Ytukyg

I am testing rocksdb for java api. I put a key-value entry into the map, and then wait for 20s, then get from map. Why the entry is not deleted?
this is my code:

import org.rocksdb.Options;

import org.rocksdb.RocksDBException;

import org.rocksdb.TtlDB;



public class Test2 {

    public static void main(String args) throws Exception {

        TtlDB.loadLibrary();

        Options options = new Options()

                .setCreateIfMissing(true);





        TtlDB db = TtlDB.open(options, args[0],20,false);

        if(args.length > 3 && "put".equals(args[1])) {

            db.put(args[2].getBytes(), args[3].getBytes());

        }



        byte arr = db.get(args[2].getBytes());

        if(arr != null) {

            System.out.println(new String(arr));

        } else {

            System.out.println(arr);

        }

        System.out.println(db.get(args[2].getBytes()));

        Thread.sleep(21000);

        System.out.println(db.get(args[2].getBytes()));

        db.close();

    }

}

Expired TTL values are deleted in compaction only:(Timestamp + ttl < time_now)

https://github.com/facebook/rocksdb/wiki/Time-to-Live