Electrical computers and digital processing systems: multicomput – Remote data accessing – Accessing a remote server
Patent
1996-11-13
1999-09-07
Maung, Zarni
Electrical computers and digital processing systems: multicomput
Remote data accessing
Accessing a remote server
709202, 709203, 709220, 709229, 707 10, 707205, 711100, 711111, H04N 714, H04N 7173
Patent
active
059480629
ABSTRACT:
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. The cached disk array stores a network file directory including file locking information, and the data mover computers each have file system software that accesses the network file directory for shared read-write file access. The data mover computers perform the file system tasks such as managing the file directory for mapping of file names to logical blocks and for locking and unlocking of the files in order to minimize loading on the cached disk array. Therefore, the network file server need not use any particular one of the data mover computers to serve as a control point for read-write file access. Instead, file system software for managing the file directory is replicated in each data mover computer. The cached disk array recognizes logical block addresses, and the cached disk array has a limited internal locking facility ensuring that reading or writing to a logical block is an atomic operation. Preferably the data mover computers are commodity personal computers.
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Gupta Uday
Ting Dennis P.J.
Tzelnic Percy
Vahalia Uresh K
Barot Bharat
EMC Corporation
Maung Zarni
LandOfFree
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