Re: [squid-users] Re-distributing the cache between multiple servers
Henrik/Amos, Thanks for the replies. You're 100% correct in suggesting that we are using proxy-only. Thinking a little bit more now about the resilience we want to put in place and the impact of one of the cache servers going down I can see that running without proxy-only could be a great benefit to us. Thanks again for your help. James 2008/10/17 Amos Jeffries <[EMAIL PROTECTED]>: >> Hi, >> >> I have two reverse proxy servers using each other as neighbours. The >> proxy servers are load balanced (using a "least connections" >> algorithm) by a Netscaler upstream of them. >> >> A small amount of URLs account for around 50% or so of the requests. >> >> At the moment there's some imbalance in the hit rates on the two >> caches because I brought up server A before server B and it's holding >> the majority of the objects which make that 50% of request traffic. >> >> I can see that clearing/expiring both caches should result in an equal >> hit rate between the two servers. >> >> Is this the only way of achieving this? I'm concerned now that if I >> was to add a third server "C" into the cache pool it'd have an even >> lower hit rate than on A or B. >> >> I spent some time searching but wasn't able to find "Squid >> administration for dummies" ;) >> > > Sounds like one of the expected side effects of sibling 'proxy-only' > setting. If squid were allowed to cache data received from their siblings > in one of these setups, the hits would balance out naturally. > > Amos > >
Re: [squid-users] Re-distributing the cache between multiple servers
> Hi, > > I have two reverse proxy servers using each other as neighbours. The > proxy servers are load balanced (using a "least connections" > algorithm) by a Netscaler upstream of them. > > A small amount of URLs account for around 50% or so of the requests. > > At the moment there's some imbalance in the hit rates on the two > caches because I brought up server A before server B and it's holding > the majority of the objects which make that 50% of request traffic. > > I can see that clearing/expiring both caches should result in an equal > hit rate between the two servers. > > Is this the only way of achieving this? I'm concerned now that if I > was to add a third server "C" into the cache pool it'd have an even > lower hit rate than on A or B. > > I spent some time searching but wasn't able to find "Squid > administration for dummies" ;) > Sounds like one of the expected side effects of sibling 'proxy-only' setting. If squid were allowed to cache data received from their siblings in one of these setups, the hits would balance out naturally. Amos
Re: [squid-users] Re-distributing the cache between multiple servers
On tor, 2008-10-16 at 14:39 +0100, James Cohen wrote: > I have two reverse proxy servers using each other as neighbours. The > proxy servers are load balanced (using a "least connections" > algorithm) by a Netscaler upstream of them. Ok. > A small amount of URLs account for around 50% or so of the requests. Ok. > At the moment there's some imbalance in the hit rates on the two > caches because I brought up server A before server B and it's holding > the majority of the objects which make that 50% of request traffic. This should even out very quickly, unless you are using proxy-only in the peering relation.. If you are using proxy-only then it will take longer time as it then takes much longer for the active content to get replicated on the servers. Regards Henrik signature.asc Description: This is a digitally signed message part
[squid-users] Re-distributing the cache between multiple servers
Hi, I have two reverse proxy servers using each other as neighbours. The proxy servers are load balanced (using a "least connections" algorithm) by a Netscaler upstream of them. A small amount of URLs account for around 50% or so of the requests. At the moment there's some imbalance in the hit rates on the two caches because I brought up server A before server B and it's holding the majority of the objects which make that 50% of request traffic. I can see that clearing/expiring both caches should result in an equal hit rate between the two servers. Is this the only way of achieving this? I'm concerned now that if I was to add a third server "C" into the cache pool it'd have an even lower hit rate than on A or B. I spent some time searching but wasn't able to find "Squid administration for dummies" ;) Thanks, James
