/*
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 0.4 0.5 1306220 84032 ? Ssl 2025 1477:06 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1208 0.3 0.4 1305000 71784 ? Ssl 2025 1051:14 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11820836 107260 ? Ssl 2025 1661:21 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1311104 75300 ? Ssl 2025 1066:18 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1298092 67520 ? Ssl 2025 1049:52 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.5 3.1 12209376 516612 ? Ssl 2025 13656:26 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 4.8 3.4 12224740 568796 ? Ssl 2025 14629:10 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 646486 0.3 0.4 1101916 66448 ? Ssl 04:03 3:34 node /home/sasa/dex8/dex8-worker/starter.js www-data 726027 0.0 0.0 2608 524 ? S 22:25 0:00 sh -c ps -aux | grep node www-data 726029 0.0 0.0 3304 716 ? S 22:25 0:00 grep node sasa 1214480 0.3 0.7 22311168 125896 ? Ssl 2025 795:06 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1101568 65560 ? Ssl 2025 708:26 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101316 66868 ? Ssl 2025 706:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1101544 65768 ? Ssl 2025 712:18 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1101316 65092 ? Ssl 2025 708:44 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102464 67752 ? Ssl 2025 706:35 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.4 1167464 66396 ? Ssl 2025 696:46 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1099872 64264 ? Ssl 2025 694:13 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.7 0.7 11845212 130284 ? Ssl 2025 1522:34 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 65268 ? Ssl 2025 706:05 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11832096 122072 ? Ssl Apr20 391:18 node /home/sasa/dex8/dex8-www/server/index.js sasa 1904154 0.6 0.7 11836412 114724 ? Ssl Apr25 238:38 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.8 0.8 1176152 131048 ? Ssl 2025 2393:37 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.5 11803192 93016 ? Ssl 2025 1749:43 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799176 84368 ? Ssl 2025 1454:47 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.7 0.5 1332492 86008 ? Ssl Feb21 917:46 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js