Operating Principles of a Hostcache

alex96 · #1 (**permalink**) July 11th, 2009

Thank you, that helps! When you say "hub" it's synonymous to servent/peer, I assume.

So it is really that simple: caches remove IPs from the list in the same order they entered. My first impression is that this is beautifully simple, but is it very efficient? Because some peer stay online for years, others maybe just for seconds.

EDIT: I just remembered reading a paper researching the average uptime (online time) of Gnutella peers. If I remember correctly a great majority of the peer were online several days. So the values of "year" vs. "seconds" I mentioned are rare stray offs without much influence.

Regards,
Alex

OldDeath · #2 (**permalink**) July 11th, 2009

Quote:

Originally Posted by alex96

Thank you, that helps! When you say "hub" it's synonymous to servent/peer, I assume.

So it is really that simple: caches remove IPs from the list in the same order they entered. My first impression is that this is beautifully simple, but is it very efficient? Because some peer stay online for years, others maybe just for seconds.

EDIT: I just remembered reading a paper researching the average uptime (online time) of Gnutella peers. If I remember correctly a great majority of the peer were online several days. So the values of "year" vs. "seconds" I mentioned are rare stray offs without much influence.

Regards,
Alex

Hubs (G2) resp. Ultrapeers (gnutella) are the nodes that form part of the overlay network on which the entire network architecture is based on.

As it takes only some seconds-minutes until the lists are refreshed completely, this assures that only nodes that have become Hub/UP within the last seconds are promoted for new nodes searching IPs to connect to.

mfg,
Old