def snapshot_filepath(base_dir, service_name, service_id, snapshot_id)
      File.join(base_dir, "snapshots", service_name, service_id[0,2], service_id[2,2], service_id[4,2], service_id, snapshot_id.to_s)
    end
def snapshot_filepath(base_dir, service_name, service_id, snapshot_id)
      File.join(base_dir, "snapshots", service_name, service_id[0,2], service_id[2,2], service_id[4,2], service_id, snapshot_id.to_s)
    end
Get the snapshot file path that service should save the dump file to.
 the snapshot path structure looks like <base_dir>\snapshots\<service-name>\<aa>\<bb>\<cc>\<aabbcc-rest-of-instance-guid>\snapshot_id\<service specific data>