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From: Apache Wiki <wikidiffs@apache.org>
To: Apache Wiki <wikidiffs@apache.org>
Date: Sun, 28 Mar 2010 14:56:52 -0000
Message-ID: <20100328145652.8465.60514@eos.apache.org>
Subject: 
 =?utf-8?q?=5BTomcat_Wiki=5D_Update_of_=22FAQ/Connectors=22_by_KonstantinK?=
 =?utf-8?q?olinko?=

Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Tomcat Wiki" for ch=
ange notification.

The "FAQ/Connectors" page has been changed by KonstantinKolinko.
The comment on this change is: Added a link.
http://wiki.apache.org/tomcat/FAQ/Connectors?action=3Ddiff&rev1=3D11&rev2=
=3D12

--------------------------------------------------

   1. [[#Q6|How do I bind to a specific ip address?]]
   1. [[#Q7|Where can I download a binary distribution of my connector?]]
   1. [[#Q8|I'm having strange UTF-8 issues with my request parameters.]]
+  1. [[#Q9|How do I configure apache tomcat connectors for a heavy load si=
te?]]
  =

  =3D=3D Answers =3D=3D
  =

  <<Anchor(Q1)>>'''What is JK (or AJP)?'''
  =

  AJP is a wire protocol. It an optimized version of the HTTP protocol to a=
llow a standalone web server such as [[http://httpd.apache.org/|Apache]] to=
 talk to Tomcat. Historically, Apache has been much faster than Tomcat at s=
erving static content. The idea is to let Apache serve the static content w=
hen possible, but proxy the request to Tomcat for Tomcat related content.
+ =

+ =

+ <<BR>>
  =

  <<Anchor(Q2)>>'''Which connector: mod_jserv, JK, JK2, mod_webapp or mod_p=
roxy?'''
  =

@@ -30, +34 @@

   * '''mod_jk is great and should be used for production'''. It is still u=
nder active development and also works for the apache 2.X series for cases =
where you do not want to use mod_proxy_ajp.
   * mod_proxy. A cheap way to proxy without the hassles of configuring JK.=
 This solution lacks sticky session load balancing. If you don't need some =
of the features of jk - this is a very simple alternative.
   * mod_proxy_ajp. With apache 2.2, mod_proxy was rewritten to support loa=
d balancing as well as a new transport called mod_proxy_ajp. This module is=
 distributed with the Apache http server, not the Tomcat server.
+ =

+ =

+ <<BR>>
  =

  <<Anchor(Q3)>>'''Why should I integrate Apache with Tomcat? (or not)'''
  =

@@ -43, +50 @@

   * Speed. Apache is faster at serving static content than Tomcat. But unl=
ess you have a high traffic site, this point is useless. But in some scenar=
ios, tomcat can be faster than Apache httpd. So benchmark YOUR site. '''Tom=
cat can perform at httpd speeds when using the proper connector (APR with s=
endFile enabled). Speed should not be considered a factor when choosing bet=
ween Apache httpd and Tomcat'''
   * Socket handling/system stability. Apache has better socket handling wi=
th respect to error conditions than Tomcat. The main reason is Tomcat must =
perform all its socket handling via the JVM which needs to be cross platfor=
m. The problem is socket optimization is a platform specific ordeal. Most o=
f the time the java code is fine, but when you are also bombarded with drop=
ped connections, invalid packets, invalid requests from invalid IP's, Apach=
e does a better job at dropping these error conditions than JVM based progr=
am. (YMMV)
  =

+ =

+ <<BR>>
+ =

  <<Anchor(Q4)>>'''At boot, is order of start up (Apache vs Tomcat) importa=
nt?'''
  =

  No. This way - either apache or tomcat can be restarted at any time indep=
endent of one another.
+ =

+ =

+ <<BR>>
  =

  <<Anchor(Q5)>>'''Is there any way to control the content of automatically=
 generated mod_jk.conf-auto? I need my own specific commands added to it.'''
  =

  There really is no need to. Just copy the automatically generated mod_jk.=
conf-auto and edit it manually to your preference. None of production tomca=
t installations really use mod_jk.conf-auto as it is. =

  =

+ =

+ <<BR>>
+ =

  <<Anchor(Q6)>>'''How do I bind to a specific ip address?'''
  =

- Each Connector element allows an `address` property. See the [[http://tom=
cat.apache.org/tomcat-6.0-doc/config/http.html|HTTP Connector docs]] or the=
 see the [[http://tomcat.apache.org/tomcat-6.0-doc/config/ajp.html|AJP Conn=
ector docs]].
+ Each Connector element allows an `address` property. See the [[http://tom=
cat.apache.org/tomcat-6.0-doc/config/http.html|HTTP Connector docs]] or the=
 [[http://tomcat.apache.org/tomcat-6.0-doc/config/ajp.html|AJP Connector do=
cs]].
+ =

+ =

+ <<BR>>
  =

  <<Anchor(Q7)>>'''Where can I download a binary distribution of my connect=
or?'''
  =

  You cannot: you need to download the source and compile it for your platf=
orm. The source distributions are available from the [[http://tomcat.apache=
.org/download-connectors.cgi|standard location]]. Note that JPackage.org ha=
s RPM distributions for the connectors as well as tomcat itself: [[http://w=
ww.jpackage.org/|JPackage.org]]
  =

+ =

+ <<BR>>
+ =

  <<Anchor(Q8)>>'''I'm having strange UTF-8 issues with my request paramete=
rs.'''
  =

- See [[FAQ/CharacterEncoding|Character Encoding]]
+ See [[../CharacterEncoding|Character Encoding]]
+ =

+ =

+ <<BR>>
+ =

+ <<Anchor(Q9)>>'''How do I configure apache tomcat connectors for a heavy =
load site?'''
+ =

+ See [[../Performance_and_Monitoring|Performance and Monitoring]]
  =

  ----
  [[CategoryFAQ|CategoryFAQ]]

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