COMPUTER PROGRAM PRODUCT, METHOD, APPARATUS AND DATA STORAGE SYSTEM FOR MANAGING DEFRAGMENTATION IN FILE SYSTEMS
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United States of America Patent
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Jan 13, 2015
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Jan 13, 2015
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Aspects of managing defragmentation in a data storage system comprising one or more storage apparatuses and a file system server connected to the one or more storage apparatuses and to one or more host computers are described, comprising: providing free space allocation information; allocating, in response to receiving an update request to update data stored in one or more first storage units of a plurality of storage units, one or more second storage units of the plurality of storage units indicated to be free based on the provided free space allocation information for writing update data of the update request, controlling writing update data to the allocated one or more second storage units, and controlling swapping logical addresses associated with the one or more second storage units with respective logical addresses associated with the one or more first storage units.
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