elasticsearch : How can i tell _reindex api in to continue indexing docs while source index still receiving new docs?

I have daily created indices, these indices are filled by an agent which collects a logs every second of the day, and i'am reindexing them (by field) to new indices using _reindex api.

How can i tell _reindex api to still reindixing while the source index still receiving new documents ?

Any help woould be really appriciated!

Thank you

you cannot force reindex API to be online to reindex new received documents.

but I have solution. you can add a date field (index_time) to your source index. write an hourly cron job to run reindex API with a query to get last hour indexed docs via index_time.

POST _reindex
{
  "source": {
    "index": "my-index-000001",
     "query": {
        "filter" :{
            "query": {
                "range": {
                   "index_time": {"gte" : "now-1h"}
                          }
                      }
                   } 
               }
  },
  "dest": {
    "index": "my-new-index-000001"
  }
}