Grid storage system and method of operating thereof

Details Grid storage system and method of operating thereof Grid storage system and method of operating thereof

2010-02-11

2011-12-13

Beausoliel, Jr., Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

Reexamination Certificate

active

08078906

ABSTRACT:
There is provided a storage system comprising a plurality of disk units adapted to store data at respective ranges of logical block addresses (LBAs), said addresses constituting an entire address space, and a storage control grid operatively connected to the plurality of disk units and comprising a plurality of data servers, each server comprising operatively coupled cache memory and non-volatile memory. The method of operating the storage system comprises: a) configuring a first server among said plurality of data servers to have a primary responsibility for handling requests directed to a certain range of LBAs; b) continuously obtaining by the first server, information indicative of configuration and/or changes thereof related to said certain data range, thus giving rise to configuration metadata; c) saving said configuration metadata and/or derivatives thereof at one or more disk units among said plurality of disk units in accordance with a predefined criterion; d) continuously saving in cache memory of the first server said configuration metadata obtained between said savings at disk units, thus giving rise to recent configuration changes metadata; e) destaging the recent configuration changes metadata to non-volatile memory of the first server if the first server fails.

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