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Re: [Duplicity-talk] Transfer performance drops sharply after a few hour

From: Carlos Chavez
Subject: Re: [Duplicity-talk] Transfer performance drops sharply after a few hours
Date: Thu, 02 Oct 2014 12:30:56 -0500
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We have two 200Mbps links to the Internet (business grade with "guaranteed" speeds) in our office and both show the same performance drop after an hour or so. We do not have any other application that needs that much bandwidth for an extended period of time so I cannot say for sure my ISP is doing something. We used to have two separate servers until few weeks ago and both finished their full backups in a few hours (one had a 10Mbps connection and the other a 100Mbps connection). Now that we are using a single server it can take up to two days to complete a full backup. The old servers used older versions of Duplicity so maybe I will try downgrading to see if that affects the transfer before getting into a shouting match with my ISP.

On 10/2/14, 12:15 PM, Scott Hannahs wrote:
Bandwidth shaping by your ISP?  You state a 200 mbps link, but that may only be 
for short periods, the ISPs very rarely mention that this is not sustained 


On Oct 2, 2014, at 13:00, Carlos Chavez <address@hidden> wrote:

    I am using duplicity to backup a remote server over the Internet.  A full 
backup is about 150GB.  The remote server has a 1gbps link to the INternet and 
the server in our office has a symetric 200mbps link.  When I start the backup 
I can see the first transfers using all the available bandwidth but after a few 
hours it drops and the rest of the transfers only use around 6mbps.  Because of 
that the full backup can take days to complete which makes things difficult.

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