PHP’s Zend Opcache Config & Web Viewer

PHP 5.5. has zend opcache support in core. Since APC is not updated from long time, we made a switch to new Zend Opcache. Below is our config and web-based stats viewer.

PHP’s Zend Opcache Config

In your php.ini or /etc/php5/fpm/conf.d/05-opcache.ini 

zend_extension=opcache.so
opcache.memory_consumption=512
opcache.max_accelerated_files=50000

;following can be commented for production server
opcache.revalidate_freq=0
opcache.consistency_checks=1

OCFS2 cluster – quick setup guide

OCFS2 is a POSIX-compliant shared-disk cluster file system for Linux capable of providing both high performance and high availability. Cluster-aware applications can make use of parallel I/O for higher performance. OCFS2 is mostly used to host Oracle Real application clusters (RAC) database on Linux clusters.

The below steps shows how to create ocfs2 filesystem on top a multipath’d SAN lun and mount it on Linux clusters.

1. Identify the nodes that will be part of your cluster.

2. Export/Zone the LUNs on the SAN end and check whether they are accessible on all the hosts of the cluster. (fdisk -l or multipath -ll)

3. If you need multipathing, configure multipath and the multipathing policy based on your requirement. For Linux multipath setup, refer Redhat’s multipath guide.

4. Create OCFS2 configuration file (/etc/ocfs2/cluster.conf) on all the cluster nodes.

How to Take Ownership of a File, Folder Using Command-line in Window 7 and Vista

Taking ownership of a file

Click Start, click All Programs, click Accessories, right-clickCommand Prompt, and then click Run as Administrator.

Type the following command and press ENTER:  TAKEOWN /F<filename>

(Replace the text <filename> with the full path of the actual file.)

If the operation was successful, you should see the following message:

“SUCCESS: The file (or folder): “filename” now owned by user “Computer Name\User name“.”

Then to assign the Administrators group Full Control Permissions for the file, you may use the ICACLS command.

Use this syntax:  ICACLS <filename> /grant administrators:F

Cài đặt thêm extension openssl vào PHP

Cách cài đặt thêm extension openssl vào PHP, không cần build lại toàn bộ PHP

Tải bản PHP tương ứng với bản đang chạy về server, giải nén

cd {php_dir (vừa giải nén)}/ext/openssl 

Chạy phpize (lưu ý phải chạy đúng với phiên bản php đang chạy trong trường hợp cài nhiều bản php trên server) Ví dụ:  sudo /u01/app/httpd2/php/bin/phpize

./configure –with-php-config=/u01/app/httpd2/php/bin/php-config

make

make install

Lưu ý: 

- Có thể file {php_dir (vừa giải nén)}/ext/openssl/config.m4  không tồn tại hoặc bị sai tên –> tìm file khác hoặc đổi lại tên là được.

Custom symfony error pages for 404 and 500 errors

500 error page

- Since symfony 1.2 your error page must be stored as error.html.php in the folder /config/errors/

- Default file:/lib/vendor/symfony/lib/exception/data/error.html.php

Available variables:  (một số biến được dùng trong file error)

- $exception: The exception.

- $code: The status code. Defaults to 500 but might have been replaced by $response->getStatusCode().

- $text: The status text. Defaults to “Internal server error” but might have been replaced by $response->getStatusText().

- $format: The request format. Defaults to “html” but might have been replaced by $response->getRequestFormat().

symfony execute raw query with doctrine

$query = ‘INSERT INTO table_name (`field1`, `field2 `, `content`, `created_at`) values ‘ ….

$conn = Doctrine_Manager::connection();
$pdo = $conn->execute($query);

Enable logging in the Symfony production environment

To enable symfony logging edit the file apps/frontend/config/settings.yml

prod:   .settings:     logging_enabled:        on

edit apps/frontend/config/factories.yml

prod:   logger:     class: sfAggregateLogger     param:       level: debug