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From "Boyle Owen" <Owen.Bo...@swx.com>
Subject RE: [users@httpd] NFS Logging
Date Wed, 21 Sep 2005 07:03:00 GMT
> -----Original Message-----
> From: Dean Maunder [mailto:deanm@skynetmobile.com]
> Sent: Mittwoch, 21. September 2005 00:08
> To: users@httpd.apache.org
> Subject: [users@httpd] NFS Logging
> 
> 
> Hi,
> I have 3 load balanced Apache webserver and I am considering using an
> NFS on another server to write the log files to, 

<sharp intake of breath>
	I wouldn't do that if I were you...

	Writing to logfiles is a very early part of the request-handling and processes will wait
for the logging call to return before proceeding. So for performance, it is vital that log-writing
is fast and reliable. Those are not the first two adjectives I would choose to describe NFS.

You risk random and unreproduceable delays in serving requests due to netwrok latency and,
if NFS goes down, so does your server. The best place to put a logfile is on a hard disk plugged
into the motherboard on the server. You can then mirror or rotatelog it off to NFS asynchronously....

Rgds,
Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored. 

> can anyone offer
> suggestions and/or problem associated with this.
> Currently I am logging to the local disk, then using ssh to copy the
> logfiles off each server for nightly analysis and this is starting to
> become cumbersome.  Also, what are the caveats of using an 
> NFS to serve
> the content, considering that 90% of my content is dynamic PHP?
> Thanks
> Dean.
> 
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