/*
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 74280 ? Ssl 2025 1553:37 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11823556 100596 ? Ssl 2025 2453:11 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1308260 74716 ? Ssl 2025 1572:36 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301264 68824 ? Ssl 2025 1549:09 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.6 12303060 601924 ? Ssl 2025 19894:52 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.5 3.7 12280708 616668 ? Ssl 2025 34966:04 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. www-data 828914 0.0 0.0 2608 596 ? S 03:39 0:00 sh -c ps -aux | grep node www-data 828916 0.0 0.0 3304 716 ? S 03:39 0:00 grep node sasa 1214480 0.3 0.7 22311168 123736 ? Ssl 2025 1351:45 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101568 64352 ? Ssl 2025 1240:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1100804 64312 ? Ssl 2025 1239:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102568 65896 ? Ssl 2025 1249:11 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102596 65432 ? Ssl 2025 1242:44 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66412 ? Ssl 2025 1238:23 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166440 64000 ? Ssl 2025 1229:52 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1101408 63936 ? Ssl 2025 1223:55 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11847492 123276 ? Ssl 2025 3313:32 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101816 63860 ? Ssl 2025 1238:56 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.6 11806812 107940 ? Ssl Apr20 1834:11 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.5 1303428 82356 ? Ssl May31 752:27 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798848 84444 ? Rsl Aug15 187:08 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.2 1.1 11886508 181796 ? Ssl Aug21 412:28 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.8 1176796 132444 ? Ssl 2025 3557:23 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.4 0.7 11849176 126440 ? Ssl Aug23 737:47 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11825756 99384 ? Ssl 2025 2748:08 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 82568 ? Ssl 2025 2262:11 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1332864 86204 ? Ssl Feb21 2034:07 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.6 0.5 1266648 88760 ? Ssl Aug29 131:35 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11803172 92632 ? Ssl Sep02 53:21 node /home/sasa/dex8/dex8-worker/starter.js