/*
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 1309952 74224 ? Ssl 2025 1499:31 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11823044 100152 ? Ssl 2025 2367:54 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307236 73444 ? Ssl 2025 1518:02 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301520 69280 ? Ssl 2025 1495:25 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.7 12322872 620976 ? Ssl 2025 19240:20 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.2 3.6 12273532 605228 ? Rsl 2025 32638:00 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 123464 ? Ssl 2025 1291:47 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101568 64632 ? Ssl 2025 1183:19 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1100804 64476 ? Ssl 2025 1181:43 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102056 65524 ? Ssl 2025 1191:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 64144 ? Ssl 2025 1185:11 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.3 1101952 65156 ? Ssl 2025 1181:02 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166952 64392 ? Ssl 2025 1172:31 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100384 63084 ? Ssl 2025 1166:54 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11849796 124120 ? Ssl 2025 3064:45 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 64368 ? Ssl 2025 1181:30 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 1.0 11904988 176592 ? Ssl Apr20 1674:10 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.5 1303876 82664 ? Ssl May31 657:54 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798592 82308 ? Ssl Aug15 106:14 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 0.9 1.0 11902924 167684 ? Ssl Aug21 147:32 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.7 1175772 130744 ? Ssl 2025 3432:13 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.8 0.8 11854672 132796 ? Ssl Aug23 342:34 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11828612 105364 ? Ssl 2025 2644:05 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 82940 ? Ssl 2025 2175:01 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1332680 85944 ? Ssl Feb21 1915:06 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.5 0.5 1264852 85676 ? Ssl Aug29 18:28 node /home/sasa/miko/miko-hr/api/starter.js sasa 3436240 0.3 0.5 22292720 96436 ? Ssl Aug30 8:38 node /home/sasa/dex8/dex8-worker/starter.js www-data 3668549 0.0 0.0 2608 532 ? S 23:44 0:00 sh -c ps -aux | grep node www-data 3668551 0.0 0.0 3304 720 ? S 23:44 0:00 grep node