> rangbooming has lead to extreme optimiazations. i'll let skip > comment on it (he's asleep i guess). but i couldn't have much > worse RTT (sydney-seattle), and the traffic seems a lot lower now, > and the latency has improved extraordinarily.
behavior of windows exploder (rer) and network latency really magnify this problem. we cache the walks, assisted by staling and usage tracking. staling >1×rtt will satiate incessant walk requests from cache. it is useful for what we're doing. brucee has an idea on how it could be applied to something like exportfs, for general use. regarding locks or cache expiry notification that others suggested, the proposal in snspaper was to address that, but in the end we all agreed that if you need it, a control file between the fileserver and the importing side would be sufficient.
