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rrinc -
Joined: 24 Feb 2006 Posts: 725 Location: Arkansas, USA
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Posted: Tue Jan 08, 2008 3:42 am Post subject: Only about 40mbps through LAN |
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I'm only getting about 40mbps (megabits per second) through my LAN. I discovered this by transferring a large file (Linux ISO) and monitoring the download rate for about a minute. Should'nt it be possible to get more? All my stuff supports 100mbps (I know getting 100mbps isn't guaranteed, but surely something more than 40mbps).
My router:
P3 500Mhz, 192MB RAM, with 2 10/100 3com NICs and running M0n0wall.
All my computers have 10/100 ethernet. I'm using a few 3ft cables and a 100ft cable.
Whats the bottleneck here? Is it the 500Mhz P3?...by router standards I was thinking that its overkill, but I don't know.
What kinds of speeds do you all get? _________________ -Blake | New Server :D
SaveTheInternet
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AbyssUnderground -
Joined: 31 Dec 2004 Posts: 3855
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Posted: Tue Jan 08, 2008 9:13 am Post subject: |
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It depends how you are transferring it. Via Samba (SMB), which is the standard windows transfer protocol you will use over a network, it will be quite slow because it isn't a very efficient transfer method.
FTP however will transfer much much quicker, as its a file transfer protocol, its designed for it.
HTTP might not reach the high speeds of FTP either without using a download manager to open multiple connections.
The other bottleneck could simply be poor hardware. If it was cheap then it may not be able to handle such high speeds. For example its processor may become overloaded before the data connection. _________________ Andy (AbyssUnderground) (previously The Inquisitor)
www.abyssunderground.co.uk |
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aprelium -
Joined: 22 Mar 2002 Posts: 6800
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Posted: Tue Jan 08, 2008 4:50 pm Post subject: Re: Only about 40mbps through LAN |
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rrinc,
Try disabling the firewall software at first. It can sometimes be the cause of slow speeds.
Are you sure your 100 Mbit connection is full duplex? If one of your NIC cards is half-duplex, the others will downgrade to the half-duplex mode too.
The protocol you use may also add its overhead. TCP/IP is the first to do so. If you transfer a packet with 1 KB of payload, you are actually transferring 1 KB + a few extra bytes as the TCP/IP header. On large exchanges, these extra bytes add up and will take 10 to 20% of the available bandwidth. _________________ Support Team
Aprelium - http://www.aprelium.com |
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AbyssUnderground -
Joined: 31 Dec 2004 Posts: 3855
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Posted: Tue Jan 08, 2008 4:52 pm Post subject: Re: Only about 40mbps through LAN |
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aprelium wrote: | Are you sure your 100 Mbit connection is full duplex? If one of your NIC cards is half-duplex, the others will downgrade to the half-duplex mode too.
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I don't think this applies behind a router/switch, only on direct connections. _________________ Andy (AbyssUnderground) (previously The Inquisitor)
www.abyssunderground.co.uk |
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rrinc -
Joined: 24 Feb 2006 Posts: 725 Location: Arkansas, USA
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Posted: Wed Jan 09, 2008 12:02 am Post subject: |
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It wasn't Windows file sharing (I wish, 40mbps would be insane...I get horrible speeds with wfs). I transferred the file through http (using Abyss), it was the only thing running and there was no other significant network traffic.
