I worked for an ISP which provided wireless services to a local community as well as 3 other remote communities. We had wireless shots ranging from across the street to ~26KM hops to moutain repeater sites using Lucent's wireless hardware (2.4Ghz).... and this was 2 years ago! We used a range of directional parabolic antennas and dishes with a tower we built (that was interesting) for our main repeater site. Lucent reps even came up from Atlanta to have a look at our setup which they remarked wasn't exactly what they had in mind when they first developed their wireless hardware!
The main problem we had back then and it probably still stands was weather & interference. Everything would work well in the spring, summer, and fall, but winter would play havoc with our gear. We quickly learned how to properly weather seal our connections to avoid moisture forming within cable connectors. Another problem is the inherent drawbacks of using 2.4Ghz freqencies in nasty weather such as hard rain or snow. 2.4Ghz RF waves in these conditions do not play nicely. The other main problem we experienced on our mountain repeater sites was simply snow. On our 26K site, we had no direct power hookup and therefore had to construct an array of car batteries and solar panels to power this site. Again this worked fine during the nicer seasons but during winter, there is a lot less sun light and the snow would pile up *very* high, blocking the solar panels. We would then have to drive as far as we could up the mountain and use snowmobiles the rest of the way to be able to fix any problems (not much fun).
Some of these issues may have been avoided by using different (much more expensive) hardware but when you are trying to make a profit it didn't seem justifiable.
So, the biggest beef I have with wireless is the unpredictability compared to conventional cable connections (Coax, CAT5, fibre) for broadband use. As the technology matures - as it's doing - and for use with short distances it's becoming more of a viable alternative.
Does Postfix support Maildir like Exim or Qmail??
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Postfix
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Does Postfix support the Maildir delivery format similar to Exim or Qmail? If so are there sections in this book which outine the configuration etc?
It would be interesting to see some benchmarks between the different opensource MTAs w/ comparison of the available features for each major MTA (ie. Sendmail, Postfix, Exim, Qmail etc).
Ummmm riiiiiggghhtt! This is why Yahoo makes absolutely no money and experiences down time oh so often!
How long did M$ have to rely almost ENTIRELY on *BSD to make Hotmail *go* because their own OS didn't cut the mustard??
Did Doug Miller forget that the largest FTP sites in the world run on FREE software and are breaking records? What about IRC servers handling 38,000+ clients?? "Pushing the Limits of IRC"
Contrary to what Doug might think (or want to think), I see more and more large companies and organizations (both military and civilian) give up the windows operating system in search of greater uptime and versatility.
The truth is that more and more companies both large and small are utilizing FREE operating systems to do great things. I think this really concerns M$ and it should. Cray SuperCluster® Systems
Would you trust NT for something critical as a 911 system!?! Ya, sure, Bluescreen of DEATH gives a whole new meaning.Yet Another Use for Linux
I admit that Linux and other free OS's have work to do in order to make the desktop a FULLY viable solution for games and serious graphics (although I'm typing this in X) but this FUD has to stop.
Perform a search on Slashdot by typing, "give up microsoft" * I DARE YOU *
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The main problem we had back then and it probably still stands was weather & interference. Everything would work well in the spring, summer, and fall, but winter would play havoc with our gear. We quickly learned how to properly weather seal our connections to avoid moisture forming within cable connectors. Another problem is the inherent drawbacks of using 2.4Ghz freqencies in nasty weather such as hard rain or snow. 2.4Ghz RF waves in these conditions do not play nicely. The other main problem we experienced on our mountain repeater sites was simply snow. On our 26K site, we had no direct power hookup and therefore had to construct an array of car batteries and solar panels to power this site. Again this worked fine during the nicer seasons but during winter, there is a lot less sun light and the snow would pile up *very* high, blocking the solar panels. We would then have to drive as far as we could up the mountain and use snowmobiles the rest of the way to be able to fix any problems (not much fun).
Some of these issues may have been avoided by using different (much more expensive) hardware but when you are trying to make a profit it didn't seem justifiable.
So, the biggest beef I have with wireless is the unpredictability compared to conventional cable connections (Coax, CAT5, fibre) for broadband use. As the technology matures - as it's doing - and for use with short distances it's becoming more of a viable alternative.
Just my 0.02.
Umm you mean IBM's JFS - SGI made XFS :)
It would be interesting to see some benchmarks between the different opensource MTAs w/ comparison of the available features for each major MTA (ie. Sendmail, Postfix, Exim, Qmail etc).
How long did M$ have to rely almost ENTIRELY on *BSD to make Hotmail *go* because their own OS didn't cut the mustard??
Did Doug Miller forget that the largest FTP sites in the world run on FREE software and are breaking records? What about IRC servers handling 38,000+ clients?? "Pushing the Limits of IRC"
Contrary to what Doug might think (or want to think), I see more and more large companies and organizations (both military and civilian) give up the windows operating system in search of greater uptime and versatility.
The truth is that more and more companies both large and small are utilizing FREE operating systems to do great things. I think this really concerns M$ and it should. Cray SuperCluster® Systems
Would you trust NT for something critical as a 911 system!?! Ya, sure, Bluescreen of DEATH gives a whole new meaning.Yet Another Use for Linux
I admit that Linux and other free OS's have work to do in order to make the desktop a FULLY viable solution for games and serious graphics (although I'm typing this in X) but this FUD has to stop.
Perform a search on Slashdot by typing, "give up microsoft" * I DARE YOU *