Re: [Duplicity-talk] duplicity and partial rsync transfers

[edgar . soldin]

maybe we should add a --rsync-options switch for advanced users?

..ede

On 31.08.2011 13:30, Kenneth Loafman wrote:
> It would be feasible to help with resuming uploads, but it would have to be a 
> special case for rsync.
> 
> ...Ken
> 
> 
> On Wed, Aug 31, 2011 at 4:11 AM, <address@hidden <mailto:address@hidden>> 
> wrote:
> 
>     I am not familiar enough with the duplicity resume process. Would this be 
> feasible?
> 
>     ede/duply.net <http://duply.net>
> 
> 
>     On 30.08.2011 21:24, Eliot Moss wrote:
>     > On 8/30/2011 1:11 PM, address@hidden <mailto:address@hidden> wrote:
>     >
>     >>> What some respondents are not realizing (because I probably did not
>     >>> make it clear), I am not necessarily talking about the case where
>     >>> duplicity is run a second (or third, or whatever) time, but when the
>     >>> rsync backend has a network problem and tries to send the *same*
>     >>> volume file again.
>     >>
>     >> crystal clear to me.
>     >>
>     >>> --partial would be very reasonable in such a case.
>     >>
>     >> Not all backends support resuming in protocol so it might proof more 
> complex to implement....  Ede / duply.net <http://duply.net>
>     >
>     > Hmmm ... at present it retries the rsync command some
>     > number of times before failing out of duplicity. I am
>     > only suggesting that the rsync back end be set up to
>     > use rsync's --partial feature, merely because it is there
>     > and would work transparently to help file transfer
>     > retry for that back end. I agree that with the diversity
>     > of back ends, there is probably not a general solution
>     > to saving a partial transmission when retrying the
>     > transmission of a volume.  (Some ftp's can restart,
>     > but rsync has the capability to check that the already
>     > transmitted bytes are the same (or similar) and to reuse
>     > what was there before, in rsync's normal way of comparing
>     > source and destination.)
>     >
>     > So I don't think this is at all hard to implement.  All that
>     > is required is to add this to the rsync command line:
>     >
>     >   --partial-dir=.rsync-partial
>     >
>     > Best wishes -- Eliot
> 
>