/*
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 1308928 74396 ? Ssl 2025 1526:13 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11821252 98964 ? Ssl 2025 2410:01 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1306468 72108 ? Ssl 2025 1545:08 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301776 69016 ? Ssl 2025 1521:53 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.3 12263480 554168 ? Ssl 2025 19538:22 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.3 3.7 12280452 616436 ? Rsl 2025 33773:23 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. www-data 132213 0.0 0.0 2608 596 ? S 00:28 0:00 sh -c ps -aux | grep node www-data 132215 0.0 0.0 3304 712 ? S 00:28 0:00 grep node sasa 1214480 0.3 0.7 22311168 124144 ? Ssl 2025 1321:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101824 64872 ? Ssl 2025 1211:34 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1101060 65252 ? Ssl 2025 1209:56 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1102312 65460 ? Ssl 2025 1219:49 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 64556 ? Ssl 2025 1213:33 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66276 ? Ssl 2025 1209:19 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.4 1168232 65996 ? Ssl 2025 1200:47 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 63112 ? Ssl 2025 1194:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11847748 124196 ? Ssl 2025 3191:48 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101816 64712 ? Ssl 2025 1209:48 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11833180 122724 ? Ssl Apr20 1768:32 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.5 1303656 82264 ? Ssl May31 704:16 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798592 82388 ? Ssl Aug15 146:03 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2448036 0.9 1.1 11915568 180736 ? Ssl Aug21 234:53 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.7 1176284 129960 ? Ssl 2025 3492:37 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.6 0.7 11853004 130548 ? Ssl Aug23 551:23 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.5 11806084 95116 ? Ssl 2025 2695:26 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 82868 ? Ssl 2025 2217:59 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1339520 86320 ? Ssl Feb21 1973:58 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.6 0.5 1265736 86524 ? Ssl Aug29 72:52 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11801380 90332 ? Ssl Sep02 23:00 node /home/sasa/dex8/dex8-worker/starter.js