Compressing Data Files
Overview
By
default, a SAS data file is uncompressed. You can compress your data
files in order to conserve disk space, although some files are not
good candidates for compression. The file structure of a compressed
data file is different from the structure of an uncompressed file.
You use the COMPRESS= data set option or system option to compress
a data file. You use the POINTOBS= data set option to enable SAS to
access observations in compressed files directly rather than sequentially.
You use the REUSE= data set option or system option to specify that
SAS should reuse space in a compressed file when observations are
added or updated.
Review of Uncompressed Data File Structure
By default, a SAS data file is not compressed. ...
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