JMeter is to first download the latest production release and install it. The release contains all of the files you need to build and run most types of tests, e.g. Web (HTTP/HTTPS), FTP, JDBC, LDAP, Java, and JUnit.

If you want to perform JDBC testing, then you will, of course, need the appropriate JDBC driver from your vendor. JMeter does not come with any JDBC drivers.

If you want to install the jmeter on your linux box you need to follow my steps

1) Goto http://jakarta.apache.org/site/downloads/downloads_jmeter.cgi
2) Download Binary 2.3.4.zip . The zip file name will be “jakarta-jmeter-2.3.4″
3) Paste it in /var/www/html/
4) Unzip “jakarta-jmeter-2.3.4″
5) New folder with name “jakarta-jmeter-2.3.4″ will be created
6) Go to command prompt
7) go to “jakarta-jmeter-2.3.4″ folder (cd /var/www/html/jakarta-jmeter-2.3.4)
go to “bin” folder (cd bin)
9) Now you are in bin folder (i.e /var/www/html/jakarta-jmeter-2.3.4/bin/)
10) type the command “sh jmeter”
11) After a short pause, the JMeter GUI should appear.

After this you can use following commands for load testing.

For non-interactive testing, you may choose to run JMeter without the GUI. To do so, use the following command options

-n This specifies JMeter is to run in non-gui mode

-t [name of JMX file that contains the Test Plan].

-l [name of JTL file to log sample results to].

-r Run the test in the servers specified by the JMeter property “remote_hosts”

-R [list of remote servers] Run the test in the specified remote servers

The script also lets you specify the optional firewall/proxy server information:

-H [proxy server hostname or ip address]
-P [proxy server port]

Example : jmeter -n -t my_test.jmx -l log.jtl -H my.proxy.server -P 8000

I specially dont like to put www in URL so we can easily remove the www from URL.

Open your apache configuration file. If you are using Linux then open file from following location

# vim /etc/httpd/conf/httpd.conf

put following lines in your virtual directory section.

# remove www from url
RewriteCond %{HTTP_HOST} ^www\.example\.com$ [NC]
RewriteRule ^.*$ http://example.com%{REQUEST_URI} [R=301,L]

We can use this rewrite rule in .htaccess file also. But make sure .htaccess is enable through apache server.

# remove the www from URL.
Options +FollowSymlinks
RewriteEngine On
RewriteCond %{HTTP_HOST} ^www\.example\.com$ [NC]
RewriteRule ^.*$ http://example.com%{REQUEST_URI} [R=301s,L]

For WordPress websites for seo purpose putting above lines in .htaccess file is really best. That will gives you the really great result in future.

In this article I am going to write about in detail about cloud hosting. We are heard about messaging servers and big web services.

Twitter is the biggest mirco blogging website in the world and they are running like more then 100 mongrel server instances on Nginx server for handling the twitter. But still they are facing lot of traffic issue. May be there are multiple reasons. But still one of that is Rails. How much requests single mongrel instance can handle and if they got billions of hits in single second. What will happen we never no.

Who are in server administration they will defiantly have good idea about these issues.

What is cloud hosting?

Cloud hosting is nothing but multiple virtual machines which are basically does load balancing.

Generally, website hosted on a cloud hosting operates on a clustered servers where online operations are not limited to a single server. By handling security, load balance and hardware resources virtually, the website has access to the processing power of a number of servers that are distributed in real time.

Cloud computing is a way of computing, via the Internet, that broadly shares computer resources instead of having a local personal computer handle specific applications.

I can say Cloud hosting is solution for multiple dedicated servers. Handling multiple dedicated server is really pain. So for high traffic websites choosing the cloud hosting is the best option.

Google, Yahoo, MSN, Facebook many companies are already using the cloud hosting for better performance.

For choosing the cloud hosting there are few good options present in market. Some of few as follows:

1. Amazon

2. gogrid

If you are using the shared hosting then please go with only .htaccess file.

Just copy paste following code in .htaccess file.

<IfModule mod_rewrite.c>

Options +FollowSymlinks

RewriteEngine On

RewriteBase /

RewriteCond %{HTTP_HOST} !^www\.wordpressapi\.com$ [NC]

RewriteRule ^(.*)$ http://www.wordpressapi.com/$1 [L,R=301]

</IfModule>

http://activemq.apache.org/activemq-530-release.html

Choose the your OS(Linux/Windows). After downloading apache-activemq-5.3.0-bin.zip.
Extract the ActiveMQ. Open command prompt and go to activeMQ/bin directory and run the “activemq” command.

