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I doubt that the different schemes would make a lot of difference to be honest since the compression algorithms typically only look forward a limited amount in order to control memory use. The exception is S3 which would end up larger most likely since compressing a compressed file adds overheads but cannot compress. If you want better compression, look ...


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Short answer: --skip-old-files Longer answer: tar --skip-old-files -xvf aoeu.tar will make tar silently ignore any files that has a corresponding output file. It is also possible to use the -k flag, but this will result in tar throwing an error and cowardly refuse to do anything further. However, I am not sure how a partially extracted file will be treated, ...


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Of course Tar can archive these backups, no matter how many duplicates you have in there. If you have 100 duplicates of file abc.doc in 100 different folders, it will be archived 100 times. That said, it is not efficient. If a backup tool can de-duplicate data, it would recognize those 100 identical files, backup one, and reference it 99 times. If one of ...



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