caelum dicas web 2010

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Friday, April 16, 2010

AkitaOnRails.com


~ 50 min~ 85 slides


www.slideshare.net/akitaonrails

[email protected]

http://dl.dropbox.com/u/1732133/dicas-de-desenvolvimento-web-com-rails.zip


http://www.slideshare.net/akitaonrails






Entendendo a WebDicas sobre Desenvolvimento Web com Ruby

Fabio Akita


Recapitulando ...


Rails não Escala


Rails não Escala(TM)


Blaine Cook

http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter


http://www.computerworld.com.au/article/268003/ruby_rails_rolls_into_enterprise?fp=16&fpid=1


Para colocar as coisas em perspectiva, o Friendster foi

escrito em Java e eles mudaram para PHP. MySpace foi escrito

em ColdFusion e eles mudaram para ASP.NET.

Blaine Cook





Para colocar as coisas em perspectiva, o Friendster foi

escrito em Java e eles mudaram para PHP. MySpace foi escrito

em ColdFusion e eles mudaram para ASP.NET.

Blaine Cook


Quando as pessoas caem em problemas de escalabilidade, normalmente acham que a

linguagem é o problema, mas eu acho que isso raramente é a

realidade.





“O The New York Times usou Ruby on Rails para agregar, analizar e mostrar os resultados das

eleições em quase tempo real em um de seus sites mais acessados de todos os tempos.”




Web Server

MySQL

Browser


Web Server

MySQL

Browser

Varnish/HAProxy


Web Server

MySQL

Browser

Varnish/HAProxy

Memcached


Web Server

MySQL

Browser

Varnish/HAProxy

Memcached

CouchDB/MongoDB


Ruby é Lento


Ruby é Lento(TM)


Existem mentiras, mentiras malditas e

estatísticas.


x mais lento que C++


0 32.5 65 97.5 130

Python 2

Ruby 1.9

JRuby

Perl

Python 3

PHP

Ruby 1.8

x mais lento que C++


Homepage: 331 ms


Homepage: 331 ms

Total: 5.45 s


Performance!=

Escalabilidade


Exemplo


6Técnicas


Menos Requisições


Mini!que CSS e Javascript


Juicerhttp://github.com/cjohansen/juicer/


http://github.com/cjohansen/juicer/

http://github.com/cjohansen/juicer/

gem install juicer

script/plugin install git://github.com/ktheory/juicer-rails.git


juicer install yuicompressor

juicer install jslint

juicer install closure_compiler


<%= juiced_tag '/stylesheets/application.css' %> <%= yield(:head) %>

</head><body>

... <%= juiced_tag '/javascripts/application.js' %>

</body>

/app/views/layouts/application.html.erb


@import url("reset.css");@import url("base.css");@import url("fonts.css");

...

/* @depends jquery-1.4.min.js @depends jquery.edit_in_place.js @depends jqueryamail.js*/

...

/public/stylesheets/application.css

/public/javascripts/application.js


juicer merge public/stylesheets/application.css

public/stylesheets/application.min.css

juicer merge -i public/javascripts/application.js

public/javascripts/application.min.js


DEVELOPMENT


PRODUCTION


Asset HostsNavegadores abrem poucas conexões

simultâneas por domínio


def gallery gallery_path = File.join(Rails.root, "public/images/gallery/")

@images = Dir.glob(gallery_path + "*").map{ |f| f.gsub(gallery_path, "") }

end

/app/controllers/hello_controller.rb


def gallery gallery_path = File.join(Rails.root, "public/images/gallery/")

@images = Dir.glob(gallery_path + "*").map{ |f| f.gsub(gallery_path, "") }

end

/app/controllers/hello_controller.rb

/app/views/hello/gallery.html.erb

<% title "Gallery" %>

<% @images.each do |image| -%> <%= image_tag "gallery/#{image}" %>

<% end -%>


DEVELOPMENT


/con!g/environments/production.rb

config.action_controller.asset_host = Proc.new do |source, request| protocol = if request.ssl?

request.headers["USER_AGENT"] =~ /(Safari)/ ? "http" : "https" else

"http" end

"#{protocol}://asset#{rand(6) + 1}.akitaonrails.local:3000"end


### Host Database## localhost is used to configure the loopback interface# when the system is booting. Do not change this entry.##127.0.0.1 localhost255.255.255.255 broadcasthost::1 localhost fe80::1%lo0 localhost127.0.0.1 asset1.akitaonrails.local asset2.akitaonrails.local asset3.akitaonrails.local asset4.akitaonrails.local asset5.akitaonrails.local asset6.akitaonrails.local www.akitaonrails.local

/etc/hosts


PRODUCTION


Javascript embaixo!


