/*
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 1208 0.3 0.4 1312000 75472 ? Ssl 2025 1486:13 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11821508 100836 ? Ssl 2025 2346:48 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307492 74048 ? Ssl 2025 1504:23 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301520 68720 ? Ssl 2025 1482:06 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.5 12291072 588344 ? Ssl 2025 18941:55 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.2 3.7 12273788 608680 ? Rsl 2025 32071:18 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 124352 ? Ssl 2025 1276:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101568 65420 ? Ssl 2025 1169:10 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1100804 65284 ? Ssl 2025 1167:35 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102312 66576 ? Ssl 2025 1177:04 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1103364 66768 ? Ssl 2025 1170:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66616 ? Ssl 2025 1166:53 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166184 64824 ? Ssl 2025 1158:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1099872 63588 ? Ssl 2025 1152:48 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11846576 122220 ? Ssl 2025 2948:43 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 64344 ? Ssl 2025 1167:19 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.9 11885300 158000 ? Ssl Apr20 1633:37 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.6 1322096 101448 ? Ssl May31 628:34 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798592 82704 ? Ssl Aug15 86:17 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.0 0.9 11892428 158468 ? Ssl Aug21 112:10 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.8 1176796 131864 ? Ssl 2025 3392:58 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.8 0.7 11839612 120684 ? Ssl Aug23 218:01 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.5 11805532 95504 ? Ssl 2025 2618:40 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 83628 ? Ssl 2025 2153:30 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3193750 0.3 0.4 1102684 67176 ? Ssl 04:02 3:42 node /home/sasa/dex8/dex8-worker/starter.js sasa 3255220 0.5 0.5 1264596 84812 ? Ssl 16:31 2:20 node /home/sasa/miko/miko-hr/api/starter.js sasa 3264954 0.6 0.5 1332936 87404 ? Ssl Feb21 1885:43 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js www-data 3285335 0.0 0.0 2608 592 ? S 23:28 0:00 sh -c ps -aux | grep node www-data 3285337 0.0 0.0 3304 716 ? S 23:28 0:00 grep node