can i use a raspberry pi web server

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As long as you can setup a webserver on the OS runnig on the device you can setup PHPFusion,
So you better search whether you can install a webserver on an OS compatible with it.

if this is an answer, what does it mean?

b.r.

u can install unix* on it, so u can install lamp.
but too low perfomance will be i think)

speed might be one problem, a single proc. system 700MHz and 500MB RAM
but
i worry more about the SD card wear out /10000 block writes,
while the wheezy-raspbian OS use a small ramdisk for temp files
( because of that problem),
a CMS use only SQL db ( what will be on SD card), even for temp data??
so here the php-fusion related question,
- does every visitor of the site generate a write operation? could this be disabled?
or only if there is a LOGIN?,
or a blog / forum change?

because visits at mere html sites are read only operations,
and no problem for a SD card.

the possible usage might be unusual for a CMS,
- used per room and connected to a TV, so the word "HOME"page now make more sense
- for a house automation ( RPI and arduino )
- for bigger projects ( guesthouses/ hotels/ companies )
lets say one RPI and arduino per floor ...
- for internal LAN or via "noip" to WWW

like a DCS, Distributed Control System with network controllers
using a RPI and a arduino, 21£ each.

workblog http://kll.byethost7.com/kll_en7/news...eadmore=36

Any connection to the PI web server will create a I/O so the SD is not the best option.

in that case apache would be installed wrong by RPI!

or did you mean any connection to php-fusion would generate a WRITE to SD card,
how to disable there?

do you know the exact linux command to check on the WRITES to DISK? i am new to this.

back to the speed question, i got PHP-fusion installed and run via router / 20m ethernet cable
and its very fast!! as i not use internet inbetween.

and in the linux window i see only small peaks on the cpu monitor when i call my php-fusion webpage via ethernet.

so i think for a inhouse job RPI is usable as cms webserver.
( would be nice if i get help with the php-fusion writes question )


but live data from the arduino in php-fusion will need some more work.
esp. if i want a historic database about the readings in a mysql db,
like min, max, avg of one hour ( to limit the SD writes )
and show the charts in php-fusion....

Anything would. Apache writes logs to the server, (SD card) PHPFusion adds things to the database. The database in on the SD card. Use a SSD.

i found following path,
/run/apache2/ ramdisk
/run/lock/apache2/ ramdisk
both are empty anyhow,
pls tell me where to look

It writes things everywhere, Error_logs, access_log system files. everything

so instead of apache you would recommend what for RASPBERRY PI ??

Any server will write information to SD card.

update:
php-fusion on RASPBERRY PI webserver
show ARDUINO measurement data in panel

You can get an external HDD and use it instead of the card? Does the RPI boot from an ext. HDD, that would be great, although the HDD might be more expensive than the RPI.

i am new to this ( booted my RPI 15 days ago ),
but i read that boot from SD card only,
but ext HDD use for system possible, we test soon.

in a project with multiple RPI/ARDUINOs i would like
to use a central webserver with HDD,
what is collecting the arduino measuring data from each RPI (by ??? )
( RPI being then only web clients with SD card)

@Archer: the idea to use SSD instead of SD cards i not understand?
isn't both using NAND flash?
how many block writes are possible with SSD? is the 10000 correct with all SD?

but i remember, this forum is about php-fusion
there is a table xxx_ONLINE what contains the IP of a user calling php-fusion page,
thats the write to db at every call?

Yeah anything you run on it will write things. Apache will write a log every single time a user visits your site, any database driven site will write something every time a user visits the site. SSD's are better than SD cards. Even a USB drive is better.