Hi Mohammed,
your problem was solved ?
In DSO level or Cube level?
In cube level it is possible but DSO level not possible if you delete middle request it will go rollback.
another solution was selection deletion
select DSO -> contents-> deletion -> select deletion-> give there ranges ->then execute.
otherwise select your DSO -> right click -> delete data ( it will delete total data immediately)
hopes it will help.
Thanks,
Phani.