/*
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 1309440 76068 ? Ssl 2025 1567:47 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11820740 100116 ? Ssl 2025 2475:32 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307492 72800 ? Ssl 2025 1586:51 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301008 68532 ? Ssl 2025 1563:15 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.5 12283348 583084 ? Ssl 2025 20113:26 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.5 3.7 12280708 616992 ? Ssl 2025 35560:55 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. www-data 1156278 0.0 0.0 2608 532 ? S 06:53 0:00 sh -c ps -aux | grep node www-data 1156280 0.0 0.0 3304 708 ? S 06:53 0:00 grep node sasa 1214480 0.3 0.7 22311168 124020 ? Ssl 2025 1367:27 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101824 64980 ? Ssl 2025 1255:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1101060 65272 ? Ssl 2025 1253:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1102312 65408 ? Ssl 2025 1264:18 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 64820 ? Ssl 2025 1257:50 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 65780 ? Ssl 2025 1253:24 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166184 63828 ? Ssl 2025 1244:54 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 63204 ? Ssl 2025 1238:54 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.9 0.7 11847748 123992 ? Ssl 2025 3451:46 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101560 64648 ? Ssl 2025 1253:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11820320 115512 ? Ssl Apr20 1871:24 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.5 0.4 1303892 80780 ? Ssl May31 785:21 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798848 83744 ? Ssl Aug15 208:25 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 1.3 1.0 11895220 164776 ? Ssl Aug21 508:07 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.7 1175516 128808 ? Ssl 2025 3592:21 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.4 0.7 11845532 127232 ? Ssl Aug23 830:23 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11825860 101524 ? Ssl 2025 2774:51 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 83068 ? Ssl 2025 2285:04 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1333376 87320 ? Ssl Feb21 2065:05 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.6 0.5 1266904 89308 ? Ssl Aug29 161:41 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11804964 94268 ? Ssl Sep02 69:12 node /home/sasa/dex8/dex8-worker/starter.js