Method and system for storing metadata of log-structured file system

Abstract

A method, system and computer-readable recording medium for storing metadata of a log-structured file system. The method includes receiving a block management request signal including information about a block number and indicating whether it is an allocation request or a deallocation request for a block, calculating a segment number to which the block belongs with reference to the block number, obtaining a metadata segment usage (MSU) item corresponding to the segment number, wherein the metadata segment usage (MSU) item includes information about a segment number and a number of valid blocks, and increasing the number of valid blocks of the metadata segment usage (MSU) item by one when the block management request signal corresponds to the allocation request, and decreasing the number of valid blocks of the metadata segment usage (MSU) by one item when the block management request signal corresponds to the deallocation request.

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