speed
 

hi, is there a tip where i can speed the downloading just alittle faster? like, is there a button where i can find other sources. or something that i should change in my option settings?

vintagedork,

Your download speed depends on several things. First your download capability and then that of your host. If you have a high speed connection but are downloading from a modem you will be limited to your hosts upload speed.

Assuming you have high speed capability you can improve your download speed if you can connect to multiple hosts. Often you can help the odds of this by searching on the filename you are downloading or refreshing your original search. Limewire sometimes locates additional hosts when you search again.

Norm

which speed do i choose i have bt broad band ..i got it set at modem at the moment

deeuk

You should go to - TOOLS, OPTIONS, SPEED and select Cable/DSL.

This will tell others what speed your system is running. It will not speed up your downloads. They are limited to the speed of the system(s) you are downloading from or your capability whichever is slowest..

You can limit the speed of the hosts in your search returns by going to TOOLS, OPTIONS, SPEED, and selecting to only return results from high speed hosts but I wouldn't recommend it. You will greatly limit your search results.

Norm

thanks very much

Speeds are set up according to your maximum effective download bandwidth:
- modem/ISDN : 56 to 128 kbit/s
- cable/DSL: 350 to 999 kbit/s
- T1: 1 Mbit/s to 2.9 Mbit/s
- T3: 3 Mbit/s or more
- Ethernet: not limited.

Then the upload speed is setup with a slider as a percentage of this value. The slowest setting is 25%, the fastest is 100%.
So the slowest settings for uploads is:
- modem/ISDN: 24 kbit/s
- cable/DSL: 87 kbit/s
- T1: 256 kbit/s
- T3: 750 kbit/s
- Ethernet: not limited

And the (default) fasted settings for uploads is:
- modem/ISDN : 56 kbit/s
- cable/DSL: 350 kbit/s
- T1: 1 Mbit/s Mbit/s
- T3: 3 Mbit/s
- Ethernet: not limited

On a ADSL (assymetric) connection, you may need to reduce the upload speed to keep your performance. The ideal upload speed to set is at about 85% of your maximum theorical upload speed.

For example with a 1024/128k ADSL access, you would choose:
- download speed: cable/DSL = 350 to 999 kbit/s
- upload speed: limit at 31% = 108.5 kbit/s (85% of 350)
(as the slider goes from 25% to 100%, the position for 31% is around 1/4 of the visible width of the slider)

Generally, for most cable accesses, you will need to reduce the max upload speed as well if your upload bandwidth is shared despite such access is most often symetric: you can't reach the theorical maximum. This depends on your ISP, but a typical cable access at 1.5 Mbit /s should work well with an upload speed limit around 1Mbit/s (so with the limit at 66%, or the slider will be near the middle of the slidebar).

For symetric and dedicated (bandwidth not shared) accesses (SDSL, T1, T3), you can keep this slider at its maximum)

To help visualize this limit, the slider displays the computed max upload speed.

Thanks Philippe--that clarifies the speed options nicely. Through trial and error I'd found setting my upload limit to 80% of 1 mbps worked very well.

Recently some cable companies here in Canada have increased the bandwidth (usually shared) they provide to 5 mbps down and 1 mbps up, in order to stay ahead of the telcos providing DSL. This means over half of the top fastest domain names are Canadian.

So users with these companies should choose "T3 or Better" and limit uploads to ~95KB/sec. Correct?

However, the upload bandwith slider at its minimum is 93.75 KB/s which is a bit high, especially if others on the LAN start using their gnutella clients too.

So, would it be better to set the speed to T1 or T3?

I guess the best situation would be if LW could autodect the upstream load from the home router, and adjust accordingly.

thanks alot

That's what LimeWire will do. If you set the initial speed to high, LimeWire may start with poor performance, but will finally reach a stable setting, because it will monitor the actual total download/upload speed to avoid exceeding the workable maximum.

When any Internet application uses its maximum upstream/downstream bandwidth, it cannot react to changing conditions, because the roudntrip delay is increased a lot with buffering. A ping/pong that normally replies in about 70ms on a idle connection may be only able to reply in 800ms or more. Keeping a small unused bandwidth allows sending urgent messages and keeping the roundrip time at acceptable levels.

