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From "david_hudavy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4170) how many concurrent users can be supported
Date Tue, 08 Dec 2015 03:37:11 GMT
david_hudavy created DRILL-4170:
-----------------------------------

             Summary: how many concurrent users can be supported
                 Key: DRILL-4170
                 URL: https://issues.apache.org/jira/browse/DRILL-4170
             Project: Apache Drill
          Issue Type: Test
          Components: Client - JDBC
    Affects Versions: 1.3.0
         Environment: drill1.3 JDBC SCRIPTS
            Reporter: david_hudavy
             Fix For: 1.4.0


import java.sql.Connection;
import java.sql.Statement;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class MultiThreadTestDrill {
 
    public static void main(String[] args) throws InterruptedException {
        int threadNum = 200;
        long tStart = System.currentTimeMillis();
        
        System.out.println(Thread.currentThread().getName() + "START");
        for (int ii = 0; ii < threadNum; ii++) {
            Thread t = new WorkerThread();
            t.start();
        }
        while (true) {
            if (!WorkerThread.hasThreadRunning()) {
                break;
            }
            Thread.sleep(500);
        }
        
        System.out.println(Thread.currentThread().getName() + "END");
        long tEnd = System.currentTimeMillis();
        System.out.println("TOTAL TIME:" + (tEnd - tStart)/1000 + "seconds");
    }
 
    public static class WorkerThread extends Thread {
        private static List<Thread> runningThreads = new ArrayList<Thread>();
 
        public WorkerThread() {
        }
 
        @Override
        public void run() {
            regist(this);
            // PRINT START INFORMATION
            System.out.println(Thread.currentThread().getName() + "START...");
            connectToDrill();
            unRegist(this);
            // PRINT END INFORMATION
            System.out.println(Thread.currentThread().getName() + "END");
        }
 
        public void regist(Thread t) {
            synchronized (runningThreads) {
                runningThreads.add(t);
            }
        }
 
        public void unRegist(Thread t) {
            synchronized (runningThreads) {
                runningThreads.remove(t);
            }
        }
 
        public static boolean hasThreadRunning() {

            return (runningThreads.size() > 0);
        }
         
        private void connectToDrill() {
            // TODO Auto-generated method stub
            
            String driver = "org.apache.drill.jdbc.Driver";
            
            String url = "jdbc:drill:drillbit=localhost";            
            String sql = "SELECT count(*) FROM mysql.datamart.StaticInf";
            try {
                
                Class.forName(driver);
                // connect drill
                Connection conn = (Connection) DriverManager.getConnection(url);
                if (!conn.isClosed())
                    System.out.println("Succeeded connecting to the Drill!");
                
                Statement statement = (Statement) conn.createStatement();
                 
                ResultSet rs = statement.executeQuery(sql);
                
                while (rs.next()) {
                    System.out.println(rs.getString(1));
                }
                rs.close();
                conn.close();
            } catch (ClassNotFoundException e) {
                System.out.println("Sorry,can`t find the Driver!");
                e.printStackTrace();
            } catch (SQLException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

mysql.datamart.StaticInf has 2144781 rows
















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