[AusNOG] Slow Transit?

[Damien Gardner Jnr]

Hmm, that sounds like you haven't tuned window sizes in the kernel on both
ends (but in particular on the sending system) to speed it up?  The default
on a lot of recent distro's seems to be pretty horrendous, and seems to be
set out of the box to what ends up being around 9k window size. (so every
9kbyte transferred requires waiting on an ack - so 15msec per 9kbytes gives
you around 600kbytes/sec.  Which it sounds might be about what you're
getting.   If you can tune that up past the 60k mark or higher, then you'd
push it to 4mbytes/sec or more.

Or perhaps change to using NFS over UDP so you don't have the need for as
many ack's..?


On 24 December 2014 at 18:50, ANSA SERVERS <info at ausnetservers.net.au>
wrote:

>  Hey guys,
>
>  Is anyone aware of any issues between VOCUS in Sydney across to Equinox
> and down to Softlayer in Melbourne.
>
>  Been trying to move cloned hard disk images from servers at Glovine to a
> NFS server at Softlayer but its taken over a day to move 100GB which is
> delaying the second leg to new servers in Melbourne ME1
>
>  It started off at a good speed then took a nose dive. I have been
> speaking to softlayers noc team and we have been running mtrs and
> traceroutes as well as test the servers I/O capacity  and download speeds
> at softlayer but still we can not find the issue.
>
>  P.S: Glovine is stating there is nothing their end but havent provided
> any evidence as of yet, but wanted to rule out any other sources before i
> advise them that everything else is clear
>
>  MTRs and Traceroutes are to follow
>
>  If i don't speak to you all before tomorrow Merry Christmas
>
>  Regards,
>
>
>
> *Matthew Matters  *Managing Director / CEO of Aus Net Servers Australia
> Pty Ltd
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-- 

Damien Gardner Jnr
VK2TDG. Dip EE. GradIEAust
rendrag at rendrag.net -  http://www.rendrag.net/
--
We rode on the winds of the rising storm,
 We ran to the sounds of thunder.
We danced among the lightning bolts,
 and tore the world asunder
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