Thanks for your reply. I understand what you told me, but here another idea: If I read ok, with CARP I can define a master PC, so all the traffic go to that machine and if it go down, then reply the other, no? Well, I can make that the master ask always to the second machine and cache all the petitions. Then, I have all the cache duplicate, but if the master go down, the second one will have all the cache. It's that right ? Regards Carlos Manuel 2011/8/16 Henrik Nordström <henrik@xxxxxxxxxxxxxxxxxxx>: > tis 2011-08-16 klockan 16:54 -0400 skrev Carlos Manuel Trepeu Pupo: >> I want to make Common Address Redundancy Protocol or CARP with two >> squid 3.0 STABLE10 that I have, but here I found this question: >> >> If the main Squid with 40 GB of cache shutdown for any reason, then >> the 2nd squid will start up but without any cache. > > Why will the second Squid start up without any cache? > > If you are using CARP then cache is sort of distributed over the > available caches, and the amount of cache you loose is proportional to > the amount of cache space that goes offline. > > However, CARP routing in Squid-3.0 only applies when you have multiple > levels of caches. Still doable with just two servers but you then need > two Squid instances per server. > > * Frontend Squids, doing in-memory cache and CARP routing to Cache > Squids > * Cache Squids, doing disk caching > > When request routing is done 100% CARP then you loose 50% of the cache > should one of the two cache servers go down. > > There is also possible hybrid models where the cache gets more > duplicated among the cache servers, but not sure 3.0 can handle those. > > Regards > Henrik > >
