Re: [Duplicity-talk] --max-blocksize?

[Kenneth Loafman]

ede,

Sure, go ahead.  Thanks!

...Ken

On Sun, Oct 19, 2014 at 11:21 AM, <address@hidden> wrote:

hey Ken,

nicely explained.. want to put that in the manpage?

..ede

On 19.10.2014 18:05, Kenneth Loafman wrote:
> Remy,
>
> Sorry about not getting back to you sooner...
>
> max_blocksize determines the size of the block examined for changes during the diff process.  For files < 1MB the blocksize is a constant of 512.  For files over 1MB the size is given by:
>
>         file_blocksize = int((file_len / (2000 * 512)) * 512)
>         return min(file_blocksize, globals.max_blocksize)
>
> where globals.max_blocksize is defaulted to 2048.  If you specify a larger max_blocksize, your difftar files will be larger, but your sigtar files will be smaller.  If you specify a smaller max_blocksize, the reverse occurs.  The --max-blocksize option should be in multiples of 512.
>
> ...Thanks,
> ...Ken
>
>
> On Wed, Oct 1, 2014 at 2:51 PM, Remy van Elst <address@hidden <mailto:address@hidden>> wrote:
>
>     duplicity --help shows me the following option:
>
>       --max-blocksize=number
>
>     What does it do and in what unit is the "number"? I can only find a
>     launchpad ticket for large files, the man page on the website does not
>     list this option. Is there any more info?
>
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