nanog mailing list archives
Re: Important New Requirement for IPv4 Requests
From: Perry Lorier <perry () coders net>
Date: Fri, 24 Apr 2009 19:05:26 +1200
Large data sets? So you are saying that 512-byte packets with no windowing work better? Bill, have you measured this?Time to download a 100mb file over HTTP and a 100mb interface: 20 seconds.Time to download a 100mb file over FTP and a 100mb interface: ~7 minutes.And yes, that was FreeBSD with the old version openssl library that shipped with 6.3.
As someone who copies large network trace files around a bit, 100MB at 100mb, over what I presume is a local (low latency) link is barely a fair test. Many popular web servers choke on serving files >2GB or >4GB in size (Sigh). I'm in New Zealand. It's usually at least 150ms to anywhere, often 300ms, so I feel the pain of small window sizes in popular encryption programs very strongly. Transferring data over high speed research networks means receive windows of at least 2MB, usually more. When popular programs provide their own window of 64kB, things get very slow.
Current thread:
- Re: Important New Requirement for IPv4 Requests, (continued)
- Re: Important New Requirement for IPv4 Requests bmanning (Apr 21)
- Re: Important New Requirement for IPv4 Requests Joe Abley (Apr 22)
- Re: Important New Requirement for IPv4 Requests bmanning (Apr 22)
- Re: Important New Requirement for IPv4 Requests bmanning (Apr 22)
- Re: Important New Requirement for IPv4 Requests Joe Greco (Apr 22)
- Re: Important New Requirement for IPv4 Requests Karl Auer (Apr 22)
- Re: Important New Requirement for IPv4 Requests Joe Abley (Apr 22)
- Re: Important New Requirement for IPv4 Requests Nathan Ward (Apr 22)
- Re: Important New Requirement for IPv4 Requests Jo Rhett (Apr 23)
- Re: Important New Requirement for IPv4 Requests Jo Rhett (Apr 23)
- Re: Important New Requirement for IPv4 Requests Perry Lorier (Apr 24)
- Re: Important New Requirement for IPv4 Requests Kevin Oberman (Apr 24)
- Re: Important New Requirement for IPv4 Requests Randy Bush (Apr 24)
- Re: Important New Requirement for IPv4 Requests Robert E. Seastrom (Apr 30)
- RE: Important New Requirement for IPv4 Requests Justin Horstman (Apr 30)
- Re: Important New Requirement for IPv4 Requests Jon Lewis (Apr 21)
- Re: Important New Requirement for IPv4 Requests Jo Rhett (Apr 21)
- Re: Important New Requirement for IPv4 Requests Matthew Palmer (Apr 21)
- Re: Important New Requirement for IPv4 Requests Jo Rhett (Apr 23)
- Re: Important New Requirement for IPv4 Requests Kevin Oberman (Apr 24)