Persistence in Redis Time Series

I have conducted an experiment where I run RedisTimeSeries with persistence but after rebooting redis-server, I am not able to get the previous data and getting “ERR TSDB: the key does not exist” error. I see that neither dump.rdb nor appendonly.aof file is not created. Can you please help me understand if I am doing something wrong here?

Following are the steps I performed:

  1. Enable RDB and AOF persistence in redis.conf
  2. Run redis-server
    redis-server --loadmodule RedisTimeSeries/bin/redistimeseries.so ~/redis-6.0.8/redis.conf &
  3. Run redis time series client which adds timeseries data using TS.ADD
  4. Kill redis-server and start it again
  5. Run redis time series client to query timeseries data using TS.RANGE