/*
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 74872 ? Ssl 2025 1581:30 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11820340 99952 ? Ssl 2025 2497:22 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1308004 74184 ? Ssl 2025 1600:39 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301520 68968 ? Ssl 2025 1576:56 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.4 12269524 569420 ? Ssl 2025 20258:30 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.6 3.9 12315984 654712 ? Ssl 2025 36165:59 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 123564 ? Ssl 2025 1382:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101568 64488 ? Ssl 2025 1270:14 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1100804 64820 ? Ssl 2025 1268:33 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102568 66228 ? Ssl 2025 1278:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 65012 ? Ssl 2025 1272:28 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66280 ? Ssl 2025 1267:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1167208 64452 ? Ssl 2025 1259:28 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 62924 ? Ssl 2025 1253:23 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.9 0.7 11849284 128124 ? Ssl 2025 3478:07 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1102840 65400 ? Ssl 2025 1268:33 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.6 11806556 108988 ? Ssl Apr20 1906:50 node /home/sasa/dex8/dex8-www/server/index.js www-data 1497389 0.0 0.0 2608 536 ? S 07:36 0:00 sh -c ps -aux | grep node www-data 1497391 0.0 0.0 3304 720 ? S 07:36 0:00 grep node sasa 1631573 0.5 0.4 1303876 81532 ? Ssl May31 805:37 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798848 84316 ? Ssl Aug15 229:10 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.3 1.1 11913452 185396 ? Ssl Aug21 573:03 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.7 1174236 128360 ? Ssl 2025 3623:08 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.3 0.7 11859352 128836 ? Ssl Aug23 920:29 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11829596 105668 ? Ssl 2025 2801:58 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 82680 ? Ssl 2025 2307:20 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1346688 85172 ? Ssl Feb21 2095:08 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.6 0.5 1266904 89568 ? Ssl Aug29 190:54 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11805220 94880 ? Ssl Sep02 84:40 node /home/sasa/dex8/dex8-worker/starter.js