/*
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 1310880 70520 ? Ssl 2025 1623:53 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.5 11820608 95680 ? Ssl 2025 2563:41 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1308176 68968 ? Ssl 2025 1643:37 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.3 1301856 64216 ? Ssl 2025 1618:37 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.4 12276068 557356 ? Ssl 2025 20758:06 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.8 4.2 12358880 695392 ? Rsl 2025 38230:35 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 118808 ? Ssl 2025 1428:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101568 59928 ? Ssl 2025 1314:38 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1101060 59728 ? Ssl 2025 1312:52 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1103080 60496 ? Ssl 2025 1323:46 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 59916 ? Ssl 2025 1317:07 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.3 1102464 61672 ? Ssl 2025 1312:21 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1165928 58852 ? Ssl 2025 1303:53 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1099872 58544 ? Ssl 2025 1297:34 node /home/sasa/dex8/dex8-worker/starter.js sasa 1216489 0.3 0.3 1103096 60560 ? Ssl 2025 1313:03 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11828256 119900 ? Ssl Apr20 2023:11 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.5 0.4 1303876 76084 ? Ssl May31 972:22 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.4 11800896 79440 ? Ssl Aug15 292:26 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2072475 0.7 0.6 1156844 105496 ? Ssl Sep24 42:28 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2075109 15.6 0.6 11705836 106824 ? Ssl Sep24 859:30 node /home/sasa/dex8/dex8-api/starter.js sasa 2075416 0.6 0.4 1332016 79296 ? Ssl Sep24 33:32 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 2448036 1.2 1.1 11926588 193300 ? Ssl Aug21 704:38 node /home/sasa/miko/miko-hr/server/index.js www-data 2564841 0.0 0.0 2608 532 ? S 14:55 0:00 sh -c ps -aux | grep node www-data 2564843 0.0 0.0 3304 716 ? S 14:55 0:00 grep node sasa 2663246 2.2 0.7 11845808 125456 ? Ssl Aug23 1189:38 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.5 11827388 97288 ? Ssl 2025 2900:13 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.4 11799488 77908 ? Ssl 2025 2375:13 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3358795 0.6 0.5 1266904 84408 ? Ssl Aug29 280:05 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 22297800 97516 ? Ssl Sep02 132:30 node /home/sasa/dex8/dex8-worker/starter.js