind operations in order to further minimize network calls and redundant cache usage. In addition the CFS coordinates all client program requests for read/write data requests with a virtual memory manager (“VMM”) on the local node, servicing all client programs from a single pager program in the VMM which is coupled to a cache program in the file server of the remote node. VMM page-in/page-out operations go directly to the remote file server without CFS intervention. In this manner, network communications and related processing overhead as well as memory resources may be minimized by use of the VMM for caching file data and the Common CFS cache for caching file attributes.
A computer system having a plurality of computers, each computer having a processor, a memory, and a microkernel operating system, said computer system comprising: a. an extensible file system wherein a new file system can be added to the system without modification to the microkernel operating syst
A computer system having a plurality of computers, each computer having a processor, a memory, and a microkernel operating system, said computer system comprising: a. an extensible file system wherein a new file system can be added to the system without modification to the microkernel operating system; b. a virtual memory manager (VMM) in a computer which can cache data from said new file system; and c. a caching file server (CFS) resident on the computer containing the VMM, said CFS configured to cache file system attributes from said new file system which attributes said VMM cannot cache, said CFS coordinating the caching operations for clients between said CFS and said VMM so that data caching is not duplicated by said CFS and said VMM.
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