Greetings,<br><br>I posted this at serverfault, but in hopes that the people on this list are different from the people there, here it is:<br><br><p>Update: 9/20/10: Updated the EC2 AMI on both the client and the
server and ran a 3-box test with 2 clients downloading from 1 server
over 24 hours. Upon test completion, the logs had zero errors so I
began replacing other instances with the updated AMI instances. After a
weekend of running the 35-40ish clients, I have logs once again filled
with:</p>
2010/09/20 16:27:01 [18581] rsync error: error in rsync protocol data stream (code 12) at io.c(601) [Receiver=3.0.7]
2010/09/20 16:30:01 [18627] rsync error: unexplained error (code 255) at io.c(601) <br><p>Is it unreasonable to have 35-40 clients connect to an rsync server simultaneously? Is this possibly a load issue?</p><br><br><br>
<br><div class="gmail_quote">On Thu, Sep 16, 2010 at 11:04 AM, J. T. Gray <span dir="ltr"><<a href="mailto:jtg@intarcorp.com">jtg@intarcorp.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Added --bwlimit=150 at 10:58, had a success at 10:59, failure at 11:00, and success at 11:01.<br><br>It takes about 1.7s to execute the rsync command, for what that's worth.<br><br>That it seems to fail immediately suggests it's something connection-related, but that it fails on rsh and ssh both suggests it's something specific to the client app. I'm currently updating my EC2 image to see if it's specific to the build of Ubuntu I'm using.<div>
<div></div><div class="h5"><br>
<br><br><br><div class="gmail_quote">On Thu, Sep 16, 2010 at 10:54 AM, Mac User FR <span dir="ltr"><<a href="mailto:macuserfr@free.fr" target="_blank">macuserfr@free.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Already tried --bwlimit. In my case it didn't change the error. It just slowed down the identical file recognition. But when it came to a file modified from what exist on the backup server, it dropped the connection.<br>
<br>
Thanks anyway for the help!<br>
<br>
Vitorio<br>
<br>
Le 16 sept. 10 à 15:56, Paul Slootman a écrit :<div><div></div><div><br>
<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
On Thu 16 Sep 2010, Mac User FR wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
I read somewhere that the ssh connection was stronger than rsync one<br>
in unstable networks. And effectively, if I run rsync via ssh ( -e<br>
option), the transfer happen without errors, on the same computer<br>
using the same networking setup.<br>
</blockquote>
<br>
I wouldn't be surprised that the extra overhead related to ssh slows the<br>
transfer sufficiently to make a flakey network connection not give up.<br>
Perhaps try rate-limiting the rsync transfer.<br>
<br>
<br>
Paul<br>
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