a. Takes a snapshot of results
b. statefull
c. use scroll-ID & TTL of scroll.
d. Best practice is to delete the scroll and not wait for TTL expire (Holding a snapshot is resource costly)
a. https://www.elastic.co/guide/en/elasticsearch/reference/6.1/search-request-search-after.html
b. Make a normal Search request
c. Search needs to be sorted
d. Needs a tiebraker (Best would be an uniqueID) ** the used field needs to have a doc value **
e. Search_after (last score, and _id (tiebraker)), is used to get the next "page
f. stateless