Is the only solution a client-side solution like an Active X control that requires the client to use IE on windows? And what if the solution is for the customers of the client, where browser control is not possible? I am not aware of a cross browser solution. Does anyone else know of a cross browser solution? I always work really hard to build solutions that meet a few goals, simple to use, bulletproof, witango only (for web solutions) to limit extra software installed on my servers, minimal server load to minimize my investment in servers and licenses.
Unless I am wrong, Witango cannot provide the solution. Witango must receive the file from the browser/app server. The only solution I see is to create a desktop app for administration when uploading is necessary, to bypass the browser/web server/app server/disk or database method of transport.
So if anyone has any ideas, I would personally love to hear them.
Robert.
On Sunday, March 23, 2003, at 05:50 PM, Phil Wade wrote:
You should be careful uploading large files through any web application
server, especially when they are client server. If you look at the route
that the file takes in memory it is copied quite a few times so the larger
the file the more work that needs to be done. A typical scenario would go
like this.
(This has been generalised)
File submit via form
File read into browsers memory
File sent to web server over network
File read from network buffer and passed to web server memory as postarg
File passed to app server client and wrapped for sending to app server
File sent to app server from client
File unwrapped by app server memory so it can be accessed as @POSTARG
File saved to disk
So as a minimum the file has been shuttled around in memory around 7 times.
Add to this the encoding that may happen if debug/logging is turned on so
that the variable that contains the data is displayed in the debug trace/log
and it may be greater.
Remember that the client runs in the web server's memory space so this can
make the CPU and memory of the web server process appear to race as it is
encapsulating the postarg to be sent to the server..
Now that the client and server are preemtive, they will attempt to take as
much CPU as they have available to them. Both the client and server should
yield to other processes requesting cpu so the machine should not become
unresponsive.
As a rule of thumb, you should try and get the file to the server using the
shortest path possible and should save it to disk asap. Using http is not
the most efficient way of doing this.
Phil
On 24/3/03 12:17 PM, "Garth Penglase" <[EMAIL PROTECTED]> wrote:
It may be a Windows issue not an IIS 5 issue. Any thoughts Phil/Sophie? Garth
Robert
I tried this on a XP box with apache. IT has 640 megs of ram and a
2.0ghz p4 and my cpu usage went up to 100% so its not an issue with IIS.
Mike D
-----Original Message----- From: Robert Garcia [mailto:[EMAIL PROTECTED] Sent: Sunday, March 23, 2003 12:29 PM To: [EMAIL PROTECTED] Subject: Re: Witango-Talk: HTTP Upload
I haven't done enough testing yet, but I don't think this is a Witango
issue, but a IIS 5 issue.
It would really help if someone had a IIS 5 server using http upload that can test this, so I dont have to set that up.
Robert.
On Saturday, March 22, 2003, at 11:16 PM, Garth Penglase wrote:
I'd be very interested as to whether this is purely a Windows/Witango
issue or if it relates to OSX and other platforms. I agree that it is
totally unacceptable that there is anything more than a few percentage
cpu usage, and this will significantly affect performance on my servers when I upgrade to Wi5 in the next week or so, as I have a number of apps that will require this service.
Maybe With has a comment on this one....?? Garth
Thats not the issue. The issue is having a solution for a client that
is not savvy enough to use an ftp client. I already use webdav in
such a way that they could connect with a webfolder from windows, or
directly from OS X. But these are people that can only be expected
to work with a single interface, and click a few buttons. Using HTTP
Upload is very simple and suits that. But HTTP Upload has other problems, and this CPU Usage issue now knocks it completely off my list.
Robert.
On Saturday, March 22, 2003, at 05:10 AM, Michael Dittbrenner wrote:
Robert
Why not just put up a ftp server instead of using http. Ftp protocol
is
a lot faster than http for uploading and puts less strain on the
server.
Windows 2000 comes with a ftpd built in and if your client doesn't
have
a ftp client they can download a trial from like www.globalscape.com
for cuteftp.
Michael Dittbrenner
-----Original Message----- From: Robert Garcia [mailto:[EMAIL PROTECTED] Sent: Saturday, March 22, 2003 6:59 AM To: [EMAIL PROTECTED] Subject: Witango-Talk: HTTP Upload
I normally don't use http upload for many reasons, but I had to do a
quick and dirty solution for a client. They must be able to upload
MP3
files to our servers. The files range from 10-20 megs. Before I put
this into production, I wanted to test the load it would put on my
servers. My app uses witango to accept the file argument, and write
ait
to a file where I want it. I am running Witango 054 and IIS 5 on
windows 2000. During the upload, the server pegs 100% CPU usage,
dllhost.exe and inetinfo.exe being the culprits. Witango only spikes
when the upload is done to write the file.
Since I have only used http upload with very small files in the
past, I
have never noticed this. This is totally unacceptable. If I upload
the
same file to the same IIS Server using IIS WebDav, it doesn't breaksweat, 1-2% CPU Usage. I can't recall every testing this with other
_____________________________________________________________________web servers, does anyone else have any info with apache or Webstar?
It looks like I will have to write a custom desktop app for this
client's admin, which I did not want to do. If anyone knows of any
IIS
5 tweaks that may help, I would appreciate it. My systems are
completely patched once a week.
--
Robert Garcia
President - BigHead Technology
CTO - eventpix.com
2781 N Carlmont Pl
Simi Valley, Ca 93065
ph: 805.522.8577 - cell: 805.501.1390
[EMAIL PROTECTED] - [EMAIL PROTECTED]
http://bighead.net/ - http://eventpix.com/ - http://theradmac.com/
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Robert Garcia President - BigHead Technology CTO - eventpix.com 2781 N Carlmont Pl Simi Valley, Ca 93065 ph: 805.522.8577 - cell: 805.501.1390 [EMAIL PROTECTED] - [EMAIL PROTECTED] http://bighead.net/ - http://eventpix.com/ - http://theradmac.com/
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