/*
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 1308416 72612 ? Ssl 2025 1512:57 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11822788 99936 ? Ssl 2025 2388:59 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307748 74748 ? Ssl 2025 1531:35 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301520 69296 ? Ssl 2025 1508:40 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.4 12285184 570036 ? Ssl 2025 19442:58 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.3 3.7 12274300 608112 ? Ssl 2025 33197:27 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 124056 ? Ssl 2025 1306:33 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101824 64840 ? Ssl 2025 1197:26 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1101060 64556 ? Ssl 2025 1195:49 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102312 65660 ? Ssl 2025 1205:35 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102084 64940 ? Ssl 2025 1199:22 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1101952 65620 ? Ssl 2025 1195:10 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1167464 64932 ? Ssl 2025 1186:40 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 62900 ? Ssl 2025 1180:56 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11853380 125084 ? Ssl 2025 3119:44 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101816 64664 ? Ssl 2025 1195:37 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11856352 128556 ? Ssl Apr20 1720:06 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.6 1326352 106180 ? Ssl May31 680:33 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798848 82492 ? Rsl Aug15 126:09 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.0 0.9 11855572 150756 ? Rsl Aug21 194:37 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.7 1175516 129720 ? Ssl 2025 3465:16 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.8 0.8 11864676 132636 ? Ssl Aug23 461:34 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11826268 100576 ? Ssl 2025 2669:48 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 83080 ? Ssl 2025 2196:31 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1332864 86636 ? Ssl Feb21 1944:34 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.5 0.5 1264960 86220 ? Ssl Aug29 44:16 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11803684 92380 ? Ssl Sep02 8:29 node /home/sasa/dex8/dex8-worker/starter.js www-data 4003875 0.0 0.0 2608 532 ? S 00:01 0:00 sh -c ps -aux | grep node www-data 4003877 0.0 0.0 3304 720 ? S 00:01 0:00 grep node