[Duplicity-talk] Can one safely run multiple instances to the same target?

[Eric B.]

I am trying to set up my cron job to run duplicity at specified intervals. 
One question that comes to mind which is a concern is what happens if a 
second instance of duplicity is launched with the same parameter list before 
the first is completed?  Does duplicity use a semaphore system (ie: lock 
file, etc) to ensure that two instances aren't trying to write to the target 
at the same time?  If not, should there be something?

I will code my duplicity calling script to use a lockfile to ensure that 2 
crons aren't launched simultaneously, but think that this might be something 
of interest to add to v0.5.  A couple of quick tests I ran, launching the 
same duplicity command with the same parameters simultaneously, came back 
with duplicity crashes.

Thanks,

Eric