Yes, this helps. As you can see, the Windows client attempts to fetch a subrange. This causes the Squid proxy to query its parent, which in turn does a TCP_REFRESH_HIT and downloads the ENTIRE FILE (which is often several megabytes) to the child cache. Massive network congestion results.
--Brett Glass At 10:09 PM 7/15/2004, Lizzy Dizzy wrote: >Does this helps? > > >TCP_MISS/206 2417 GET >http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/IE6.0sp1-KB823353-x86-ENU_5ee60d6c9b9464c7ddf332147ebd16f.exe > - DIRECT/210.184.108.125 application/x-msdownload >TCP_MISS/206 2441 GET >http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/WindowsXP-KB839645-x86-enu_5e25e12b9c6a95d6067ad6b7a85ff8e.exe > - DIRECT/210.184.108.125 application/octet-stream >TCP_MISS/206 2419 GET >http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/IE6.0sp1-KB823353-x86-ENU_5ee60d6c9b9464c7ddf332147ebd16f.exe > - DIRECT/211.39.137.158 application/x-msdownload >TCP_MISS/206 2537 GET >http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/Windows2000-KB835732-x86-ENU_7b7d1dffd9347af2c166bfcecc4782c.EXE > - DIRECT/211.39.137.158 application/x-msdownload >TCP_MISS/206 2417 GET >http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/WindowsXP-KB841873-x86-enu_adc2732501999ebd990a8ec34b5eeb0.exe > - DIRECT/211.39.137.158 application/x-msdownload >TCP_MISS/206 2416 GET >http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/WindowsXP-KB842773-x86-enu_8c1e3eb9fde8821f40c1aa9cc6e3259.exe > - DIRECT/210.184.108.125 application/x-msdownload > > > GET > /msdownload/update/v3-19990518/cabpool/WindowsXP-KB839645-x86-enu_5e25e12b9c6a95d6067ad6b7a > 85ff8e.exe HTTP/1.0..Accept: */*..If-Unmodified-Since: Sat, 03 Jul 2004 16:56:48 > GMT..Accept-En > coding: identity..Range: bytes=3247378-3249377..User-Agent: Microsoft > BITS/6.2..Host: download. > windowsupdate.com..Via: 1.0 cache1.aabb.net.au:80 > (squid/2.5.STABLE4)..X-Forwarded-For: xxx. > 24.255.74..Cache-Control: no-cache, max-age=259200..Connection: keep-alive.... > >T 192.169.41.47:40820 -> 210.184.108.125:80 [AP] > GET > /msdownload/update/v3-19990518/cabpool/WindowsXP-KB841873-x86-enu_adc2732501999ebd990a8ec34 > b5eeb0.exe HTTP/1.0..Accept: */*..If-Unmodified-Since: Thu, 17 Jun 2004 06:19:03 > GMT..Accept-En > coding: identity..Range: bytes=569173-571172..User-Agent: Microsoft BITS/6.2..Host: > download.wi > ndowsupdate.com..Via: 1.0 cache1.aabb.net.au:80 > (squid/2.5.STABLE4)..X-Forwarded-For: xxx.24 > .83.83..Cache-Control: no-cache, max-age=259200..Connection: keep-alive.... > >T 192.169.41.47:40825 -> 210.184.108.125:80 [AP] > GET > /msdownload/update/v3-19990518/cabpool/IE6.0sp1-KB823353-x86-ENU_5ee60d6c9b9464c7ddf332147e > bd16f.exe HTTP/1.0..Accept: */*..If-Unmodified-Since: Sun, 27 Jun 2004 21:36:59 > GMT..Accept-Enc > oding: identity..Range: bytes=1155018-1157017..User-Agent: Microsoft BITS/6.2..Host: > download.w > indowsupdate.com..Via: 1.0 cache1.aabb.net.au:80 > (squid/2.5.STABLE4)..X-Forwarded-For: xxx.2 > 4.234.46..Cache-Control: no-cache, max-age=259200..Connection: keep-alive.... > > >>From: Robert Collins <[EMAIL PROTECTED]> >>To: Brett Glass <[EMAIL PROTECTED]> >>CC: Lizzy Dizzy <[EMAIL PROTECTED]>,Squid Users <[EMAIL PROTECTED]> >>Subject: Re: [squid-users] download.windowsupdate.com >>Date: Fri, 16 Jul 2004 07:13:23 +1000 >> >>On Fri, 2004-07-16 at 03:13, Brett Glass wrote: >>> Squid does NOT handle Windows Update properly. In fact, it multiplies >>> the traffic by a factor of 1000 in some cases! This is a serious bug >>> in Squid that really should be fixed. >> >>Got some details? >> >>Rob >>-- >>GPG key available at: <http://www.robertcollins.net/keys.txt>. >><< signature.asc >> > >_________________________________________________________________ >Keep track of Singapore & Malaysia stock prices. http://www.msn.com.sg/money/
