ITCamp 2011 - Alessandro Pilotti - Optimizing ASPNet and PHP apps on IIS 7.5

Optimizing ASP.Net and PHP
Web Applications on IIS 7.5
Alessandro Pilotti
info@cloudbasesolutions.com
MVP / IIS

MCSD (VS 6.0 & .Net), MCAD, MCSE, MCDBA,
MCT, RHCE, SCJP2

Premium conference on Microsoft’s Dev and ITPro technologies @itcampro / #itcampro

IT Camp 2011
• Thanks for coming!
• ITCamp is made possible by our sponsors:


Session agenda
• IIS 7.5 Architecture
• WebPI
• FastCGI
• Wincache Extensions for PHP
• Output Caching
• Application Request Routing
• AppFabric Caching
• Session management in PHP & SQL Server


Architecture - IIS 6
Web Request • Monolithic
Authentication • Extension via
NTLM Basic Anon ISAPI ony
…
CGI
Determine Static
Handler File
ASP.NET
ISAPI
…
PHP
Send Response
Log Compress


Architecture IIS 7.5
Web Request • Features separated in
NTLM
Basic
modules
Authentication
Anon – More than 40
Authorization
… • Modules fit in a
ResolveCache CGI
…
common pipeline
Static
File • Modules employ
Determine Handler
ISAPI common API
…
UpdateCache • Managed or
Compress
unmanaged
Send Response Log


Anatomy of a Request in IIS 7.x
• HTTP .sys
receives the
request
• WAS
• applicationHost
.config
• WWW service
• HTTP .sys config
• W3WP
• WP execution
• Response


Request – W3WP details


WAS and W3SVC


versioning
• IIS 5.0
– Windows 2000
• IIS 5.1
– Windows XP
• IIS 6.0
– Windows Server 2003
• IIS 7.0
– Windows Vista / Server 2008
• IIS 7.5
– Window 7 / Server 2008 R2


Web Platform Installer 3
• Single tool to easily deploy:
– Frameworks
– Extensions
– Tools
– Applications
• E.g.: DNN, Joomla, etc
• Always updated


WEB PI 3


Web PI 3


Web Platform Installer

DEMO


FastCGI 1.5
• Very popular in the Apache environment, for PHP Perl,
,
Ruby, etc
• CGI is slow: every request generates a process instance!
• FastCGI employs the same process for many requests
• Supported on IIS 7.x and IIS 6.0 (the latter via fcgiext.dll
ISAPI)
• Written in collaboration with Zend (PHP) but is generic
• In IIS 7.x: Enable CGI among the IIS role services
• Note: Install Hotfix KB980363 on IIS 7.0 to get version
1.5!

FastCGI Setup


FastCGI – version differences

Feature 5.1/6.0 7.0 7.5
Monitoring file changes Yes Yes Yes
Real-Time max Inst. tuning Yes Yes Yes
STDERR support Yes Yes Yes
SIGTERM support Yes Yes Yes
Env. variable _FCGI_X_PIPE_ Yes Yes Yes
Proc. Pool per application Yes Yes Yes
UTF-8 variable encoding Yes Yes No
IIS CPU Limit support No Yes Yes


FastCGI - PHP
• Install PHP 5.2 or 5.3
– During setup choose FastCGI
• As an alternative, deploy via WebPI
• WP3P.exe
– Loads iisfcgi.dll
– Executes php-cgi.exe
• Config: PHP.INI
– E.g.: fastcgi.impersonate = 1


PHP on IIS – other options
• ISAPI
– Previous choice
– Low reliability due to reentrance problems
– DLL loaded at W3SVC instance level
• Security issues!!
• CGI (not FastCGI!)
– Awful performance


PHP on IIS - Performance
• PHP gets compiled at runtime
– Reads source file and generates
bytecode
– Process repeated at each request
• Not a problem for small loads
• Huge bottleneck otherwise
– Various solutions available
– Now (PHP 5.x) no one available natively


PHP Accelerators
• Tools whose purpose is to improve
the PHP execution time
• Most popular available:
– APC (default on PHP 6.0)
– eAccelerator
– Zend Server
– Windows Cache Extension for PHP


WinCache for PHP
• Open source project developed by
Microsoft
• IIS Specific
• Requires PHP 5.2 or 5.3 x86
– Non thread safe version
• Provides features not available in
APC and other accelerators


WinCache for PHP
• Setup
– Web Platform Installer
– Direct download
– Source code
• PHP configuration
.ini
– extension = php_wincache.dll
– Verify setup with phpinfo()
– maxInstances = 0 for best performance!


WinCache for PHP
• PHP Bytecode Cache
– Subsequest calls to a script employ precompiled and
cached bytecode
• PHP scripts loaded in memory
– Reduced I/O, mainly for UNC Paths!
• Cache handled via Shared Memory
• Absolute path caching
– Optimizes the time required to resolve relative paths
• Cache based session handler
– By default PHP uses a file system based solution

WinCache for PHP
• User cache
– wincache_ucache_set(key, value)
– wincache_ucache_get(key)
– Etc
• User Cache session handler
– session.save_handler = wincache


FastCGI / PHP / WinCache

DEMO


IIS 7.x Output Caching
• Very efficient way to optimize an
application
• There 2 type of contents
– Static
– Dynamic
• Based on a degree of dynamism and determinism
–


• IIS provides two caching policies
– User mode (IIS 7.x worker process)
– Kernel mode
• Cache in HTTP.sys memory
• Faster!
• Parameter based (header, QueryString)
• Not to be confused with ASP.Net output
caching!