<head> <title><%= h(yield(:title) || "Untitled") %></title> <%= stylesheet_link_tag 'application' %> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js" type="text/javascript"></script> <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.min.js" type="text/javascript"></script> <script src="http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js" type="text/javascript"></script> <script src="http://ajax.googleapis.com/ajax/libs/chrome-frame/1.0.2/CFInstall.min.js" type="text/javascript"></script> <%= yield(:head) %></head><body>...



... <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js" type="text/javascript"></script> <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.min.js" type="text/javascript"></script> <script src="http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js" type="text/javascript"></script> <script src="http://ajax.googleapis.com/ajax/libs/chrome-frame/1.0.2/CFInstall.min.js" type="text/javascript"></script> <script type="text/javascript"> // meu javascript customizado ... </script> </body></html>



Gzip


a2enmod de"ate

editar/etc/apache2/mods-available/de"ate.conf


<IfModule mod_deflate.c> AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/html AddOutputFilterByType DEFLATE text/xml AddOutputFilterByType DEFLATE text/css AddOutputFilterByType DEFLATE image/svg+xml AddOutputFilterByType DEFLATE image/x-icon AddOutputFilterByType DEFLATE application/xml AddOutputFilterByType DEFLATE application/xhtml+xml AddOutputFilterByType DEFLATE application/rss+xml AddOutputFilterByType DEFLATE application/javascript AddOutputFilterByType DEFLATE application/x-javascript

AddOutputFilterByType DEFLATE application/x-httpd-php AddOutputFilterByType DEFLATE application/x-httpd-fastphp AddOutputFilterByType DEFLATE application/x-httpd-eruby

DeflateCompressionLevel 9

# Netscape 4.X has some problems BrowserMatch ^Mozilla/4 gzip-only-text/html

# Netscape 4.06-4.08 have some more problems BrowserMatch ^Mozilla/4\.0[678] no-gzip

# MSIE masquerades as Netscape, but it is fine BrowserMatch \bMSIE !no-gzip !gzip-only-text/html</IfModule>

/etc/apache2/mods-available/de"ate.conf


Cabeçalhos de Expiração


a2enmod expires

editar/etc/apache2/mods-available/expires.conf


<IfModule mod_expires.c> ExpiresByType image/x-icon "access plus 1 year" ExpiresByType image/png "access plus 1 year" ExpiresByType image/jpg "access plus 1 year" ExpiresByType image/gif "access plus 1 year" ExpiresByType image/jpeg "access plus 1 year" ExpiresByType application/pdf "access plus 1 year" ExpiresByType audio/x-wav "access plus 1 year" ExpiresByType audio/mpeg "access plus 1 year" ExpiresByType video/mpeg "access plus 1 year" ExpiresByType video/mp4 "access plus 1 year" ExpiresByType video/quicktime "access plus 1 year" ExpiresByType video/x-ms-wmv "access plus 1 year" ExpiresByType application/x-shockwave-flash "access 1 month" ExpiresByType text/css "access plus 1 year" ExpiresByType text/javascript "access plus 1 year"</IfModule>

/etc/apache2/mods-available/expires.conf


Cache Busters


<%= stylesheet_link_tag 'application' %>

<%= javascript_include_tag 'application' %>

<%= image_tag "logo.png" %>



Use CDNs


Search


select * from ... where ... like “%...%”



or ... like “%...%”or ... like “%...%”or ... like “%...%”or ... like “%...%”


Open Source Enterprise Search Platform

Baseado no famoso Lucene

Full Text Search, com relevância

Indexa documentos (Word, PDF, etc)

Interface REST

Roda em containers de Servlet (Tomcat)



or ... like “%...%”or ... like “%...%”or ... like “%...%”or ... like “%...%”


Tarefas Assíncronas


Requisição


ProcessamentoRequisição


Resposta



Crontab


RMagick


RedisWorkers

Resque-Web



291 s


Resposta

Processamento

Requisição

32 s

Worker


Imagens

Relatórios

Web Services

Transações


Aprendendo Mais


RAILS LABS


RAILSCASTS.com


caelum.com.br


egenial.com.br


Entenda os browsers

Entenda HTTP

Arquiteturas

Mundo Assíncrono

Mundo não Relacional


Thx!www.slideshare.net/akitaonrails

[email protected]

http://dl.dropbox.com/u/1732133/dicas-de-desenvolvimento-web-com-rails.zip








caelum dicas web 2010

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