Costruire un sito e-commerce in alta affidabilità con Magento e Zend Server Cluster Manager

Performance, High Availability, and
Scalability of Magento using Zend
Server
by Enrico Zimuel
Senior Consultant & Architect
Zend Technologies

enrico@zend.com

© All rights reserved. Zend Technologies, Inc.

About me
● Senior Consultant and Architect at Zend
Technologies since 2008
● Software Engineer since 1996: C/C++, Java,
PHP, Perl, VB/C#/ASP.NET, JavaScript
● More than 10 years of experience in PHP
● International speaker at web conferences:
PHPCon, PHP Barcelona Conference,
PHPDay, ZendCon, etc
● B.Sc. (Hons) in Economics and Computer
Science
● Blog on web dev't: http://www.zimuel.it/blog


Summary

● What is Magento?
● What is Zend Server?
● How to optimize the performance of
Magento using Zend Server
● Zend Server Cluster Manager
● High availability and scalability of
Magento using Zend Server
Cluster Manager


Magento


What is Magento?
● An open source feature-rich eCommerce platform
● Developed in PHP with Zend Framework
● First stable release March 2008
● Main features:
▶ Flexible
▶ Extendable
▶ Modular
▶ Upgradable
▶ Scalable
http://www.magentocommerce.com


Magento flavors
● Magento Community
▶ Free to download and use
● Magento Professional
▶ Annual subscription version
▶ Supported by Magento Solution Partners
▶ Warranty included
● Magento Enterprise
▶ World class support (SLA)
▶ Additional feature set
▶ Warranty included


Zend Server


What is Zend Server?
● Production ready, complete
PHP application stack
● Application monitoring and
problem diagnostics
● Multi-level performance
enhancement capabilities
● Cluster management, High
Availability, Scalable
● Technical support, software
updates and security hot
fixes http://www.zend.com/server/


Zend Server flavors
● Zend Server Community Edition
▶ Free to download and use
▶ Zend Optimizer+ (PHP accelerator)
▶ Zend Data Cache
▶ Java Bridge
● Zend Server
▶ Additional feature set: Monitoring, Code Tracing, Job
Queue, Page Caching, etc
▶ Software updates and security hot fixes


Zend Server flavors (2)

● Zend Server Cluster Manager
▶ Additional feature set: Monitoring, Code Tracing, Job
Queue, Page Caching, etc
▶ Cluster Manager
▶ Session Clustering
▶ High availability
▶ Scalable architecture
▶ Software updates and security hot fixes


Performance improvement
of Magento using
Zend Server


Getting better performance from Magento

● Magento optimization
▶ Magento Native Cache
▶ Magento Compilation Module
● Running Magento on Zend Server
▶ PHP opcode accelerator (Zend Optimizer+)
▶ Zend Server Data Cache
▶ Zend Server Page Caching
▶ Diagnosing performance problems


Magento native cache

● Magento uses Zend_Cache (Zend Framework
class) for data caching
● Supported backends modules:
●

▶ File ▶ memcached
▶ APC ▶ Zend Server
▶ eAccelerator ▶ etc
● File system backend (default)
● Cache backend model specified in
app/etc/local.xml
● Cache configuration examples can be found in
app/etc/local.xml.additional


Major cached entities

● Configuration
● Page Layouts
● HTML Blocks (top navigation, footer, etc)
● Translations
● Data collections (website collection, store collection,
store view collection, etc)


Magento compilation module

● Goal: decrease number of file system operations (I/O)
● By default Magento uses 4 additional directories in
include_path in the following order:
▶ app/code/local
▶ app/code/community
▶ app/code/core
▶ lib
● This schema provides extensibility and flexibility and
allows to fully rewrite code of some classes but yet
keeps upgradability


Magento compilation module: process

● Copy all the php files to the 4 dirs into one folder
(include/src) and declare one directory for include_path.
This step give 10-25% improvemente in performance.
● Aggregate code of most used php classes to “scope
include” files.
▶ For instance Varien_Object, Mage_Core_Model_Abstract,
Zend_Cache are included in every request. The classes
are aggregated to the “default scope include” file.

● Note: compilation needs to be disabled when
upgrading or developing and should be enabled in
production


Zend Optimizer+: PHP opcode accelerator

● Caching compiled PHP opcode in
shared memory
● Automatically enabled when you run
PHP applications using Zend Server
● Usually provide a very significant
performance boost


Zend Server Page Caching

● Caches entire HTTP response
● The rule caching is based on different parameters:
URL, $_SESSION, $_SERVER, $_GET, $_COOKIE
● Performance gains are usually very high
● Typically doesn't require code changes


Example: cache /js/index.php


Real use case: Zend's online store


Diagnosing performance problems

● Bult-in application monitoring alerts
on script execution slowdowns
● Problem diagnostics enables quick
problem isolation
● Code-level profiling and analysis
performed with:
▶ Code Tracing
▶ Integration with Zend Studio


Zend Server Cluster Manager



● Zend Server Cluster Manager extends
the benefits of Zend Server across
large-scale PHP deployments
● With Zend Server Cluster Manager you
can implement solutions of:
▶ High Availability
▶ Scalability
▶ Central management


Zend Server Cluster Manager architecture

Load Balancer Firewall

MySQL


High availability: session cluster


High availability: session cluster (2)


High availability and
Scalability
of Magento using


Magento session handlers
● Magento supports different PHP session handlers:
▶ file
▶ eaccelerator
▶ memcached
▶ db
● Right now, the version 1.4 of Magento doesn't support
the session clustering of Zend Server but there is a
patch to enable the session cluster:
http://arr.gr/magento/magento-1.4-trunk-r69862-issue-23361-01.patch

● This patch will be included in the future version of
Magento


The patch

● Edit the file app/code/core/Mage/Core/Model/Session/
Abstract/Varien.php
● Add the following lines (with +):
▶ @@ -59,6 +59,11 @@

case 'eaccelerator':
ini_set('session.save_handler', 'eaccelerator');
break;
+
+ case 'cluster':
+ ini_set('session.save_handler', 'cluster');
+ break;
+
default:
session_module_name('files');
if (is_writable(Mage::getBaseDir('session'))) {


High Availability and Scalability for Magento

● Using Zend Server Cluster Manager you can implement
an high availability and scalability architecture for
Magento
● For a Magento ecommerce web sites the advantages
using Zend Server Cluster Manager are:
▶ High availability = Never loose customers
▶ Scalability = Increment the number of customers
▶ Central management = Better support to the customers


Questions?


Thank you!

More info:
http://www.zend.com
http://www.magentocommerce.com


Costruire un sito e-commerce in alta affidabilità con Magento e Zend Server Cluster Manager

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