1
Yikang Xu, Uresh K Vahalia, Xiaoye Jiang, Uday Gupta, Percy Tzelnic: File server system using file system storage, data movers, and an exchange of meta data among data movers for file locking and direct access to shared file systems. EMC Corporation, Howrey Simon Arnold & White, November 27, 2001: US06324581 (842 worldwide citation)

A plurality of data mover computers control access to respective file systems in data storage. A network client serviced by any of the data movers can access each of the file systems. If a data mover receives a client request for access to a file in a file system to which access is controlled by ano ...


2
Percy Tzelnic, Scott R Dunham: On-line tape backup using an integrated cached disk array. EMC Corporation, Arnold White & Durkee, October 27, 1998: US05829046 (364 worldwide citation)

A video file server includes an integrated cached disk array storage subsystem and a plurality of stream server computers linking the cached disk array to a data network for the transfer of video data streams. The video file server further includes a controller server for applying an admission contr ...


3
Natan Vishlitzky, Robert Wilson, Percy Tzelnic: Prefetching to service multiple video streams from an integrated cached disk array. EMC Corporation, Arnold White & Durkee, April 7, 1998: US05737747 (352 worldwide citation)

A video file server includes an integrated cached disk array storage subsystem and a plurality of stream server computers linking the cached disk storage subsystem to the data network for the transfer of video data streams. The video file server further includes a controller server for applying an a ...


4
Uresh K Vahalia, Uday Gupta, Betti Porat, Percy Tzelnic: Network file server sharing local caches of file access information in data processors assigned to respective file systems. EMC Corporation, John M Gunther Esq, William R Clark Esq, February 20, 2001: US06192408 (282 worldwide citation)

A network file server includes a first set of data processors for receiving requests from clients, and a second set of data processors for accessing read-write file systems. A respective data processor in the second set is assigned to each file system for exclusive management of read and write locks ...


5
Uresh K Vahalia, John Forecast, Percy Tzelnic: Video file server maintaining sliding windows of a video data set in random access memories of stream server computers for immediate video-on-demand service beginning at any specified location. EMC Corporation, Arnold White & Durkee, August 3, 1999: US05933603 (256 worldwide citation)

A video file server includes an integrated cached disk array storage subsystem and a plurality of stream server computers linking the cached disk storage subsystem to a data network for the transfer of video data streams. The video file server further includes a server controller for applying an adm ...


6
Percy Tzelnic, Uresh K Vahalia, Dennis P J Ting, Uday Gupta: Network file server using a cached disk array storing a network file directory including file locking information and data mover computers each having file system software for shared read-write file access. EMC Corporation, Arnold White & Durkee, September 7, 1999: US05948062 (241 worldwide citation)

For network file access, a plurality of data mover computers are linked to a cached disk array. Read-write files stored in the cached disk array are accessible to network clients through more than one of the data mover computers so that the data mover computers are not a bottleneck to file access. T ...


7
Xiaoye Jiang, Uresh K Vahalia, Uday Gupta, Percy Tzelnic: File server system using connection-oriented protocol and sharing data sets among data movers. EMC Corporation, Howrey Simon Arnold & White, September 17, 2002: US06453354 (209 worldwide citation)

A first data mover computer services data access requests from a network client, and a second data mover computer is coupled to the first data mover computer for servicing data access requests from the first data mover computer. The first data mover computer uses a connection-oriented protocol to ob ...


8
Uresh K Vahalia, Uday Gupta, Betti Porat, Percy Tzelnic: File server having a file system cache and protocol for truly safe asynchronous writes. EMC Corporation, Arnold White & Durkee, April 6, 1999: US05893140 (208 worldwide citation)

A conventional network file server has a file system that permits file attributes and file data to be written in any order. The conventional network file server may also support an asynchronous write protocol, in which file attributes and file data need not be written to disk storage until a client ...


9
Percy Tzelnic, Scott R Dunham: Computer data storage physical backup and logical restore. EMC Corporation, Howrey Simon Arnold & White, April 2, 2002: US06366987 (197 worldwide citation)

A data storage system is constructed to rapidly respond to a physical backup request for backup of a physical storage unit such as a disk volume or cylinder. A user, however, may request backup of a logical data structure such as a file having a rather complex mapping to a number of physical storage ...


10
Lev Vaitzblit, Kadangode K Ramakrishnan, Percy Tzelnic: Scheduling and admission control policy for a continuous media server. Digital Equipment, A Sidney Johnston, Christine M Kuta, June 18, 1996: US05528513 (194 worldwide citation)

A scheduler with admissions control in a continuous media file server is presented. The scheduler supports multiple classes of tasks with diverse performance requirements. The scheduler is based on a combination of rate-monotonic and weighted round-robin scheduling schemes. Scheduling is accomplishe ...