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From "Anthony J. Biacco" <abia...@formatdynamics.com>
Subject RE: [users@httpd] mod_disk_cache and ext3-limits
Date Thu, 12 Mar 2009 15:57:53 GMT
Found my numbers if you're interested. Using ab -n 500 -c 50 from
localhost to a 8K static file. Apache 2.2.11 w/worker MPM.

Module			Requests/s
mod_memcached_cache	145/s
mod_disk_cache		1304/s
mod_mem_cache		2122/s

and for the memcached moduloe I was seeing errors in the apache log.
Can't remember what they were now, but they weren't good, and couldn't
fix them.

-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com

-----Original Message-----
From: Anthony J. Biacco [mailto:abiacco@formatdynamics.com] 
Sent: Thursday, March 12, 2009 8:52 AM
To: users@httpd.apache.org
Subject: RE: [users@httpd] mod_disk_cache and ext3-limits

I tried mod_memcached_cache and wasn't thrilled with performance at all.
I don't have the numbers right in front of me but at high requests and
concurrency it fell apart under my load testing.

-Tony

Sent from my Windows Mobile(r) phone.

-----Original Message-----
From: Brantl M. Klaus <kmb@deam.org>
Sent: Thursday, March 12, 2009 3:17 AM
To: users@httpd.apache.org
Subject: [users@httpd] mod_disk_cache and ext3-limits

Hi there,

I've read about changing the FS to get more file-links/ dirs into one  
directory, but thats a bit of a problem here. So basicly I need to  
stay with ext3.

Trouble is that changing the caching-behaviour with CacheDirLevels and  
CacheDirLength won't change the overall amount of URL's the system can  
cache. It always ends with about 32000 links within the CacheRoot -  
and thats the exact amount of "total entries" the htcacheclean  
delivers in verbose mode.


Because of the structure of the site I'm working on we have tons of  
different URL's with very litte payload. So currently I'm reducing the  
cache to 500m with htcacheclean to stay in the range of abaut 25000  
links. But thats not really what I need...
I'm now thinking of using mod_memcached_cache, but don't know how  
"stable" this can be called. And of course our disks have more space  
left than we have memory to "waste".


Any clue on how to save more that 32000 URL's mit mod_disk_cache and  
ext3?

kind regards
Klaus

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