TimeStamp based index creation scope in Opensearch Data streams

OpenSearch
1

Opensearch Version - 2.12

I’m using opensearch API command to create a data stream and ingest data into it.
the index name generated in data stream is with certain format like

.ds-<data_stream_name>-000001

Is there anyway that using API I could create a custom timeStamp based index name in data stream, like log-, log-2024.05.01 ?
or it is that, data stream would always create a index with such naming format

 .ds-<data_stream_name>-000001

I’m using this index template is used for ingesting data to data stream.

PUT _index_template/demo-index-template -d '{
  "index_patterns": ["demo-*"],
  "data_stream": { },
  "priority": 200,
  "template": {
   "settings": {
    "number_of_shards": 2
   }
 }
}'

also tried fluentd-opensearch plugin to ingest data to opensearch data stream using below configuration, the index name in data stream is remain in same format as .ds-<data_stream_name>-000001 in this case irrespective of using logstash_prefix & logstash_dateformat.

    <source>
      @type dummy
      tag dummy.logs
      dummy {"message":"Sample log message"}
      interval 50s
    </source>

    <match dummy.logs>
      @type opensearch_data_stream
      host indexsearch
      port 9200
      logstash_format true
      logstash_prefix bssc-ds
      logstash_dateformat %Y.%m.%d
      include_timestamp true
      data_stream true
      data_stream_name test-ds
    </match>
2

@subha_1 As far as I know, the data stream backing index name pattern is hardcoded and can’t be changed.