Anonymous_User Absent Member.
Absent Member.
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Best way to optimize reads

Netware 6.5 sp6
Our school has a number of learning disabled students who need their tests
in audio format. We would like to put an MP3 of the test on the server and
have 30 or so students pull it into Windows XP media player at the same
time.
We tried this as a test, but the file skipped and hung on a number of
machines. What would be the best way to try and optimize the reading of a
single MP3 media file by multiple students?
Thanks


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snidelydev Absent Member.
Absent Member.

Re: Best way to optimize reads

Amy;1298415 wrote:
(...)
We tried this as a test, but the file skipped and hung on a number of
machines. What would be the best way to try and optimize the reading of a
single MP3 media file by multiple students?


This might be a network congestion issue, rather than a server issue per se.

The obvious thing to try (well, obvious to me) would be to copy the file to the local machine and then run Media Player on the local copy.

To make sure that the local copy was always up-to-date and matched the server copy, a batch file (*.bat in this case, running on the workstation) could do the copy, invoke the player, and then delete the file (prevents stale copies from hanging around).

If you have Zen, then you could push the file out ... from what I've heard about Zen, but I'm inexperienced in that area.

Good luck!

/dps

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Anonymous_User Absent Member.
Absent Member.

Re: Best way to optimize reads

The problem with copying the file to the local machine is logistics. Our
students use one of 400 school notebooks, they won't always get the same
notebook. Using the file server would be the way to go, if it worked.
It could be congestion, we're running wireless.

"DaveSchneider" <DaveSchneider@no-mx.forums.novell.com> wrote in message
news:DaveSchneider.2za3so@no-mx.forums.novell.com...
>
> Amy;1298415 Wrote:
>> (...)
>> We tried this as a test, but the file skipped and hung on a number of
>> machines. What would be the best way to try and optimize the reading of
>> a
>> single MP3 media file by multiple students?
>>

>
> This might be a network congestion issue, rather than a server issue
> per se.
>
> The obvious thing to try (well, obvious to me) would be to copy the
> file to the local machine and then run Media Player on the local copy.
>
> To make sure that the local copy was always up-to-date and matched the
> server copy, a batch file (*.bat in this case, running on the
> workstation) could do the copy, invoke the player, and then delete the
> file (prevents stale copies from hanging around).
>
> If you have Zen, then you could push the file out ... from what I've
> heard about Zen, but I'm inexperienced in that area.
>
> Good luck!
>
> /dps
>
>
> --
> DaveSchneider
> ------------------------------------------------------------------------
> DaveSchneider's Profile: http://forums.novell.com/member.php?userid=294
> View this thread: http://forums.novell.com/showthread.php?t=282334
>



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snidelydev Absent Member.
Absent Member.

Re: Best way to optimize reads

Amy;1298507 wrote:
The problem with copying the file to the local machine is logistics. Our
students use one of 400 school notebooks, they won't always get the same
notebook. Using the file server would be the way to go, if it worked.
It could be congestion, we're running wireless.


Yes, you'd have to make sure the batch file was on every machine, or do something with login scripts.

I throttle back now to see if any of the other contributors are overtaking me with a tuning suggestion, or more detailed methods.

/dps

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Anonymous_User Absent Member.
Absent Member.

Re: Best way to optimize reads

As Dave suggests, you need to test whether the problem is really read
performance before assuming that and proceeding on that basis. On the
problem machines does the skipping happen if they are the only one
reading the file? What if you have separate copies of the file on the
server for different machines? What is network and server utilization
like, does it correspond with the skipping? So all PCs skip at the same
time?
--
Andrew C Taubman
Novell Support Forums Volunteer SysOp
http://support.novell.com/forums
(Sorry, support is not provided via e-mail)

Opinions expressed above are not
necessarily those of Novell Inc.
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Anonymous_User Absent Member.
Absent Member.

Re: Best way to optimize reads

Sorry I should have been more specific. We tested 30 very small MP3's (each
one only about 10 sec long, each with a verbal reading of one question)
stored on the server. There was only one copy of each MP3. The 30 students
tried dragging all 30 mp3's into Windows media player as a group. The first
20 or so students worked fine, then the other student machines started
showing an X for different files (the file couldn't be read and so was
skipped by media player). Some files were read OK, others were skipped by
media player. Different files for different students. I assumed some of the
files were timing out because of read problems (or maybe wireless
congestion).


"Andrew C Taubman" <ataubman.RemoveThisToMailMe@novell.AndThis.com> wrote in
message news:I1OVi.581$Uq7.167@kovat.provo.novell.com...
> As Dave suggests, you need to test whether the problem is really read
> performance before assuming that and proceeding on that basis. On the
> problem machines does the skipping happen if they are the only one
> reading the file? What if you have separate copies of the file on the
> server for different machines? What is network and server utilization
> like, does it correspond with the skipping? So all PCs skip at the same
> time?
> --
> Andrew C Taubman
> Novell Support Forums Volunteer SysOp
> http://support.novell.com/forums
> (Sorry, support is not provided via e-mail)
>
> Opinions expressed above are not
> necessarily those of Novell Inc.



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Anonymous_User Absent Member.
Absent Member.

Re: Best way to optimize reads

I actually agree with you Dave.

The problem with wireless is that it is shared media.
The more people using it, the more collisions and errors you will get.
Much like old Hubs.
On top of that you just have the total bandwidth limitation which degrades
quite a bit when errors pop up.

I think something where a script is run from the login script that cleaned
up a scratch folder on the C: drive and then copied class files down.
Then when the students ran them later, it would work well.


--
Craig Wilson - MCNE, MCSE, CCNA
Novell Support Forums Volunteer Sysop

Novell does not officially monitor these forums.

Suggestions/Opinions/Statements made by me are solely my own.
These thoughts may not be shared by either Novell or any rational human.

"DaveSchneider" <DaveSchneider@no-mx.forums.novell.com> wrote in message
news:DaveSchneider.2zac4n@no-mx.forums.novell.com...
>
> Amy;1298507 Wrote:
>> The problem with copying the file to the local machine is logistics.
>> Our
>> students use one of 400 school notebooks, they won't always get the
>> same
>> notebook. Using the file server would be the way to go, if it worked.
>> It could be congestion, we're running wireless.
>>

>
> Yes, you'd have to make sure the batch file was on every machine, or do
> something with login scripts.
>
> I throttle back now to see if any of the other contributors are
> overtaking me with a tuning suggestion, or more detailed methods.
>
> /dps
>
>
> --
> DaveSchneider
> ------------------------------------------------------------------------
> DaveSchneider's Profile: http://forums.novell.com/member.php?userid=294
> View this thread: http://forums.novell.com/showthread.php?t=282334
>



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BSchnur Absent Member.
Absent Member.

Re: Best way to optimize reads

If there was any way you could control for wireless versus wired as the
issue in your short test, that might help isolate the constraint.



--
Barry Schnur
Novell Support Connection Volunteer Sysop

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