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From Niklas Edmundsson <>
Subject Re: mod_cache responsibilities vs mod_xxx_cache provider responsibilities
Date Wed, 20 Sep 2006 14:22:50 GMT
On Wed, 20 Sep 2006, Brian Akins wrote:

> Niklas Edmundsson wrote:
> don't care about performance...
>> Actually, cache on xfs mounted with atime doesn't seem to be a performance 
>> killer oddly enough... Our frontends had no problems surviving 1k 
>> requests/s during the latest mozilla-update-barrage.
> 1k requests/second is not really that much...  10k requests/second is more 
> what I'm used to.  XFS sucks for us as a cache storage.  It tends to crock 
> under some traffic patterns (reads vs writes).  ext3 is actually more 
> reliable for us.  Reiserfs is interesting, but tends to go haywire from time 
> to time.

I think the key difference here is our average file size... We don't 
need that many requests/s to bottom out gige normally.

> We clean our cache often because we have a really quick way to find the size 
> and remove the oldest expired objects first.  Every cache store gets recorded 
> in SQLite with info about the object (size, mtime, expire time, url, key, 
> etc.).  Makes it trivial tow write cron jobs to do cache management.


  Niklas Edmundsson, Admin @ {acc,hpc2n}      |
  Don't force it, use a bigger hammer

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