On 04/24/07 01:37, Richard Elling wrote:
Leon Koll wrote:
My guess that Yaniv assumes that 8 pools with 62.5 million files each
have significantly less chances to be corrupted/cause the data loss
than 1 pool with 500 million files in it.
Do you agree with this?
I do not agree with this statement. The probability is the same,
regardless of the number of files. By analogy, if I have 100 people
and the risk of heart attack is 0.1%/year/person, then dividing those
people into groups does not change their risk of heart attack.
Is that not because heart attacks in different people are (under normal
circumstances!) independent events. 8 filesystems backed by a single
pool are not independent; 8 filesystems from 8 distinct pools are a lot
more independent.
Gavin
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