/*
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 1309920 75288 ? Ssl 2025 1431:55 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11827844 101548 ? Ssl 2025 2261:09 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307492 73640 ? Ssl 2025 1449:36 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1301776 69572 ? Ssl 2025 1428:04 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.6 12304424 602372 ? Ssl 2025 18176:11 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 6.9 3.6 12269856 604104 ? Ssl 2025 29831:21 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 124180 ? Ssl 2025 1217:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101824 65416 ? Ssl 2025 1111:46 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1100804 65964 ? Ssl 2025 1110:08 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1102312 66096 ? Ssl 2025 1119:08 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102340 65616 ? Ssl 2025 1113:17 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102208 66932 ? Ssl 2025 1109:27 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1165928 64184 ? Ssl 2025 1100:52 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100384 64300 ? Ssl 2025 1095:38 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.8 0.7 11845564 124300 ? Ssl 2025 2787:44 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101304 65480 ? Ssl 2025 1109:44 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11826268 114724 ? Ssl Apr20 1464:51 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.6 1322032 101272 ? Ssl May31 544:06 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.3 0.4 11797012 81260 ? Ssl Aug15 6:01 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 1835274 1.9 0.7 11839084 117128 ? Ssl Aug15 30:15 node /home/sasa/kriptus/kriptus-api/starter.js sasa 1873432 0.3 0.3 1100384 65520 ? Ssl 04:02 3:13 node /home/sasa/dex8/dex8-worker/starter.js sasa 1904154 0.7 1.0 11894704 165788 ? Ssl Apr25 1146:35 node /home/sasa/miko/miko-hr/server/index.js www-data 1944134 0.0 0.0 2608 600 ? S 20:37 0:00 sh -c ps -aux | grep node www-data 1944136 0.0 0.0 3304 720 ? S 20:37 0:00 grep node sasa 2628167 0.7 0.7 1175772 130672 ? Ssl 2025 3259:05 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.5 11806928 96596 ? Ssl 2025 2517:45 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 83112 ? Ssl 2025 2065:54 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1333448 87104 ? Ssl Feb21 1766:29 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js