/*
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 1310464 74096 ? Ssl 2025 1445:52 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11821948 99500 ? Ssl 2025 2282:57 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307748 74388 ? Ssl 2025 1463:29 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301776 69804 ? Ssl 2025 1441:50 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.5 12285340 576068 ? Ssl 2025 18351:28 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.0 3.6 12270112 604664 ? Ssl 2025 30391:19 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 125032 ? Ssl 2025 1232:17 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101568 65156 ? Ssl 2025 1126:21 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1100804 65640 ? Ssl 2025 1124:46 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102568 66996 ? Ssl 2025 1133:53 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102340 65680 ? Ssl 2025 1127:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66228 ? Ssl 2025 1124:02 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166440 64740 ? Ssl 2025 1115:29 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100896 64848 ? Ssl 2025 1110:10 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11845820 123276 ? Ssl 2025 2811:58 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1102584 65468 ? Ssl 2025 1124:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11856808 129424 ? Ssl Apr20 1502:33 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.5 1322032 98276 ? Ssl May31 563:37 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798592 84400 ? Ssl Aug15 25:51 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 1835274 2.2 0.6 11839720 112028 ? Ssl Aug15 133:56 node /home/sasa/kriptus/kriptus-api/starter.js sasa 1904154 0.7 0.9 11888744 159156 ? Ssl Apr25 1188:59 node /home/sasa/miko/miko-hr/server/index.js sasa 2084881 0.3 0.5 22293648 98036 ? Ssl Aug18 8:21 node /home/sasa/dex8/dex8-worker/starter.js www-data 2260559 0.0 0.0 2608 536 ? S 21:07 0:00 sh -c ps -aux | grep node www-data 2260561 0.0 0.0 3304 712 ? S 21:07 0:00 grep node sasa 2628167 0.7 0.7 1176284 129976 ? Ssl 2025 3291:41 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.6 11849092 112284 ? Ssl 2025 2547:25 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 82996 ? Ssl 2025 2088:09 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1333448 87676 ? Ssl Feb21 1796:56 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js