David Birnbaum wrote:
> 
> I've been using BackupPC for several years now, but one problem that I've 
> never 
> come up with a good answer for is when a single large file is too big to 
> transfer completely in the time the backup can run before timing out.  For 
> example, a 10M local datafile, backing up over a 768k upstream DSL, ends up 
> stalling the backup because it can never get past that file.

Did you mean 10 gigs?  10M doesn't sound like it should be a problem.

> Does anyone have a workaround or fix for this?  Is it possible to change 
> BackupPC so it doesn't remove the in-progress file, but instead copies it 
> into 
> the pool so rsync will pick up where it left off last time?  There doesn't 
> seem 
> to be any downside to leaving off on the transfer where it was.

I usually try to get a full over a weekend where it doesn't matter if 
things run into the next day.  Things shouldn't just stop unless you 
have a network problem.

> There is one other problem related to this (and big backups in general) - 
> sometimes, there is enough delay that one of the rsync connections will 
> timeout 
> due to the firewall not seeing activity on the socket.  Is there a way to 
> force 
> some sort of traffic (a bogus keepalive) on the which socket is idle to make 
> sure it doesn't get prematurely severed?
> 
> Any advice would be appreciated.

One approach is to use a VPN connection to the remote site.  Openvpn has 
an option to do keepalives on the line - and to do lzo compression on 
the data.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com


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