title: Google Bigtable delete time range
body: <p>We are evaluating Google Bigtable as a hot storage for IoT data. we have a RowKey based on DeviceID + Timestamp
  e.g. 'ABC20201122093211' And the row data stored is a protobuf message.</p>
  <p>We are also moving this data into a cold storage after some days as the amount of data is just gigantic.</p>
  <p>Now, my issue is, what is the proper way to delete the data from Bigtable?</p>
  <p>If I use a TTL, the data may still hang around for a week before compaction of the table.
  Admin Client deletes seems to be able to do it faster, but instead there is no way to delete multiple ranges at once. I would have to sequentially delete the timerange for each device.</p>
  <p>What are my options here?</p>