/*
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 0.2 1310112 48408 ? Ssl 2025 1651:22 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.4 11823152 74704 ? Ssl 2025 2607:19 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.2 1306008 44672 ? Ssl 2025 1671:35 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.2 1301856 42120 ? Ssl 2025 1646:00 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.2 12255444 533248 ? Ssl 2025 21131:23 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.9 4.2 12372212 693056 ? Ssl 2025 39648:51 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.5 22311168 91688 ? Ssl 2025 1459:23 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.2 1101568 34324 ? Ssl 2025 1343:48 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.2 1100804 34780 ? Ssl 2025 1341:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.2 1102056 35140 ? Ssl 2025 1353:08 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.2 1102340 35756 ? Ssl 2025 1346:22 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.2 1102976 36836 ? Ssl 2025 1341:29 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.2 1165928 33904 ? Ssl 2025 1333:05 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.2 1101920 35824 ? Ssl 2025 1326:34 node /home/sasa/dex8/dex8-worker/starter.js sasa 1216489 0.3 0.2 1101560 34484 ? Ssl 2025 1342:17 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.5 11826524 92284 ? Ssl Apr20 2100:21 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.6 0.3 1304092 58352 ? Ssl May31 1117:48 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.3 11799104 55480 ? Ssl Aug15 333:55 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2072475 0.7 0.5 1160308 91068 ? Ssl Sep24 108:18 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2075109 12.7 0.5 11709228 92812 ? Ssl Sep24 1833:43 node /home/sasa/dex8/dex8-api/starter.js sasa 2075416 0.6 0.3 1332408 57484 ? Rsl Sep24 93:01 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 2448036 1.2 0.8 11858840 137412 ? Ssl Aug21 791:58 node /home/sasa/miko/miko-hr/server/index.js sasa 2663246 2.2 0.6 11848288 107236 ? Ssl Aug23 1369:06 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.5 11833044 86164 ? Ssl 2025 2953:25 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.3 11799488 54496 ? Ssl 2025 2419:43 node /home/sasa/@mikosoft/dodo-examples/server/index.js www-data 3282660 0.0 0.0 2608 524 ? S 19:53 0:00 sh -c ps -aux | grep node www-data 3282662 0.0 0.0 3304 636 ? S 19:53 0:00 grep node sasa 3358795 0.6 0.3 1267548 61896 ? Ssl Aug29 339:25 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.4 22299848 80156 ? Ssl Sep02 164:36 node /home/sasa/dex8/dex8-worker/starter.js