/*
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 1309600 75636 ? Ssl 2025 1610:18 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11821876 101516 ? Ssl 2025 2542:14 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1306724 71628 ? Ssl 2025 1629:31 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1302880 70860 ? Ssl 2025 1605:09 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.6 12323996 593248 ? Ssl 2025 20593:48 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.7 4.2 12359136 700844 ? Rsl 2025 37553:08 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 123332 ? Ssl 2025 1414:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101568 64600 ? Ssl 2025 1300:16 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1100804 64244 ? Ssl 2025 1298:32 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102312 65804 ? Ssl 2025 1309:17 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 64312 ? Ssl 2025 1302:41 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.3 1101696 65452 ? Ssl 2025 1298:01 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166184 63520 ? Ssl 2025 1289:30 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 63416 ? Ssl 2025 1283:18 node /home/sasa/dex8/dex8-worker/starter.js sasa 1216489 0.3 0.3 1101560 64132 ? Ssl 2025 1298:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.9 11856416 161672 ? Ssl Apr20 1985:21 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.5 0.4 1303840 81872 ? Ssl May31 860:37 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798592 83508 ? Ssl Aug15 271:57 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2072475 0.8 0.6 1164212 105212 ? Ssl Sep24 9:53 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2075109 0.5 0.6 11703660 107808 ? Ssl Sep24 6:23 node /home/sasa/dex8/dex8-api/starter.js sasa 2075416 0.5 0.5 1330404 83448 ? Ssl Sep24 6:24 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js www-data 2151419 0.0 0.0 2608 592 ? S 14:07 0:00 sh -c ps -aux | grep node www-data 2151421 0.0 0.0 3304 716 ? S 14:07 0:00 grep node sasa 2448036 1.3 0.9 11858072 160168 ? Ssl Aug21 663:45 node /home/sasa/miko/miko-hr/server/index.js sasa 2663246 2.3 0.7 11851352 129180 ? Ssl Aug23 1103:46 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.5 11805788 94484 ? Ssl 2025 2874:24 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 84264 ? Ssl 2025 2353:15 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3358795 0.6 0.5 1266904 89356 ? Ssl Aug29 251:00 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11806500 95860 ? Ssl Sep02 116:51 node /home/sasa/dex8/dex8-worker/starter.js