How to generate random numbers between 0 and 1 in bash

Question

I'm trying to infer how to generate two random numbers as input values for parameters of readproportion, updateproportion in a way that sum of these parameters should equal 1, in the following bash command.

$ ./bin/ycsb run basic -P workloads/workloada -p readproportion=0.50 -p updateproportion=0.50

Please help with your suggestions.

Thanks

Answer 1

As far as I can remember ${RANDOM} generates integers in the interval 0 - 32767. So, I guess, you might want to try something like this to generate random values in [0,1]:

bc -l <<< "scale=4 ; ${RANDOM}/32767"