Compression

[johanneswerner]

This part needs some clarification. It should be mentioned that compression per file makes sense (of course only if compression makes sense, e.g. fastq -> fastq.gz or sam->bam), however putting the entire ARC into a zip or tar archive should be avoided. First, decompression is necessary anyway whenever any changes or access to the data is necessary, and the gain in saving disk space is small if large files are already compressed. Besides, version control would not make much sense if an ARC would be put into version control as one large file (in that case, Git could only determine that the checksum is different but not what within the ARC has been changed).