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Grex > Info > #159: Transfer rate of FTP | |
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| Author |
Message |
zlee
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Transfer rate of FTP
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Jul 5 18:23 UTC 1994 |
What is the usual transfer rate of FTP? Everytime I FTP a file, I only
get like .3K/sec or something? I heard of transfer rates of 200M/Sec
elsewhere...
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| 61 responses total. |
kentn
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response 1 of 61:
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Jul 5 18:41 UTC 1994 |
I expect it won't be any faster than the weakest link in the chain
(network) which in this case would probably be whatever portion
of Grex's 28.8 modem you're using at the moment. I've timed ftp
transfers on my 2400 modem and my 14.4 modem using NCSA Telnet & a
PPP dialin connection. They weren't any faster than a Zmodem transfer
over dialin (and often slower). Now, ftp transfers over an ethernet
connection are *fast*...but then that's a faster link...
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rcurl
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response 2 of 61:
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Jul 5 18:50 UTC 1994 |
I get up to about 1300 bps with MacPPP to the NAS and a 14.4 3.2bis
4.2bis modem.
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kentn
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response 3 of 61:
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Jul 5 23:10 UTC 1994 |
I've gotten up to 1600 bps with serial dialin and a 14.4 3.2/4.2 bis
modem and Zmodem. Usually it's around 1200, however. There seems
to be no rhyme or reason to why it's as slow as 120 bps one minute
and 1300 bps the next (during the same file download).
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zlee
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response 4 of 61:
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Jul 6 00:43 UTC 1994 |
Well, actually, when you FTP some file, it copies the file onto Grex's
system, then I can download it to my system... what I meant was the
speed of the NET... After I FTP some file, it says that it is like
.3K per sec... I thinks that's pretty slow for Internet...
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kentn
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response 5 of 61:
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Jul 6 03:01 UTC 1994 |
When you split 28.8 24 (or more) ways...(even with compression)...
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srw
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response 6 of 61:
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Jul 6 03:01 UTC 1994 |
You are assuming that our system is attached to the internet directly
via an ethernet card as is often the case in a university setting.
We are not. We are connected by a phone line to a commercial internet
provider. Lots of traffic is competing with your ftp packets for that
narrow (28.8 no header compression) little pipe, so it will be very slow.
Our link may get enhanced some, but it will likely never attain the
speed of a university site. Grex just isn't a really good place to
exercise ftp, I'm afraid. You may see some improvement by choosing a
time when fewer people are on using the link, too.
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zlee
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response 7 of 61:
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Jul 7 19:03 UTC 1994 |
Oh, I see... I thought Grex was connected directly... not by some
provider...
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mju
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response 8 of 61:
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Jul 7 23:06 UTC 1994 |
These days, there really is no such thing as a "direct" connection
to "the Internet", since there really isn't any monolithic "the Internet"
to connect to. The closest you can get is the ANS T3 backbone,
but even that isn't "the Internet" -- a large number of service
providers are connected to the CIX's backbone rather than ANS's backbone,
for instance.
For us, though, the limiting factor will almost certainly be our
connection to the rest of the net for the forseeable future. Other
sites will almost always have a fast connection than we do.
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zlee
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response 9 of 61:
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Jul 8 01:29 UTC 1994 |
I think that's pretty bad that Grex is slowed down like that... owell..
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rcurl
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response 10 of 61:
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Jul 8 04:02 UTC 1994 |
I wouldn't call it "bad". Grex has never intended to be an "internet
provider". It is a computer conferencing system - to which an internet
link for distant friends to use was added relatively recently.
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mju
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response 11 of 61:
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Jul 8 04:37 UTC 1994 |
If you don't like the speed of Grex's Internet connection, the
most effective thing you can do is give us funding for a faster
link. Right now the thing keeping us from getting a faster
link isn't political or technical, but financial -- we just can't
afford a T1 or T3 speed link (which can cost tens or hundreds of
thousands of dollars a year).
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kentn
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response 12 of 61:
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Jul 8 04:46 UTC 1994 |
I think Grex's internet link has been performing wonderfully.
While a much faster link (is there anything in between our 28.8
and T1/T3 service?) would be even more wonderful, what we have now
is a far cry from a year ago...
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srw
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response 13 of 61:
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Jul 8 05:09 UTC 1994 |
I think it's possible to go with a 56k service using a leased line.
I believe there are local internet service providers offering that
service, but the cost of even that is hundreds of $/month.
It may also be possible to use ISDN to obtain roughly 128kb
service. I have no idea about cost and availability on that,
but I know it comes with a start-up cost for ISDN interface equipment.
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zlee
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response 14 of 61:
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Jul 8 16:24 UTC 1994 |
well, I've been sending my donation in... But I doubt $6 a month is
enough for a really big speed link...
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mju
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response 15 of 61:
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Jul 8 21:43 UTC 1994 |
The common steps are:
* modem-speed dialup links (up to 28.8Kbps)
* 64Kbps leased line
* 128Kbps ISDN
* fractional T1 (64Kbps steps)
* 1.5Mbps T1
* fractional T3 (1.5Mbps steps)
* 45Mbps T3
* Gbps various fiber media (FDDI, ATM over SONET, etc.)
I doubt Grex will ever have anything faster than T1-speed.
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robh
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response 16 of 61:
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Jul 8 21:58 UTC 1994 |
I'd love to say "Don't worry, Grex will never need a T1", but I
know I'd regret it later. >8)
So how much for the leased line? The ISDN?
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zlee
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response 17 of 61:
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Jul 8 23:29 UTC 1994 |
Yeah, how much is one of those leased lines or the ISDN?
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kentn
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response 18 of 61:
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Jul 8 23:33 UTC 1994 |
As someone already mentioned...hundreds or thousands per month
depending...
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mju
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response 19 of 61:
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Jul 9 01:25 UTC 1994 |
A 64Kbps leased line is usually in the $100-$200/month range.
Two ISDN endpoints vary widely, price-wise, but count on
at least $30/month/endpoint. Each of these also has high
capital costs, of course -- to use a leased line you need
a CSU/DSU at each end, and to use an ISDN line you need ISDN
codecs. Codecs are $1000-$2000 each, and CSU/DSU's are up there, too.
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scg
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response 20 of 61:
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Jul 9 02:15 UTC 1994 |
(Anybody want to translate that?)
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kentn
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response 21 of 61:
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Jul 9 02:17 UTC 1994 |
Read :18...
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zlee
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response 22 of 61:
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Jul 9 02:23 UTC 1994 |
Well, $100-$200 is not bad...
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kentn
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response 23 of 61:
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Jul 9 05:09 UTC 1994 |
But more than Grex can afford right now...
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zlee
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response 24 of 61:
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Jul 9 17:28 UTC 1994 |
Well, if we get more people to donate ... maybe we CAN!!!
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