hum, a check sometimes is nice for small network use... thinking about apc (php) cache, it don´t have a check, but it use only local memory cache maybe network could have this 'feature', just to optimize some codes, not related to cache, but to network protocol/network otimization
2011/3/18 Dustin <dsalli...@gmail.com>: > > On Mar 18, 3:28 pm, Roberto Spadim <robe...@spadim.com.br> wrote: >> for example, if a key of cache is >> key_1 , key_1_1, hey_1_2 , key_1_3, key_1_xxxx >> if we check key_1 and it return not exists, we don´t need to check >> key_1_1,2,3,4 > > Why wouldn't you just do them all at once? That'll be fewer round > trips assuming low miss rates. Why would you want to trade low > latency for inaccuracy? maybe with a noSQL it´s usefull (memcachedb, membase) > >> it´s a feature, some cache problems could get improvement with it. >> i think it´s very good =) >> think about http sessions >> just check if a variable exists in cache (it can be very big) >> if not exists get from session database (invalidade all cache values >> (delete)) >> if exists get all cache values from cache > > How about this: > > Request it. > If it exists, use it. > If it doesn't exist, go back to the DB. > > -- Roberto Spadim Spadim Technology / SPAEmpresarial
