/*
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 1304232 71188 ? Ssl 2025 1136:47 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11822296 107984 ? Ssl 2025 1795:59 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1304584 71484 ? Ssl 2025 1152:22 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1297836 67500 ? Ssl 2025 1135:09 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.3 2.6 12149372 438120 ? Ssl 2025 14407:00 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 5.4 3.5 12237816 579744 ? Ssl 2025 18079:46 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 125664 ? Ssl 2025 890:27 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1103104 66864 ? Ssl 2025 799:22 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101316 65876 ? Ssl 2025 797:48 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1101288 65168 ? Ssl 2025 803:57 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102084 65320 ? Ssl 2025 799:55 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1100672 65888 ? Ssl 2025 797:21 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.4 1166184 65524 ? Ssl 2025 787:50 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1101152 65272 ? Ssl 2025 784:44 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.7 0.7 11844700 124064 ? Ssl 2025 1672:51 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 65452 ? Ssl 2025 796:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11828316 116640 ? Ssl Apr20 624:08 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.4 1302676 78336 ? Ssl May31 68:17 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1904154 0.6 0.8 11854000 134604 ? Ssl Apr25 409:21 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.8 0.8 1176796 131988 ? Ssl 2025 2575:33 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2942549 0.9 0.3 1095516 58460 ? Ssl 04:02 0:01 node /home/sasa/dex8/dex8-worker/starter.js www-data 2942752 0.0 0.0 2608 528 ? S 04:04 0:00 sh -c ps -aux | grep node www-data 2942754 0.0 0.0 3304 724 ? S 04:04 0:00 grep node sasa 3168557 0.6 0.6 11834936 109876 ? Ssl 2025 1912:08 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799176 84512 ? Ssl 2025 1591:39 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.7 0.5 1333192 87108 ? Ssl Feb21 1113:35 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js