thanks for your comments.
I think I can't do anything, I'm at the top of my performance.
Copying a big file from a server A to a laptop B using another computer C
use 100% of the bandwith of the computer C (50% read 50% write).
but I just realized that in full duplex mode I could use more then "100%"(?)
if I can read & write at the same time...
"Matt Gibson" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> That's what I was thinking, but I was wondering what would happen if hosts
> 1-5 were all sending traffic to host 6...but I guess you're right, the
> buffers would just fill.
>
> Matt Gibson - GSEC
>
> "Paul Hadfield" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Bit of a side line, but, if you have a number of devices connected to a
>> single ethernet switch, with each device using full duplex, then it isn't
>> possible to get an ethernet 'collision', as packets would be
>> queued/buffered by the switch. If ports become very busy, then
>> buffers/queues will fill, but still there should be no collision.
>>
>> Or have I missed something??
>>
>> Paul
>>
>> "Zer0byte" <(E-Mail Removed)> wrote in message
>> news:54DE646A-01FC-4236-963D-(E-Mail Removed)...
>>> You need more traffic to check such factors on the new switch, more PCs
>>> to
>>> check the collusions. if more PCs dont cause collusions, then the 75% is
>>> very
>>> good.
>>>
>>> "Jéjé" wrote:
>>>
>>>> New point...
>>>>
>>>> I have connected a new computer through my switch, its a DS5 (Dlink)
>>>> and
>>>> copied 1 big file from 2 desktops. This switch is conected to another
>>>> one.
>>>> my PC1 is connected to switch A the PC2 to switch B
>>>>
>>>> The usage is 82-85% but there is a lot of collisions in my switch A.
>>>>
>>>> I change it to a DSS8+ model, there is no collisions, but the usage is
>>>> 75%!!!
>>>>
>>>> any idea?
>>>>
>>>> "Zer0byte" <(E-Mail Removed)> wrote in message
>>>> news:025BFA7A-5CF5-444E-A55D-(E-Mail Removed)...
>>>> > very good for a laptop, in addition, being for demo use make you more
>>>> > trust
>>>> > that no important data will be lost.
>>>> >
>>>> > "Jéjé" wrote:
>>>> >
>>>> >> thanks.
>>>> >>
>>>> >> I know that 100% of usage is not possible,
>>>> >> but from your knowledge, does 65% is good?
>>>> >>
>>>> >> Well, I have omit to say that its not "real" servers. Its laptop
>>>> >> computers
>>>> >> configured for demo purpose.
>>>> >>
>>>> >> Between 2 real servers the usage is 82% to 85%
>>>> >>
>>>> >> I'll setup a gigabit switch for my servers and keep my 100mbps
>>>> >> switches
>>>> >> for
>>>> >> my desktops connections.
>>>> >>
>>>> >>
>>>> >>
>>>> >> "Zer0byte" <(E-Mail Removed)> wrote in message
>>>> >> news:C103862B-7131-4ED4-B3F6-(E-Mail Removed)...
>>>> >> > Thats right, but in general, you have also to notice the functions
>>>> >> > of
>>>> >> > those
>>>> >> > servers, and when that bandwidth reaches a certien value.
>>>> >> >
>>>> >> > in other words, you have to check for services that are running on
>>>> >> > those
>>>> >> > servers, for example, if this server runs IIS 6.0, its bandwidth
>>>> >> > will
>>>> >> > differs
>>>> >> > from a server that doesnt run IIS at all.
>>>> >> >
>>>> >> > But anyways, as said before, dont worry about that bandwidth and
>>>> >> > nobody
>>>> >> > can
>>>> >> > reach the ideal bandwith.
>>>> >> >
>>>> >> > "Matt Gibson" wrote:
>>>> >> >
>>>> >> >> You'll rarely ever get 100% efficiency, due to many different
>>>> >> >> things.
>>>> >> >>
>>>> >> >> In other words, don't worry about it, and if you really need more
>>>> >> >> speed,
>>>> >> >> and
>>>> >> >> your servers can pump the info out fast enough, move to gigabit
>>>> >> >> ethernet
>>>> >> >> with jumbo frames and NICs that do TCP offloading.
>>>> >> >>
>>>> >> >> Matt Gibson - GSEC
>>>> >> >>
>>>> >> >>
>>>> >> >> "Jéjé" <(E-Mail Removed)> wrote in message
>>>> >> >> news:%23uSq$(E-Mail Removed)...
>>>> >> >> > Hi,
>>>> >> >> >
>>>> >> >> > When I copy big files from 1 server to another, the maximum
>>>> >> >> > speed
>>>> >> >> > reached
>>>> >> >> > is 65% of my 100mbps network.
>>>> >> >> >
>>>> >> >> > I am in full duplex 100mbps mode.
>>>> >> >> >
>>>> >> >> > can I improove this?
>>>> >> >> > how to identify why I lose 35%?
>>>> >> >> >
>>>> >> >> > thanks.
>>>> >> >> >
>>>> >> >> > Jerome.
>>>> >> >> >
>>>> >> >> >
>>>> >> >>
>>>> >> >>
>>>> >> >>
>>>> >>
>>>> >>
>>>> >>
>>>>
>>>>
>>>>
>>
>>
>
>
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