If you use 85% of your bandwidth, the roundtrip time will be increased but at a still reasonnable limit of about twice the delay on an idle Internet connection.

You may want to adjust the upload speed and check the TCP/IP average ping time so that it will be approximately the double of your average ping time when no upload is in progress. If your ping causes more than 50% of packet losses, you know that your upload speed is set to high, and the latency of your servent is too high.

Normally you will not need to limit your download speed (most users will want it to be maximized).

The key setting should depend on the available upload speed. If your access offers 1Mb/s upstream, the best setting will be at 850kbit/s (103.75 KBytes/s) for a 85% usage rate, or 800kbit/s (97.66 KByte/s) for a 80% usage rate.

As the lowest setting for T3 is at 25% of 3Mbit/s (750kbit/s), the T3 download setting will work well provided that the upload setting slider not too far above its minimum.

On 1500/128 Verizon DSL. Windows XP PRO, firewall settings entered correctly, compression on, latest Java, etc... I set the upload slider to unlimmited, but my downloaders are only getting 14KB at most. They are on DSL and higher speed connections. What may I do to give them faster downloads? I feel bad because the file is large and it is pathetic to take a week to get the file. Especially since it then increases the chances of getting "file corrupt".

Thank you.

128 kilobits per second, divided by eight, equals 16 kilobytes per second maximum under ideal line conditions (rare).

So, looks like your uploads bandwidth is pretty much where it should be--14KB/s

All you really can do is upgrade your DSL connection or look at cable, which usually offers better upload bandwidth for the same price, if available.

btw--even though others can only get that file at slower speeds, with partial file sharing they may just get the key piece they need to complete the file, and the new code is great at identifying any corrupt portion of the download so the whole file doesn't need to be redownloaded--just the corrupt chunk. Sweet eh? Philippe and others have really helped with this addition ("THEX") to the code.

btw--welcome: glad to see a real sharer posting!

Thank you for your help. I guess I was foolishly thinking that if only one person was downloading they would get most if not all the bandwidth. And it is only 16 no matter if it is one or four, 16 devided by the number of users. Like now, 4 downloads @ 4KB each...

Cheers,

Duh George

Reread my previous message: I said "upstream"
and "upload speed".

DSL accesses are most often asymetric (so the acronym ADSL). SDSL (symetric) is deployed mostly for professional accesses, but still very rare at a competitive price for home users.

Cable users have also an asymetric speed due to the shared physical link.

In Europe, most [b]up[b]stream speeds for ADSL are between 64kbps and 128kbps, even for accesses up to 2Mbps downstream. There are some newer offers to get 256kbps upstream, but SDSL is still not economically competitive for home users.

Remember that the total bandwidth available on a POTS line is the sum of the POTS or ISDN service (4kHz), plus 2 times the bandwidth in bits per second, of the uptream and downstream width.

So for a 1024/128 kbps ADSL link, the total bandwidth used will be (1024+128)*2+4 = 2308 kHz. There's in fact a required gap of at least 4kHz between the POTS and the DSL channels, which are chosen by subchannels of 4kHz each and multiplexed in parallel.
A 1024/128 ADSL link uses 256 channels of 4 kHz, chosen in a set of channels available in a band of about 3Mhz-wide (which offers 768 channels). The number of usable channels in this band depends on the POTS line physical properties: total lengths, quality, attenuation, diaphony, etc...

The DSL technic allows determining automatically which 4 kHz channels are the best to use to offer the connection. Each channel offers 2kBps of raw binary bandwidth, generally used with a ATM framing protocol (which uses small 64-bytes frames with small control headers, and fixed sizes, called "cells", which allow easy resynchronization and quality control). One cell is fully transported on a single channel, so multiple cells can be sent in parallel on distinct channels.

I understand what you said… it’s just a matter of perspective. I download, they upload to me. They download from me, I upload to them. The only point I am stuck at is: The maximum that any one person or group of people can upload from me is 16KB. Is that correct? [1 upload=16KB, 2 uploads=8KB each, 4 uploads=4KB each]

Cheers,

Duh George

And what are the rest of us? ;)