/*
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 75248 ? Ssl 2025 1539:51 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11823556 99668 ? Ssl 2025 2431:35 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1308004 74508 ? Ssl 2025 1558:50 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301776 70036 ? Ssl 2025 1535:26 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 4.0 12355684 655956 ? Ssl 2025 19701:16 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.4 3.7 12280452 616564 ? Rsl 2025 34373:07 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. www-data 511140 0.0 0.0 2608 592 ? S 02:00 0:00 sh -c ps -aux | grep node www-data 511142 0.0 0.0 3304 652 ? S 02:00 0:00 grep node sasa 1214480 0.3 0.7 22311168 123548 ? Ssl 2025 1336:30 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101568 64680 ? Ssl 2025 1226:03 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1102084 65564 ? Ssl 2025 1224:26 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1102312 65244 ? Ssl 2025 1234:28 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 65056 ? Ssl 2025 1228:06 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66312 ? Ssl 2025 1223:49 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166184 63804 ? Ssl 2025 1215:17 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 63708 ? Ssl 2025 1209:26 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11847236 125960 ? Ssl 2025 3215:48 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101816 64364 ? Ssl 2025 1224:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.6 11818016 112592 ? Ssl Apr20 1800:08 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.4 1303844 81488 ? Ssl May31 724:05 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11799040 84292 ? Ssl Aug15 166:30 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.2 1.0 11897648 169796 ? Ssl Aug21 354:49 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.8 1177564 131836 ? Ssl 2025 3524:14 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.5 0.7 11844604 129592 ? Ssl Aug23 645:56 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11829084 103572 ? Ssl 2025 2721:56 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 82940 ? Ssl 2025 2240:01 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1332864 85448 ? Ssl Feb21 2004:03 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.6 0.5 1267160 89068 ? Ssl Aug29 102:09 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11802148 90652 ? Ssl Sep02 38:05 node /home/sasa/dex8/dex8-worker/starter.js