sparse file

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sparse file

A file format that saves storage space by recording only actual data. Whereas regular files record empty fields as blank data or runs of nulls, a sparse file includes meta-data that describe where the runs of non-data are located. The reported file size is always the size of the entire file. See null, file system and variable length record.
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However some disadvantages have been identified for rsync such as difficulty to manage large-sized files and also an inefficient managing process for sparse files [5].
The late Justice Thurgood Marshall's sparse files on the Detroit newspapers joint operating agreement offer tantalizing clues that jibe with speculation about the recusal in an upcoming book devoted to the tangled Detroit JOA fight.