Hi,<br> Although my current setup is not based with APs, but is wired with LTSP, I can saturate even our 1 GB switches with just 10 youtube feeds... will there be any video streaming on the XOs? And indeed, Squid does not bother bottlenecking any of that....<br>
<br>David<br><br><div class="gmail_quote">On Fri, Apr 25, 2008 at 3:03 PM, John Watlington <<a href="mailto:wad@laptop.org">wad@laptop.org</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d"><br>
On Apr 25, 2008, at 8:29 AM, Stefan Reitz wrote:<br>
<br>
> Hi Y'all,<br>
><br>
> On Fri, 2008-04-25 at 14:57 +1200, Martin Langhoff wrote:<br>
>><br>
>> On Fri, Apr 25, 2008 at 2:38 PM, John Watlington<br>
>> <<a href="mailto:wad@media.mit.edu">wad@media.mit.edu</a>> wrote:<br>
>> ><br>
>> > Proposed change to the hardware spec:<br>
>> ><br>
>> > From one to four access points may use an simpler switch,<br>
>> > connected to the server over a 100 Mb/s link. From five to seven<br>
>> > access points will need a better switch, which provides a 1 GB/s<br>
>> > link to the server.<br>
>> ><br>
>> > This means that a 1 GB/s interface should be specified for the<br>
>> servers.<br>
><br>
> I feel teleported back to my 3-19-08 mail:<br>
><br>
> [...]<br>
> (I am thinking server clusters - red hat cluster suite is offering<br>
> some nice tools which I never got a chance to use / try - thinking<br>
> 3 servers with fail-over and increased performance for clients<br>
> (like two servers actually doing something...) would be a starting<br>
> point)<br>
> Birmingham is looking at 49 schools with a total 14,000+ students.<br>
> [...]<br>
><br>
>><br>
>> Theoretically, yes... but perhaps this is a bit over the top. For the<br>
>> space we are aiming...<br>
><br>
> please define our aim<br>
<br>
</div>Martin was correct in that the aim of this discussion is rural<br>
schools in<br>
Peru. Birmingham, NYC, and others will require heftier servers.<br>
<br>
I do dispute any claim that 1Gb/s network interfaces are over the top at<br>
this point in time. The cost difference on the manufacturing side is<br>
around $2.<br>
<div class="Ih2E3d"><br>
>> - the XS services will bottleneck well before saturating 1Gb/s<br>
>> traffic<br>
>> - 'upstream' services that the XS is routing will bottleneck well<br>
>> before 1Gb/s<br>
>><br>
>> if we see a 7-AP setup, it will be there to support either a large<br>
>> number of laptops or a location with obstacles that needs many<br>
>> antennaes. In any case, it will support laptops mostly peering w<br>
>> eachother.<br>
><br>
> how about those 14 - 28 AP setups?<br>
><br>
>><br>
>> If we are designing for a "client base" of laptops that we actually<br>
>> expect to saturate 1Gb, then... we need to start recommending a<br>
>> mid-range server cluster, perhaps a SAN, all costing a few megabucks<br>
> --> <a href="http://en.wikipedia.org/wiki/Weasel_words" target="_blank">http://en.wikipedia.org/wiki/Weasel_words</a><br>
>><br>
>> ;-)<br>
>><br>
><br>
> You get pretty decent off-the-shelf hardware for $500 (asus m2n,<br>
> athlon x2 xx , 2GB RAM) + cost of storage space) per server.<br>
> And considering not every deployment is a remote underelectrified<br>
> mountain / desert / ... area, this should not be light heartedly<br>
> dismissed.<br>
><br>
>> cheers,<br>
>><br>
>> m<br>
><br>
> And I agree with Aaron Huslage that the nature of the AP is going<br>
> to be another big hitter. But I really haven't seen the numbers on<br>
> the budget yet. A decent (non-WRT54(...)) AP comes for $300 - 450<br>
> and is still worth considering.<br>
<br>
<br>
</div>Please define decent, and how it differs from "cheap". We have run<br>
into APs that appeared to artificially cap the number of connections<br>
to less than 30 (market segmentation ?), but have also tested $50 APs<br>
which seem to support 50 users fine.<br>
<br>
Yes, centrally managed networks of APs are much better.<br>
Is that the $300-$450 price you quoted, and does that include the<br>
controller ?<br>
<br>
wad<br>
<div><div></div><div class="Wj3C7c"><br>
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</div></div></blockquote></div><br>