Re: [BackupPC-users] Ssh/Rsync transfer fails intermittently

Ok, I verified it, whatever one does, the ssh connection is terminated after 1h1'. So the only "solution" to this would be to have backuppc retry again and again until the sum of the files is transfered, and the final backup is successful :).

Maybe I can simulate this behavior by setting

$Conf{IncrPeriod} = 0.03;

(roughly every 40 minutes) for the first copy of the files, and then reset it back to the default 0.97.

Chris Mavrakis
cmavrakis.com

On Sun, Mar 4, 2012 at 11:15 AM, Chris Mavrakis <cmavr8 AT gmail DOT com> wrote:

Thanks.. Maybe it's one of the things Tim said (firewall/ssh limit), but I can't influence these settings as the remote server is on a shared hosting plan. (my own firewall is ok) I have no control over sshd_config etc... or the remote routers/firewall.

I also tried to add in the rsync command : -o ServerAliveInterval=15 -o ServerAliveCountMax=10.

Could we just tell BackupPC to retry a few times even if the connection is terminated? If I manually issue backup commands one after the other (after each failure, every 1h1') I eventually get a full back-up of the remote host. But it would be nice to have Backuppc do it automatically.

Chris Mavrakis
cmavrakis.com

On Sun, Mar 4, 2012 at 5:48 AM, Les Mikesell <lesmikesell AT gmail DOT com> wrote:

On Sat, Mar 3, 2012 at 5:40 PM, Chris Mavrakis <cmavr8 AT gmail DOT com> wrote:
> BackupPC works good on my LAN but has problems backing-up a remote server of
> mine. I'm using rsync over ssh and have increased max ping to 500 because
> the remote server is far away.
>
> Almost always the transfer is ending after 1h01'or 1h02'. These values in
> seconds are 3660 and 3720. Maybe they appear in some option...?
>
> If I manually login to this remote ssh server, and leave my terminal
> untouched for 1h26" I get disconnected. Looks like this is the reason
> BackupPC gets disconnected, too. Is there any way to simulate the execution
> of commands inside BackupPC's session?
>
> What I've tried and didn't work:
>
> - ServerAliveInterval=300, ServerAliveInterval=60
>
> - increased PingMaxMsec to 500
>
> - rsync options --timeout and --contimeout set to 20 and 200 seconds (both
> values tried on both options)
>
> - removing block-size option from rsync
>
> Nothing worked. It usually stops in different files, independently of their
> size.

I'd expect the ssh ServerAliveInterval to fix the most likely cases of
idle timeout on nat routers or firewalls. Maybe something has an
absolute connection length timeout. Do you have access to the
routers at either or both ends?

--
Les Mikesell
lesmikesell AT gmail DOT com

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Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
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------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing 
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/

_______________________________________________
BackupPC-users mailing list
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List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
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