Re: how come lots of small files transfer slower than 1 big one?
From: James (See.My.Sig_at_The.Bottom.com)
Date: 02/03/04
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Date: Tue, 3 Feb 2004 10:35:46 -0800
both computers are pretty new i think they should be able to support
transfering files just fine with their hardware. im guessing either a NIC
settting is the case here or a bad NIC. this NIC im using is the onboard one
that came with this msi 865PE neo-2 ls motherboard. any nic hardware
settings u can think of that would cause this?
"Bob Willard" <BobwBSGS@TrashThis.comcast.net> wrote in message
news:uO%238h3d6DHA.1936@TK2MSFTNGP12.phx.gbl...
> James wrote:
> > what things could be differn't. both are clean installs of xp sp1
> >
> >
> > "Bob Willard" <BobwBSGS@TrashThis.comcast.net> wrote in message
> > news:uEr$Udc6DHA.2044@TK2MSFTNGP10.phx.gbl...
> >
> >>James wrote:
> >>
> >>
> >>>but lots of files tranfer fast when i use another workstation to the
> >
> > same
> >
> >>>server.
> >>>
> >>>
> >>>
> >>>"Bob Willard" <BobwBSGS@TrashThis.comcast.net> wrote in message
> >>>news:OY0pCNB6DHA.2064@TK2MSFTNGP11.phx.gbl...
> >>>
> >>>
> >>>>James wrote:
> >>>>
> >>>>
> >>>>>how come my transfers are so slow when copying files from my xp
machine
> >>>
> >>>to
> >>>
> >>>
> >>>>>my win2k machine on my 100mbps switched lan?
> >>>>>large file = 100MB .mdb
> >>>>>small files = total 7MB's of 400 text files
> >>>>>
> >>>>>it takes 12 mins to transfer the 7 MB's and only 30 seconds to
transfer
> >>>
> >>>the
> >>>
> >>>
> >>>>>large file.
> >>>>>
> >>>>>
> >>>>
> >>>>And how come digging a ditch with one backhoe is faster than using
> >>>>ten men with shovels? Or using a thousand men with teaspoons?
> >>>>
> >>>>Files are transferred one at a time. For each file, the source PC
must
> >>>>look up the file's metadata (to translate the file name to the file
> >>>>location, check security params, etc.). Worse still, is what the
target
> >>>>PC must do for each file: it must find some unused space on the HD,
then
> >>>>allocate some of that space, then create the metadata for the new
file,
> >>>>then ask the source PC for the data, then copy the data to the
allocated
> >>>>space, then update the metadata (when all data has been copied), then
> >>>>notify the source PC that the copy is done.
> >>>>
> >>>>It takes a lot of work to copy a file across a net, whether the file
is
> >>>>tiny or huge. For a huge file, copying data take most of the time;
for
> >
> > a
> >
> >>>>tiny file, copying data takes far less time than all of the other
> >
> > overhead
> >
> >>>>work.
> >>>>--
> >>>>Cheers, Bob
> >>>>
> >>>
> >>>
> >>>
> >> From your question, I assumed that you were interested in why bunches
> >>of files take longer than a single file to transfer; that is the issue
> >>I addressed. If you want to understand why one PC is faster than
another,
> >>then you should conduct some measurements in which only one variable at
> >>a time is changed -- and "the workstation" is not one variable, it is
> >>probably many.
> >>--
> >>Cheers, Bob
> >>
> >
> >
> >
>
> NIC speed, RWIN, protocols used, DNS settings, HD speed, CPU frequency,
> IDE speed, RAM speed and quantity, pagefile min/max params and HD(s),
> XP PRO v. HE, NTFS v. FAT32, user credentials, other traffic on the LAN,
> HD RPM, HD fragmentation, CPU type, cache params, MB type/revision, BIOS
> type, version, and settings, NIC vendor/model, NIC card v. chip,
concurrent
> apps running, domain v. workgroup, etc.
>
> And, maybe, lots of other stuff. It takes care and effort to compare two
> things that are *exactly* alike except for one variable.
> --
> Cheers, Bob
>
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