[opencms-dev] Scalability of OpenCms

[Alexander Kandzior]

Dear Ivan, 

thank you for your analysis. 

Regarding the client performance of the Workplace web interface, we have
already optimized this in the current CVS 5.3.x version. The Folder tree is
not being fully loaded now, but only incrementally (i.e. the subfolders are
loded when you click on a folder). I'm not sure who much work it is to
transfer this back to 5.0.x. 

The locking mechanism has also been speed up greatly, locking a large folder
structure should now be as fast as locking an individual file. 

It would be great if you could mail me the detailed analysis you have
mentioned. 

I am also interested in the customizations you have made regarding the
support of multiple sites.

Best Regards,
Alex.

Alexander Kandzior
Alkacon Software - The OpenCms Experts
http://www.alkacon.com


 
-----Original Message-----
From: opencms-dev-admin at opencms.org [mailto:opencms-dev-admin at opencms.org]
On Behalf Of Ivan Biddles
Sent: Tuesday, May 18, 2004 7:23 AM
To: opencms-dev at opencms.org
Subject: [opencms-dev] Scalability of OpenCms


Hi,
 
If anyone has any questions about the scalability of OpenCms, we have an
installation with over 25,000 directories and the run-time system performs
excellently for hundreds of thousands of pages and a hundred or so different
sites all on one instance.
 
However, this size of installation does have some problems on the authoring
side. The time taken to lock a file, for example, with Netscape is about 30
seconds. With Internet Explorer it is a whopping two and a half minutes.
(All operations that result in the right hand explorer panel being redrawn
all take about the same length of time.- lock, unlock, return from the edit
window, return from the Admin pages, etc.)
 
Having used packet sniffers I find that all the data is returned from the
server in about two seconds. The rest of the time is spent in the browser
running Javascript to render the page with the cpu load at 100%. The
right-hand panel html is all Javascript with the majority of it being one
Javascript function call for each of the 25,000 folders.
 
This is not a complaint posting. Far from it -  I want readers to see just
how big a system OpenCms can support, and to get a little advice.
 
I have customized OpenCms heavily to support hundreds of sites running from
the same OpenCms instance and so it would take an effort on my part to
upgrade from the 5.0 RC1 base that I'm using. However, have there been
advances in the client-side explorer window code that might speed up things?
If so I will certainly take the time to do so. Any other ideas would be
appreciated too.
 
Some more information is that I can't easily separate the system into
multiple authoring instances because of the sharing of pages and page
elements. I tried projects but although a project may only have a few
hundred folders, it still displays the entire tree.
 
If the OpenCms team is interested I have a fairly detailed analysis of what
is going on with this size of system.
 
Best wishes, Ivan


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