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A comment on We Need A Standard Layered Image Format. Parent comment

Re:We Need A Standard Layered Image Format by pmahoney on Tuesday April 30, 2013 @09:51PM (#5636015)
It also, unlike tar.gz, provides an index for easily seeking to and extracting just one file from the zip archive. My understanding is that doing this in a .tar.gz means unzipping and processing the whole tarball as a stream.
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Re:We Need A Standard Layered Image Format by derefr on Tuesday April 30, 2013 @10:08PM (#5636059)
Indeed--squashfs was basically created to deal with the inadequacies of random-access-extraction from compressed tarballs.
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