/*
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 1310112 70428 ? Ssl 2025 1637:29 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.5 11821872 94836 ? Ssl 2025 2585:12 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307032 67752 ? Ssl 2025 1657:34 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.3 1302112 64944 ? Ssl 2025 1632:07 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.4 12288156 571032 ? Ssl 2025 21022:43 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.9 4.3 12372468 711160 ? Ssl 2025 38921:42 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 118328 ? Ssl 2025 1443:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1102848 60704 ? Ssl 2025 1329:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1103364 61724 ? Ssl 2025 1327:13 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1102312 60120 ? Ssl 2025 1338:16 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 60064 ? Ssl 2025 1331:33 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.3 1102208 60580 ? Ssl 2025 1326:43 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1167720 59416 ? Ssl 2025 1318:16 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 58424 ? Ssl 2025 1311:52 node /home/sasa/dex8/dex8-worker/starter.js sasa 1216489 0.3 0.3 1101560 59148 ? Ssl 2025 1327:28 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.8 11846704 131404 ? Ssl Apr20 2064:50 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.5 0.4 1303552 76400 ? Ssl May31 1031:34 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.4 11799424 79968 ? Ssl Aug15 312:55 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2072475 0.8 0.6 1158332 108180 ? Ssl Sep24 79:37 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2075109 12.3 0.6 11709884 111724 ? Ssl Sep24 1217:04 node /home/sasa/dex8/dex8-api/starter.js sasa 2075416 0.6 0.4 1332408 80448 ? Ssl Sep24 62:41 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 2448036 1.2 1.1 11915260 182896 ? Ssl Aug21 751:32 node /home/sasa/miko/miko-hr/server/index.js sasa 2663246 2.2 0.7 11847280 123936 ? Ssl Aug23 1278:31 node /home/sasa/kriptus/kriptus-api/starter.js www-data 2908785 0.0 0.0 2608 596 ? S 16:27 0:00 sh -c ps -aux | grep node www-data 2908787 0.0 0.0 3304 724 ? S 16:27 0:00 grep node sasa 3168557 0.6 0.5 11812564 96676 ? Ssl 2025 2926:42 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.4 11799488 77944 ? Ssl 2025 2397:10 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3358795 0.6 0.5 1267804 84568 ? Ssl Aug29 309:17 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.6 22299336 98620 ? Ssl Sep02 148:15 node /home/sasa/dex8/dex8-worker/starter.js