/*
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 1309856 46260 ? Ssl 2025 1691:51 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.4 11823932 75704 ? Ssl 2025 2671:36 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.2 1305752 44944 ? Ssl 2025 1712:39 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.2 1301856 42480 ? Ssl 2025 1686:30 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.2 12262868 533972 ? Ssl 2025 21648:15 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 8.1 4.2 12377168 697316 ? Ssl 2025 41772:47 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. www-data 84405 0.0 0.0 2608 596 ? S 22:42 0:00 sh -c ps -aux | grep node www-data 84407 0.0 0.0 3304 712 ? S 22:42 0:00 grep node sasa 1214480 0.3 0.5 22311168 91636 ? Ssl 2025 1504:22 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.2 1103104 35136 ? Ssl 2025 1386:55 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.2 1102852 35620 ? Ssl 2025 1385:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.2 1102312 35180 ? Ssl 2025 1396:36 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.2 1102084 34716 ? Ssl 2025 1389:37 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.2 1101952 35756 ? Ssl 2025 1384:36 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.2 1166440 33360 ? Ssl 2025 1376:10 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.2 1100384 32908 ? Ssl 2025 1369:28 node /home/sasa/dex8/dex8-worker/starter.js sasa 1216489 0.3 0.2 1101304 33896 ? Ssl 2025 1385:31 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.6 11827232 99452 ? Ssl Apr20 2211:21 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.6 0.3 1304100 56480 ? Ssl May31 1228:46 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.3 11798848 55736 ? Ssl Aug15 395:15 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2072475 0.7 0.5 1162332 91648 ? Ssl Sep24 203:35 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2075109 8.5 0.5 11712352 93840 ? Ssl Sep24 2358:19 node /home/sasa/dex8/dex8-api/starter.js sasa 2075416 0.6 0.3 1345104 57436 ? Ssl Sep24 180:32 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 2448036 1.1 0.8 11896528 141116 ? Ssl Aug21 910:26 node /home/sasa/miko/miko-hr/server/index.js sasa 2663246 2.2 0.6 11850384 105232 ? Ssl Aug23 1636:51 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.4 11812564 72692 ? Ssl 2025 3030:26 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.3 11799488 54084 ? Ssl 2025 2485:28 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3615181 0.6 0.3 1331896 63932 ? Ssl Oct07 55:52 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.4 22302664 79636 ? Ssl Sep02 212:50 node /home/sasa/dex8/dex8-worker/starter.js