def snapshot_details(service_id, snapshot_id)
      return unless service_id && snapshot_id
      res = client.hget(redis_key(service_id), snapshot_id)
      raise ServiceError.new(ServiceError::NOT_FOUND, "snapshot #{snapshot_id}") unless res
      Yajl::Parser.parse(res)
    end
def snapshot_details(service_id, snapshot_id)
      return unless service_id && snapshot_id
      res = client.hget(redis_key(service_id), snapshot_id)
      raise ServiceError.new(ServiceError::NOT_FOUND, "snapshot #{snapshot_id}") unless res
      Yajl::Parser.parse(res)
    end
Get detail information for a single snapshot