title: elasticsearch : How can i tell _reindex api in to continue indexing docs while source index still receiving new docs?
body: <p>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.</p>
  <p>How can i tell _reindex api to still reindixing while the source index still receiving new documents ?</p>
  <p>Any help woould be really appriciated!</p>
  <p>Thank you</p>