Node.jsファイル書き込み例

Node.jsファイル書き込み例です。

var fs = require('fs');

(function () {
    var data = "write 日本語!";
    fs.writeFile('日本語.txt', data, function (err) {
        if (err)
            console.log(err);
    });
})();

nginx最大パフォーマンスを出すための基本設定

nginx最大限にスピードを出すために、設定パラメーターをチュニングしました。

nginx設定例

user www-data;
pid /var/run/nginx.pid;
worker_processes auto;
worker_rlimit_nofile 100000;

proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

events {
    worker_connections 2048;
    multi_accept on;
    use epoll;
}

http {
    server_tokens off;
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;

    access_log off;
    error_log /var/log/nginx/error.log crit;

    keepalive_timeout 10;
    client_header_timeout 10;
    client_body_timeout 10;
    reset_timedout_connection on;
    send_timeout 10;

    limit_conn_zone $binary_remote_addr zone=addr:5m;
    limit_conn addr 100;

    include /etc/nginx/mime.types;
    default_type text/html;
    charset UTF-8;

    gzip on;
    gzip_http_version 1.0;
    gzip_disable "msie6";
    gzip_proxied any;
    gzip_min_length 1024;
    gzip_comp_level 6;
    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript application/json;

    open_file_cache max=100000 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 2;
    open_file_cache_errors on;

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

Node.jsエラー処理例(domainモジュール)

Node.jsエラー処理例(domainモジュール)

// Node.jsエラー処理例(domainモジュール)
var fs = require('fs');
var util = require('util');

(function () {
    var d = require('domain').create();
    d.on('error', function (err) {
        //console.log('domain error:', toJson(err));
        console.log(err.stack);
    });
    d.run(function () {
        f1();
    });
})();

function f1() {
    fs.readFile('package.json', function (err, data) {
        if (err) throw err;
        console.log(a.aa.aaa, data.toString());
    });
}

function toJson(obj) {
    return util.inspect(obj, {
        showHidden: true,
        depth: null
    });
}