/*
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 1308672 74940 ? Ssl 2025 1459:21 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11822204 99388 ? Ssl 2025 2304:13 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1306980 73952 ? Ssl 2025 1477:04 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301520 69324 ? Ssl 2025 1455:16 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.4 12295680 564972 ? Ssl 2025 18621:35 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.1 3.7 12274300 609464 ? Ssl 2025 30951:32 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 124240 ? Ssl 2025 1247:13 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101824 65240 ? Ssl 2025 1140:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1102084 66428 ? Ssl 2025 1139:03 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102312 66352 ? Ssl 2025 1148:19 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 65456 ? Ssl 2025 1142:21 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66256 ? Ssl 2025 1138:21 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166440 64084 ? Ssl 2025 1129:47 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.4 1101920 65772 ? Ssl 2025 1124:26 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11846076 121928 ? Ssl 2025 2835:54 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101816 65132 ? Ssl 2025 1138:42 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11828060 126216 ? Ssl Apr20 1541:22 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.6 1323216 102076 ? Ssl May31 582:45 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798080 83572 ? Ssl Aug15 46:01 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.2 0.9 11896600 161204 ? Ssl Aug21 22:17 node /home/sasa/miko/miko-hr/server/index.js sasa 2508266 0.3 0.4 1101156 65884 ? Ssl 04:02 3:21 node /home/sasa/dex8/dex8-worker/starter.js sasa 2530171 0.5 0.5 1199124 82764 ? Ssl 08:56 4:00 node /home/sasa/miko/miko-hr/api/starter.js sasa 2568519 3.7 0.7 11846296 125184 ? Ssl 17:17 9:47 node /home/sasa/kriptus/kriptus-api/starter.js www-data 2589938 0.0 0.0 2608 532 ? S 21:36 0:00 sh -c ps -aux | grep node www-data 2589940 0.0 0.0 3304 648 ? S 21:36 0:00 grep node sasa 2628167 0.7 0.7 1177052 129724 ? Ssl 2025 3329:33 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.6 11834500 112476 ? Ssl 2025 2571:21 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 83528 ? Ssl 2025 2110:00 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1333704 88024 ? Ssl Feb21 1826:46 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js