> This is a terrible assumption in general (i.e. if filesize % blocksize > is close to uniformly distributed). If you remove one byte and the data > is stored with blocksize B, then you either save zero bytes with > probability 1-1/B or you save B bytes with probability 1/B. The > expected number of bytes saved is B*1/B=1. Since expectation is linear, > if you remove x bytes, the expected number of bytes saved is x (even if > there is more than one byte removed per file).
You didn't calculate the probability of actually saving a full block or not (that's the only thing that matters). I assumed it's relatively small and can be ignored in practice since the amount of end white space is negligible compared to total file size. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
