creating size-limited tar files

Neil Cerutti neilc at norwich.edu
Wed Nov 7 19:40:14 CET 2012


On 2012-11-07, andrea crotti <andrea.crotti.0 at gmail.com> wrote:
> Simple problem, given a lot of data in many files/directories, I
> should create a tar file splitted in chunks <= a given size.
>
> The simplest way would be to compress the whole thing and then split.
>
> At the moment the actual script which I'm replacing is doing a
> "system('split..')", which is not that great, so I would like to do it
> while compressing.
>
> So I thought about (in pseudocode)
>
> while remaining_files:
>     tar_file.addfile(remaining_files.pop())
>     if size(tar_file) >= limit:
>          close(tar_file)
>          tar_file = new_tar_file()
>

I have not used this module before, but what you seem to be
asking about is:

TarFile.gettarinfo().size

But your algorithm stops after the file is already too big.

-- 
Neil Cerutti


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