/*
This example shows asynchronous execution, non-blocking code.
console.log(contents); blocks process and that's why
console.log('Do something else!'); must wait
Successfully loads files up to 1000MB.
*/
//load modules
var fs = require('fs');
//asynchronous file reading
fs.readFile('./testfiles/largefile1000mb.txt', function(err, content){
console.log(content);
});
//here process is not blocked. While file is loading the next console.log(); continue with execution
console.log('Do something else!');
/*
Conclusion: Due to asynchronous execution, first appear 'Do something else' then is file dumped.
*/
Do something else! undefined
$ps -aux | grep node (list all node processes) sasa 1194 0.5 0.5 1304452 83224 ? Ssl 2025 738:01 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1208 0.3 0.4 1305256 73432 ? Ssl 2025 535:53 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1224 0.8 0.7 11847312 127820 ? Ssl 2025 1212:23 node /home/sasa/dex8/dex8-www/server/index.js sasa 1236 0.6 0.6 11817508 104600 ? Ssl 2025 846:54 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1255 0.8 0.5 1331116 84168 ? Ssl 2025 1165:17 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 1257 0.3 0.4 1305176 73872 ? Ssl 2025 544:53 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1298412 67588 ? Ssl 2025 535:09 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.4 2.7 12141180 447596 ? Ssl 2025 6185:25 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 2.9 1.2 11906188 211224 ? Ssl 2025 4051:10 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 284563 0.3 0.4 1102688 67272 ? Ssl 03:02 4:11 node /home/sasa/dex8/dex8-worker/starter.js www-data 367923 0.0 0.0 2608 596 ? S 22:25 0:00 sh -c ps -aux | grep node www-data 367925 0.0 0.0 3304 716 ? S 22:25 0:00 grep node sasa 1214480 0.3 0.4 1101960 65932 ? Ssl 2025 157:57 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1102080 65572 ? Ssl 2025 158:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1102340 66708 ? Ssl 2025 157:51 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102056 66472 ? Ssl 2025 159:01 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102340 66280 ? Ssl 2025 158:06 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 67532 ? Ssl 2025 157:49 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1099880 63996 ? Ssl 2025 155:23 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1099616 63116 ? Ssl 2025 154:53 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.5 0.7 11704608 118288 ? Ssl 2025 262:01 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.4 1101560 65552 ? Ssl 2025 157:02 node /home/sasa/dex8/dex8-worker/starter.js sasa 2628167 0.9 0.8 1176120 131448 ? Ssl 2025 1146:23 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.5 11811472 95068 ? Ssl 2025 814:40 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11798920 84276 ? Ssl 2025 628:16 node /home/sasa/@mikosoft/dodo-examples/server/index.js