nanog mailing list archives
Re: TCP and WAN issue
From: Philip Lavine <source_route () yahoo com>
Date: Tue, 27 Mar 2007 14:41:13 -0700 (PDT)
This is the exact issue. I can only get between 5-7 Mbps. So the question is really what incremental performance gain do WAN accelerators/optimizers offer? Can registry/OS tweaks really make a significant difference because so far with all the "speed enhancements" I have deployed to the registry based on the some of the aforementioned sites I have seen no improvement. I guess I am looking for a product that as a wrapper can multiplex a single socket connection. Philip ----- Original Message ---- From: Robert Boyle <robert () tellurian com> To: Philip Lavine <source_route () yahoo com>; nanog <nanog () merit edu> Sent: Tuesday, March 27, 2007 2:04:20 PM Subject: Re: TCP and WAN issue At 04:26 PM 3/27/2007, Philip Lavine wrote:
I have an east coast and west coast data center connected with a DS3. I am running into issues with streaming data via TCP and was wondering besides hardware acceleration, is there any options at increasing throughput and maximizing the bandwidth? How can I overcome the TCP stack limitations inherent in Windows (registry tweaks seem to not functions too well)?
You will have problems obtaining anything more than 5-7Mbit/s based on 1500 byte Ethernet packets and a RTT latency of 70-90ms. You can increase your window size or use Jumbo Ethernet frames. Almost all GigE gear supports jumbo frames. I'm not sure of your application, but without OS tweaks, each stream is limited to 5-7Mbit/s. You can open multiple streams between the same two hosts or you can use multiple hosts to transfer your data. You can utilize the entire DS3, but not without OS TCP stack tweaks or a move to jumbo frames. You can also use UDP or another connectionless packet method to move the data between sites. Good luck. -Robert Tellurian Networks - Global Hosting Solutions Since 1995 http://www.tellurian.com | 888-TELLURIAN | 973-300-9211 "Well done is better than well said." - Benjamin Franklin ____________________________________________________________________________________ Finding fabulous fares is fun. Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains. http://farechase.yahoo.com/promo-generic-14795097
Current thread:
- Re: Jumbo frames, (continued)
- Re: Jumbo frames Stephen Sprunk (Mar 30)
- RE: Jumbo frames Hank Nussbacher (Mar 27)
- Re: Perry Lorier (Mar 27)
- Re: TCP and WAN issue Mikael Abrahamsson (Mar 27)
- RE: TCP and WAN issue Lincoln Dale (Mar 27)
- Re: TCP and WAN issue Steve Meuse (Mar 27)
- Re: TCP and WAN issue Marshall Eubanks (Mar 27)
- Re: TCP and WAN issue Andre Oppermann (Mar 28)
- Re: TCP and WAN issue Marshall Eubanks (Mar 28)
- Re: TCP and WAN issue Simon Leinen (Mar 28)
- Re: TCP and WAN issue Andre Oppermann (Mar 28)
- Re: TCP and WAN issue Philip Lavine (Mar 27)
- Re: TCP and WAN issue Roland Dobbins (Mar 27)
- RE: TCP and WAN issue michael.dillon (Mar 27)
- Re: TCP and WAN issue Roland Dobbins (Mar 27)
- Re: TCP and WAN issue Roland Dobbins (Mar 27)
- Re: TCP and WAN issue Adrian Chadd (Mar 27)
- Re: TCP and WAN issue Leo Bicknell (Mar 27)
- Re: TCP and WAN issue Eric A. Hall (Mar 27)
- Re: TCP and WAN issue Philip Lavine (Mar 27)
- Re: TCP and WAN issue Joe Maimon (Mar 27)
- Re: TCP and WAN issue Robert Boyle (Mar 28)