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On Tuesday 19 August 2008, gentoo_steve@×××××××.uk wrote: |
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> Norberto Bensa wrote: |
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> > Let's make an experiment: |
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> > |
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> > 1. Terminate all downloads and activity on the internet. |
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> > 2. Restart your bind (so it flushes its cache) |
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> > 3. in XP1 download something huge (an ISO image) from one souce in the |
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> > internet and wait 'til it is at full speed (does it go up to 0.5Mb??) |
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> > 4. in XP2 start to ping different sources. Does XP2 lost packets? |
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> |
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> If I do my downloading from XP (using Linux as my nameserver) everything |
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> works perfectly. My downloads max-out my ADSL connection - and not only |
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> can I ping other hosts concurrently, but I can surf the web and |
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> bandwidth is shared fairly between competing applications. |
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I think that the problem is associated with the way that the Linux box treats |
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bind requests. Other than QoS which will try to allocate some bandwidth to |
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bind packets, or nice which will elevate bind's processes - you may want to |
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check your kernel's IO scheduler and set it to something that will give each |
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process an equal bite of the cherry. Trial & error may get you there. |
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A workaround to avoid WinXP name requests timing out is to manually set at |
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your WinXP clients the Netgear's IP address as their secondary DNS server. |
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> My router is a "Netgear Wireless ADSL Firewall Router" - it seems pretty |
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> common... and I've not found other people moaning that it has |
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> problems... For me, it only has problems when accessed from my Linux box. |
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I used to run a Netgear DG834 and did not notice anything like this. After a |
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few seconds the Gentoo and WinXP clients would share the bandwidth - |
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irrespective of which one started downloading first. WinXP might have been |
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slightly more hesitant to start with, but after say 30 seconds it would even |
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out. However, this was with wired full duplex connections. Wireless is half |
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duplex, transmit and receive happens sequentially not in parallel - when |
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downloading on the Gentoo goes at full pelt it may take longer for inbound |
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packets to get to bind and this could make the rather short TTL that |
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MSWindows has to time out. |
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PS. Have you tried this with two Linux clients (use Knoppix on one of your |
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MSWindows boxen)? |
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HTH. |
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-- |
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Regards, |
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Mick |
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