On Thu, Dec 18, 2008 at 6:56 PM, PAPADIMITRIOU Dimitri <[email protected]> wrote: > Section 3.4: Acquisition Techniques > - Push: e.g. BGP > - Pull: e.g. DNS > - Hybrid Push-Pull
Hi Dimitri, BGP is not a cache acquisition technique. BGP is a database distribution mechanism. The very essence of a cache is that it contains only a small working set carved from the full database. Caches can pull from local databases and remote databases. They can pull from central and distributed databases. But without fail, they are populated when requests for data pull it in from the larger database. To the extent information is pushed to a cache, it generally falls into two categories: extra information included in response to a pull and speculative information that an external system has some reason to believe the cache will need. The "additional" section of a DNS response is an example of extra information. Gratuitous ARP is an example of a speculative push. Regards, Bill Herrin -- William D. Herrin ................ [email protected] [email protected] 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004 _______________________________________________ GROW mailing list [email protected] https://www.ietf.org/mailman/listinfo/grow
