/*
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 1309440 74496 ? Ssl 2025 1472:53 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11821252 99004 ? Ssl 2025 2325:40 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1308004 74020 ? Ssl 2025 1490:44 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301520 70440 ? Ssl 2025 1468:44 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.3 12285240 552108 ? Ssl 2025 18780:49 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.1 3.7 12274044 608816 ? Ssl 2025 31511:08 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 124560 ? Ssl 2025 1262:09 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101824 65432 ? Ssl 2025 1154:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101060 65612 ? Ssl 2025 1153:24 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102312 65584 ? Ssl 2025 1162:46 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102084 65944 ? Ssl 2025 1156:43 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66920 ? Ssl 2025 1152:41 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166184 64476 ? Ssl 2025 1144:08 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100384 63944 ? Ssl 2025 1138:41 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11845564 122372 ? Ssl 2025 2859:51 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 64968 ? Ssl 2025 1153:05 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11834204 124092 ? Ssl Apr20 1577:13 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.6 1322256 100648 ? Ssl May31 602:03 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798592 83752 ? Ssl Aug15 66:15 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.2 1.0 11889836 174160 ? Ssl Aug21 77:08 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.7 1176540 131016 ? Ssl 2025 3361:11 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.8 0.7 11846724 121460 ? Ssl Aug23 98:16 node /home/sasa/kriptus/kriptus-api/starter.js sasa 2733986 0.3 0.6 22294080 99176 ? Ssl Aug24 8:27 node /home/sasa/dex8/dex8-worker/starter.js sasa 2792279 0.5 0.5 1264848 86456 ? Ssl Aug24 10:01 node /home/sasa/miko/miko-hr/api/starter.js www-data 2930147 0.0 0.0 2608 532 ? S 23:05 0:00 sh -c ps -aux | grep node www-data 2930149 0.0 0.0 3304 712 ? S 23:05 0:00 grep node sasa 3168557 0.6 0.6 11847812 111364 ? Ssl 2025 2595:18 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 83584 ? Ssl 2025 2131:52 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1332936 85908 ? Ssl Feb21 1856:30 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js