----- Original Message ----- From: "Mark M. Barrios" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, March 11, 2003 1:06 PM Subject: Re: [plug] squid cache
> so say i have a 10GB partition/HD dedicated for a cache_dir, i should > only set a cache_dir size "way below from the total actual size of that > partition" like set it at say 4GB? it is up to you to set but be sure it is below 10GB and not 10GB > then wouldn't that be a waste of > space? waste of space but you will find the answer below.... > setting the cache_dir to something small doesnt solve the > problem, huh???? it will not solve the disk full problem??? > it would only reach 100% faster, then youd get warnings in > squid's log huh???? and what warning messege would that be??? > a small cache_dir with lots of requests coming in also makes for an > ineffective cache. how sure you are with your claims? do you understand how a filesystem works? i thought you understand this why we allocate cache_dir half of the total capacity of that partition.... web objects are temporarily stays in your disk cache.. these objects are rapidly comes in and comes out in your filesystem... with this, a rapid of file or block allocation and deallocation in your filesystem.... this scenario will lead to disk *fragmentation*... fragmentation is very harmful to filesystem disk i/o performance.... to compensate this problem.. you have to sacrife some *wasted* space in it... that is why i allocated half of the total disk capacity....with this, it will find the *best fit* number of contiguous blocks found always in the wasted space... until the wasted space are in used, the previous space that has been deallocated are assumed to be free contigous blocks again.... therefore, this will lead to an effective caching especially on the disk i/o performance... > we were running the latest stable release at that time and when i set > cache_replacement_policy to something other than the default the cache > size stayed within its limits. GDFS, LFUDA or LRU replacement policy.... squid always stayed within its limits... fooler. _ Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] Fully Searchable Archives With Friendly Web Interface at http://marc.free.net.ph To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED]