Kernel Caching - limits
• No user mode modules or features
– E.g. Authentication
• varyByQueryString parameter not
supported
• Management:
– netsh http show cache
– Netsh http delete cache …


• Caching can be enabled for static and
“semi-dynamic” content

• Caching enabled for each site
– Via UI
– Via Command Line (appcmd)


Caching Rules
• IIS decides if “it is worth” to cache some
content
• Parameters
– frequentHitTimePeriod
• Default 10s
– frequentHitThreshold
• Default 2
• ServerRuntime in applicationHost.config


ServiceRuntime sample
<system.webServer>
<serverRuntime enabled="true"
frequentHitThreshold="5"
frequentHitTimePeriod="00:00:20" />
</system.webServer>


Output Caching

DEMO


Application Request Routing (ARR)
2.5
• Based on the URL Rewrite module
• Enhances Availability and scalability
• Load balancing
• Health monitoring
• Client Affinity
• Works at level 5 ISO/OSI
– Can work with a NLB (level 3) solution
• ARR 2 introduces a caching option


Load balancing


Creating a Web Farm


Server farm config


Application Request Routing

DEMO


AppFabric
• Extension with two separated main
areas
– WCF and WF service housing
MSDN video (in Italian  )
http://www.microsoft.com/italy/beit/Generic.aspx?
video=1a5e02e4-c881-4ef9-ac86-61dd7a370f70
– Distributed Cache
• Solution to increase scalability and
performance


AppFabric Cache - Scalability
• The problem:
– Increasing load, means distributing it on
more hosts
– ARR is not a data oriented tool
– The cache works at a data level
• Other advantages:
– Works also as a session provider
– It can be integrated in EF as a 2nd level cache


AppFabric Cache Architecture


AppFabric Setup


AppFabric Cache Cluster
• Fault tolerant solution
• Every host keeps a replicated copy of the
data
• Doesn’t require Windows Clustering
• Configuration based on the “leadHost”
concept
– Host delegated to “master” the cluster
configuration


AppFabric Cache Cluster
• Configuration can be kept on:
– SQL Server
• LeadHost not required
– Shared storage + XML file
• LeadHost required
– Custom provider
• LeadHost can be redundant
• Note: SQL / storage can become a single point
of failure! (valutare cluster etc)


AppFabric Cache TCP/IP
• Replication: 22236
• Arbitration: 22235
• Cluster: 22234
• Cache: 22233


AppFabric Cache Client
• Any .Net 3.5 o 4.0
• Install the “Cache Client” feature only
• In Visual Studio, register:
– Microsoft.ApplicationServer.Caching.Client
– Microsoft.ApplicationServer.Caching.Core

• Assembly available in
– %systemroot%System32AppFabric
• Sostituire con SysWOW64 se x86 su x64


AppFabric Cache client session
• Enabling AppCache as a session provider
in web.config

<sessionState mode="Custom" customProvider="AppFabricCacheSessionStoreProvider”>
<providers>
<add name="AppFabricCacheSessionStoreProvider”
type="Microsoft.ApplicationServer.Caching.DataCacheSessionStoreProvider,
Microsoft.ApplicationServer.Caching.Client, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35”
cacheName="TestWPC” sharedId="DemoApp1"/>
</providers>
</sessionState>


PowerShell
• Start-CacheCluster
• New-Cache
• Grant-CacheClientAllowedAccount
• Get-Cache
• Get-CacheStatistics


Concurrency models
• Optimistic
– Versioning
– Version number checked during a Put
operation
• Pessimistic
– Lock
– Watchout for performance issues…
– Note: Put doesn’t check for locks!


AppFabric Cache

DEMO


PHP + MSSQL Sessions
• Scaling out an application on a web farm
requires proper session management
• Tipically offloaded to a database or a
state server
• ASP .Net offers ready made solutions
• PHP can be extended implementing a
small number of documented callbacks


PHP + MSSQL Sessions
• SQL Server Drivers for PHP 1.1
– Installable also via WebPI (recommended)
• In PHP.ini
– extension=php_pdo_sqlsrv.dll
– session.save_handler = user
• PHP handler to implement:
– session_set_save_handler


PHP + MS SQL Server Session handling

DEMO


Q&A


Don’t forget!
Get your free Azure pass! We want your feedback!

• 30+15 days, no CC req’d • Win a WP7 smartphone
– http://bit.ly/ITCAMP11 – Fill in your feedback forms
– Promo code: ITCAMP11 – Raffle: end of the day


ITCamp 2011 - Alessandro Pilotti - Optimizing ASPNet and PHP apps on IIS 7.5

Empfohlen

Empfohlen

Weitere ähnliche Inhalte

Was ist angesagt?

Was ist angesagt? (20)

Andere mochten auch

Andere mochten auch (8)

Ähnlich wie ITCamp 2011 - Alessandro Pilotti - Optimizing ASPNet and PHP apps on IIS 7.5

Ähnlich wie ITCamp 2011 - Alessandro Pilotti - Optimizing ASPNet and PHP apps on IIS 7.5 (20)

Mehr von ITCamp

Mehr von ITCamp (20)

Kürzlich hochgeladen

Kürzlich hochgeladen (20)

ITCamp 2011 - Alessandro Pilotti - Optimizing ASPNet and PHP apps on IIS 7.5