Re: Jaws slows down network transfers, a lot!

  • From: "Marlon Brandão de Sousa" <splyt.lists@xxxxxxxxx>
  • To: programmingblind@xxxxxxxxxxxxx
  • Date: Wed, 17 Sep 2008 13:25:06 -0300

Well ... may be it's not related, but my firewall registers network
activities when JAWS 9 or 10 starts. This isn't what is happening with
previous versions of the screen reader. Using sigate personal
firewall.
Marlon

2008/9/17, Sina Bahram <sbahram@xxxxxxxxx>:
> Hi all,
>
> I've tested this with jaws 9 and jaws 10 beta.
>
> I'm on a gigabit connection with a very decent fast receiver on the other
> side of my gigabit link. 1.8 terabytes of raid 5 15,000 rpm sass drives, so
> on and so forth.
>
> I want to transfer, let's say 50 gigabytes, from my laptop to the external
> machine. I'm just using straight up samba for this, not the best protocol I
> know, but it illustrates the point beautifully.
>
> The specs on my machine are 7200 RPM 2.5 inch 250 gigabyte drive in a dell
> e6400 laptop running the latest 2.8ghz core 2 duo processor and four gigs of
> ram, etc, etc.
>
> I'm trying to establish that hardware, is not the issue here, *smile*.
>
>
> So I fire up the transfer, and it starts up at around 25 megabytes per
> second. A rather pathetic speed, given the gigabit link, since it's only
> using 20% of the wire, but it's acceptable, for now. I allow the transfer to
> continue, of course, and it inches downwards, 24, 23, 20, 18, 15, 13 ... It
> goes all the way down to around 7 mb/s ... At this point I'm not even at
> more than 60% of a 100 mb/s connection, so much for gigabit.
>
> I think to myself, there has got to be something wrong with the network, or
> hard drives, or something ... This is utterly unacceptable. So I stop jaws,
> and have a friend read the transfer speeds.
>
> I not only climb back up, 15, 18, 20, 24, 25, but it keeps going, 28, 30,
> 35, 40, 45, 50 mb/s. I'm now at 400 megabits per second or 50 megabytes per
> second over the network. This is now what I'm more used to seeing.
>
> I fire jaws back up, ... 50, 40, 38, 35, 32, 28, and so on, all the way back
> down.
>
> What on Earth is going on?
>
> The most I can think of is some interrupt being delayed or some event
> blocking on something stupid jaws must be doing ... But wow.
>
> Any ideas? It sucks to have to turn jaws off every time I want to do a file
> transfer.
>
> If folks think this is appropriate, feel free to forward to the jaws scripts
> list or any other list.
>
> In case my email gets lost in forwards, contact me at:
>
> sbahram@xxxxxxxxx
>
> Take care,
> Sina
>
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>


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