Lluís Batlle wrote:
2006/2/6, Russ Cox <[EMAIL PROTECTED]>:
Hi... I've been reading the papers about Venti. There is an
explanation about the low probability of the repetition of a hash
string in a normal-sized nowadays hard disk. Anyway I've don't
understood what does Venti do when a hash is found in the stored
blocks, and the contents of the blocks are different (the
low-probability case). I imagine there is some code which does not
give a data-loss... Can someone give a small explanation about that?
It responds to the write RPC with an error.
So what should manage that error? The application? Maybe it try a
different write size?
In fact there should be another application layer between 9p and the
RPC for venti, isn't it? (which?)
Isn't the probability of such hash collisions "pretty" low ?
(lower than the probability of hardware errors passing through
undetected )
