/*
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 1309952 75024 ? Ssl 2025 1595:32 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11822388 99508 ? Ssl 2025 2519:39 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1308260 73500 ? Ssl 2025 1614:50 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301856 69456 ? Ssl 2025 1590:58 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.4 12292096 560396 ? Ssl 2025 20384:08 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.6 4.2 12349224 690556 ? Ssl 2025 36835:38 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 124168 ? Ssl 2025 1398:13 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1103104 66008 ? Ssl 2025 1285:08 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1100804 64140 ? Ssl 2025 1283:25 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1102568 65180 ? Ssl 2025 1294:01 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 64624 ? Ssl 2025 1287:28 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.3 1102208 65496 ? Ssl 2025 1282:52 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166184 64040 ? Ssl 2025 1274:23 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 63396 ? Ssl 2025 1268:14 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.9 0.7 11847236 125020 ? Ssl 2025 3503:34 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 63896 ? Ssl 2025 1283:29 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11828060 116560 ? Ssl Apr20 1940:56 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.5 0.4 1303584 81304 ? Ssl May31 826:03 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798848 84760 ? Ssl Aug15 250:23 node /home/sasa/kriptus/kriptus-panel/server/index.js www-data 1831630 0.0 0.0 2608 596 ? S 09:59 0:00 sh -c ps -aux | grep node www-data 1831632 0.0 0.0 3304 720 ? S 09:59 0:00 grep node sasa 2448036 1.3 0.9 11885184 156720 ? Ssl Aug21 609:11 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.8 1176284 131080 ? Ssl 2025 3653:09 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.3 0.7 11846044 128320 ? Ssl Aug23 1010:54 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11823708 100036 ? Ssl 2025 2828:20 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 82696 ? Ssl 2025 2330:10 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1332864 85112 ? Ssl Feb21 2125:51 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.6 0.5 1266136 87968 ? Ssl Aug29 220:27 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11805476 94668 ? Ssl Sep02 100:35 node /home/sasa/dex8/dex8-worker/starter.js