The NICs are 3com Etherlink XLs in the router and the computers I tested the file transfer between have onboard 10/100/1000. (motherboards: Abit NF-M2 and Gigabyte P35-DS3L) _________________ -Blake | New Server :D
SaveTheInternet
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aprelium -
Joined: 22 Mar 2002 Posts: 6800
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Posted: Wed Jan 09, 2008 9:47 pm Post subject: |
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rrinc,
According to our tests, it will be difficult to saturate a 100 Mbit link with a 500 MHz computer. But the next generation of Abyss Web Server will be able to deliver a faster speed (about 20% to 50% faster, it depends on the hardware and the OS). _________________ Support Team
Aprelium - http://www.aprelium.com |
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rrinc -
Joined: 24 Feb 2006 Posts: 725 Location: Arkansas, USA
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Posted: Thu Jan 10, 2008 12:39 am Post subject: |
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If you think its the router then I might consider switching the router computer over to a 1Ghz AMD Duron if I can get it to work. Do you really think it would make much of a difference? I know RAM isn't the issue, the router reports only using 14% (of 192MB). _________________ -Blake | New Server :D
SaveTheInternet
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olly86 -
Joined: 25 Apr 2003 Posts: 993 Location: Wiltshire, UK
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Posted: Thu Jan 10, 2008 6:03 pm Post subject: |
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You might find that the speed is limited by the rate that the hard drive at either end of the connection was able to read / write the data. _________________ Olly |
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AbyssUnderground -
Joined: 31 Dec 2004 Posts: 3855
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Posted: Thu Jan 10, 2008 6:04 pm Post subject: |
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olly86 wrote: | You might find that the speed is limited by the rate that the hard drive at either end of the connection was able to read / write the data. |
I highly doubt it can only read at 4MB/s (40Mbps). _________________ Andy (AbyssUnderground) (previously The Inquisitor)
www.abyssunderground.co.uk |
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olly86 -
Joined: 25 Apr 2003 Posts: 993 Location: Wiltshire, UK
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Posted: Thu Jan 10, 2008 6:16 pm Post subject: |
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AbyssUnderground wrote: | olly86 wrote: | You might find that the speed is limited by the rate that the hard drive at either end of the connection was able to read / write the data. |
I highly doubt it can only read at 4MB/s (40Mbps). |
One of my drives on it's way out read at those kinds of speeds. _________________ Olly |
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AbyssUnderground -
Joined: 31 Dec 2004 Posts: 3855
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Posted: Thu Jan 10, 2008 6:20 pm Post subject: |
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olly86 wrote: | AbyssUnderground wrote: | olly86 wrote: | You might find that the speed is limited by the rate that the hard drive at either end of the connection was able to read / write the data. |
I highly doubt it can only read at 4MB/s (40Mbps). |
One of my drives on it's way out read at those kinds of speeds. |
How old is the drive? I've never heard of any drive from the last 10 years not being able to cope with such a slow speed. _________________ Andy (AbyssUnderground) (previously The Inquisitor)
www.abyssunderground.co.uk |
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olly86 -
Joined: 25 Apr 2003 Posts: 993 Location: Wiltshire, UK
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Posted: Thu Jan 10, 2008 6:26 pm Post subject: |
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AbyssUnderground wrote: | olly86 wrote: | AbyssUnderground wrote: | olly86 wrote: | You might find that the speed is limited by the rate that the hard drive at either end of the connection was able to read / write the data. |
I highly doubt it can only read at 4MB/s (40Mbps). |
One of my drives on it's way out read at those kinds of speeds. |
How old is the drive? I've never heard of any drive from the last 10 years not being able to cope with such a slow speed. |
About 12 months, the manufacturer agreed to replace it as the drive was defective. _________________ Olly |
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AbyssUnderground -
Joined: 31 Dec 2004 Posts: 3855
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Posted: Thu Jan 10, 2008 6:28 pm Post subject: |
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olly86 wrote: | About 12 months, the manufacturer agreed to replace it as the drive was defective. |
Thats a different story then. We are assuming this drive is OK and is capable of normal speeds of 40MB/s+ (400Mbps+) _________________ Andy (AbyssUnderground) (previously The Inquisitor)
www.abyssunderground.co.uk |
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rrinc -
Joined: 24 Feb 2006 Posts: 725 Location: Arkansas, USA
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Posted: Thu Jan 10, 2008 9:33 pm Post subject: |
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My drives are definitely ok. All are less than a year old and SATAII. I haven't had any problems with any of them. _________________ -Blake | New Server :D
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