creating size-limited tar files

andrea crotti andrea.crotti.0 at gmail.com
Thu Nov 8 11:29:36 CET 2012


2012/11/8 andrea crotti <andrea.crotti.0 at gmail.com>:
>
>
>
> Yes yes I saw the answer, but now I was thinking that what I need is
> simply this:
> tar czpvf - /path/to/archive | split -d -b 100M - tardisk
>
> since it should run only on Linux it's probably way easier, my script
> will then only need to create the list of files to tar..
>
> The only doubt is if this is more or less reliably then doing it in
> Python, when can this fail with some bad broken pipe?
> (the filesystem is not very good as I said and it's mounted with NFS)

In the meanwhile I tried a couple of things, and using the pipe on
Linux actually works very nicely, it's even faster than simple tar for
some reasons..

[andrea at andreacrotti isos]$ time tar czpvf - file1.avi file2.avi |
split -d -b 1000M - inchunks
file1.avi
file2.avi

real	1m39.242s
user	1m14.415s
sys	0m7.140s

[andrea at andreacrotti isos]$ time tar czpvf total.tar.gz file1.avi file2.avi
file1.avi
file2.avi

real	1m41.190s
user	1m13.849s
sys	0m5.723s

[andrea at andreacrotti isos]$ time split -d -b 1000M total.tar.gz inchunks

real	0m55.282s
user	0m0.020s
sys	0m3.553s


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