/*
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 1306368 84320 ? Ssl 2025 1458:32 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1208 0.3 0.4 1305000 72416 ? Ssl 2025 1037:43 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11821220 107728 ? Ssl 2025 1639:30 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1304920 73216 ? Ssl 2025 1052:20 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1298028 68280 ? Ssl 2025 1036:20 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.5 2.7 12151676 454452 ? Ssl 2025 13490:19 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 4.7 3.4 12222180 563624 ? Rsl 2025 14106:35 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 317669 0.3 0.4 1101660 66752 ? Ssl 04:02 3:33 node /home/sasa/dex8/dex8-worker/starter.js www-data 400460 0.0 0.0 2608 588 ? S 22:17 0:00 sh -c ps -aux | grep node www-data 400462 0.0 0.0 3304 720 ? S 22:17 0:00 grep node sasa 1214480 0.3 0.7 22311168 125396 ? Ssl 2025 780:01 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1101312 65900 ? Ssl 2025 694:06 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101060 66040 ? Ssl 2025 692:36 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1101544 66616 ? Ssl 2025 697:49 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102596 66228 ? Ssl 2025 694:17 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1101184 65728 ? Ssl 2025 692:14 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166696 65172 ? Ssl 2025 682:23 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 64220 ? Ssl 2025 679:56 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.7 0.8 11845212 131820 ? Ssl 2025 1498:46 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 64872 ? Ssl 2025 691:40 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11849308 123360 ? Ssl Apr20 360:24 node /home/sasa/dex8/dex8-www/server/index.js sasa 1904154 0.6 0.5 11802876 96028 ? Ssl Apr25 214:19 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.8 0.8 1178712 131668 ? Ssl 2025 2361:52 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.5 11802824 92340 ? Ssl 2025 1725:52 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799176 84416 ? Ssl 2025 1433:07 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.7 0.5 1332492 86380 ? Ssl Feb21 886:25 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js