mysql cluster partition

[牛兆捷]

I know the default partition of mysql cluster is by primary key,but where
can I know the detail of the partition procedure?

Fox example I have 8 data node ,I set the number of partition number as 8
too,so will it partitions the whole data to 8 parts
and distributing them on 8 node uniformly？

If I don't set the partitions number explicitly,what is the default number
of the partitions number?

Thanks