Is your feature request related to a problem? Please describe.

opensource YCSB has the following two control that is useful for partitioning demos:

• zeropadding: for generating a record sequence compatible with string sort order by 0 padding the record number. Controls the number of 0s to use for padding. (default: 1)
  For example for row 5, with zeropadding=1 you get ‘user5’ key and with zeropading=8 you get ‘user00000005’ key. In order to see its impact, zeropadding needs to be bigger than number of digits in the record number.
• insertorder: should records be inserted in order by key (“ordered”), or in hashed order (“hashed”) (default: hashed)

This capability has been used in demos.

Describe the solution you'd like

add equivalent controls in workload ycsb

Describe alternatives you've considered

N/A

Additional context

N/A