Brahma Resources Page

This is the official home page for the Duke University Physics Department's Brahma Beowulf Project. Please feel free to explore this website. There are a number of things on the site itself that may be of use or interest to individuals interested in beowulf-style cluster computing.

This site is maintained by rgb. It and all works linked thereupon authored by Robert G. Brown are Copyright 2003 (or as indicated in the document) and made available through a modified Open Publication License unless superceded by another license directly associated with the document. (Current site version 2.2-1)

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xmlsysd wulfstat wulflogger wulfweb cpu_rate C++ Rant

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Robert G. Brown
Duke University Physics Department
Durham, NC 27708-0305
Copyright Robert G. Brown, 2014


wulfweb (v 0.0.2, 5/29/04) is a perl script designed to take the output of wulflogger and transform it into an HTML table or a web page that can be displayed on its own or embedded in other web documents. It currently supports only a color coded load average display, but eventually it will support all the wulfstat/wulflogger display types. It is also very easy to customize using e.g. threaded perl should one need a particular mix of displayed fields or should you wish to add graphics.

The web table generated currently contains a meta statement causing the web document to be automatically refreshed after a user definable delay. A future switch will allow the meta tag to be omitted, so that although the web table will be refreshed on a selectable delay loop, the user will have to manually refresh the image in their browser to obtain the latest stats. Note that wulfweb is not a CGI script -- it is an independent polling loop script that rotates new html table images into a named file from which they can be browsed and display without any active component.

wulfweb requires wulflogger to be installed on the host where the wulfweb script runs and additionally requires xmlsysd to be installed on the monitored nodes or LAN workstations.

wulfweb is very much under construction (we're talking alpha here, not beta). There are displays missing and the code may still change its general layout as I add the missing displays and learn (the hard way) where I'm doing thing stupidly. Still, it seems to work pretty well and has now been presenting a statistical overview of our cluster load for three or four days continuously without failure or flaw. I'm trying to make it somewhat portable as I go. Feel free to contribute back any additions or improvements you make if you adopt it and adapt it.

If you need any particular output from wulflogger let me know. Eventually I'll probably come up with an output format descriptor that can be read in as input so you can roll your own format and get precisely what you want, but we're not there yet.


Document TypeSize (K)Last Modified
noarch RPM 15
Source RPM 25
Tar/Gzip (tgz) 23
License Info

Except where explicitly indicated otherwise, the documents linked from this page are all provided under a modified Gnu License appropriate for the document type (OPL for text, GPL for software/source). Please read the relevant license(s) before redistributing the document(s) in any form -- an explicit agreement with the author is required for certain kinds of for-profit redistributions. In all cases the license makes the documents generally available for unlimited personal use and non-profit distributions (for example, linking or posting copies on a website, distributing paper copies to a class for free or at cost).

The author cherishes feedback. If you like or dislike the document(s) and would like to say so, wish to redistribute a version in any medium to be sold at a profit, would like to contribute or comment on material, or just want to say hi, feel free to contact the author

Home Top Beowulf Book Intro 2003 Duke Model Helicity Intro to IP Local IP admin Contact About
xmlsysd wulfstat wulflogger wulfweb cpu_rate C++ Rant

This page is maintained by Robert G. Brown: