Elasticsearach

random

{
  "query" : { "query_string" : {"query" : "*:*"} },
  "sort" : {
    "_script" : { 
        "script" : "(doc['_id'].value + salt).hashCode()",
        "type" : "number",
        "params" : {
            "salt" : 10000
        },
        "order" : "asc"
    }
  }  
}

{
 "query": {
    "function_score" : {
      "query" : { "match_all": {} },
      "random_score" : {}
    }
  },
  "size":2
}