> On Aug 29, 2016, at 6:13 AM, Steffen Nurpmeso <stef...@sdaoden.eu> wrote: > > I've changed it back to how it was all the time, and only use "| > xargs -0 tar -r -f $ar", adding the compression step later on.
The -r option is pretty expensive; it has to read the entire existing archive from the beginning to identify the end of the last entry, then it can write new entries from that point (overwriting any final padding). If you want to select the files with a separate mechanism, then you really should use -I or -T or list= or other equivalent option (depending on the particular tar implementation you're using). (Also, be careful to not include directories in your generated file list -- tar by default will walk those directories and include all the contents, which can result in many duplicate copies.) Cheers, Tim