ActiveMQ will start without configration.
If you are running ActiveMQ on local machine than you can open the ActiveMQ’s Admin from following URL;
http://0.0.0.0:8161/admin/ (8161 is default port)

If you want to run ActiveMQ with XML file. Use following command
#bin/activemq xbean:file:../config.xml

For more information Please visit the http://activemq.apache.org/

This will start apache server.
[root@localhost siwan]# /etc/init.d/httpd restart

Locate the file “Hosts” on your computer:
Windows
Windows 95/98/Me c:\windows\hosts
Windows NT/2000/XP Pro c:\winnt\system32\drivers\etc\hosts
Windows XP Home c:\windows\system32\drivers\etc\hosts

Linux
/etc/hosts or /etc/host.conf or /etc/nsswitch.conf

Symbian
C:\system\data\hosts

Mac OS
/private/etc/hosts or /etc/hosts

In that file you can edit entry like this

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost localhost yourlocaldomain.com , example.com
::1 localhost6.localdomain6 localhost6
192.168.2.200 intranet

directory.example.com 71.155.186.91

You are able to start your applicaton at http://127.0.0.1:3000, http://127.0.0.1:3001 and http://127.0.0.1:3002

for all the cluster
# mongrel_rails cluster::stop

Advanced prepairation for production realeaze
$ mkdir /etc/mongrel_cluster

#vim /etc/mongrel_cluster/project_name.yml
copy and paste following text;
user: project_name
cwd: //home/siwan/project_name
log_file: /home/siwan/project_name/mongrel.log
port: “3000″
environment: production
group: dev
address: localhost
pid_file: /home/siwan/project_name/tmp/pids/mongrel.pid
servers: 3

or you can run the following command

or copy and paste the content from config/mongrel_cluster.yml file to /etc/mongrel_cluster/project_name.yml

# ln -s /home/siwan/project_name/config/mongrel_cluster.yml /etc/mongrel_cluster/project_name.yml

Then open your httpd.conf file for apache configration:

<Proxy balancer://project_name>
BalancerMember http://127.0.0.1:3000
BalancerMember http://127.0.0.1:3001
BalancerMember http://127.0.0.1:3002
</Proxy>

<VirtualHost *:80>
ProxyPreserveHost On
# Avoid open you server to proxying
ProxyRequests Off
# Options +FollowSymLinks
RewriteEngine On

RewriteRule ^/(images|stylesheet|javascript|html)/?(.*) /home/siwan/project_name/public/$0 [L]
ServerAdmin siwan@yahoo.co.in
DocumentRoot /home/project_name/
ServerName example.com
RewriteRule  ^/(.*)$  balancer://project_name%{REQUEST_URI} [P,QSA,L]
</VirtualHost>

Restart the apache server
#/etc/init.d/httpd restart

Command for restart the mongrel servers from any where
# mongrel_rails cluster::restart -C /etc/mongrel_cluster/project_name.yml

I did not get my default page opened in browser.
When I opened the apache error log file. I saw following error.

ModSecurity: Access denied with code 400 (phase 2). Pattern match “%0[ad]” at REQUEST_HEADERS:Cookie. [id "950910"] [msg "HTTP Response Splitting Attack. Matched signature <%0a>"] [severity "ALERT"] [hostname "localhost"] [uri "/"] [unique_id "SuWoGH8AAAEAAFF3rKEAAAAA"]

I after doing some R&D but I did not got any perfect soluction.
Then I cleared the whole browser cookies. That solves my problem.

solution – clear the browser cookies…

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, root@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

When I got above error I opened the error log file.

Error Log File log(#vim /var/log/httpd/error_log)
[Wed Oct 14 12:02:56 2009] [notice] mod_python: Creating 4 session mutexes based on 256 max processes and 0 max threads.
[Wed Oct 14 12:02:56 2009] [notice] mod_python: using mutex_directory /tmp
[Wed Oct 14 12:02:56 2009] [notice] Apache/2.2.9 (Unix) DAV/2 PHP/5.2.6 mod_python/3.3.1 Python/2.5.1 mod_ssl/2.2.9 OpenSSL/0.9.8g mod_perl/2.0.4 Perl/v5.10.0 configured — resuming normal operations
[Wed Oct 14 12:02:59 2009] [alert] [client 127.0.0.1] /var/www/html/your_domain_name/.htaccess: DirectoryIndex not allowed here, referer: http://your_domain_name.org/
[Wed Oct 14 12:03:29 2009] [alert] [client 127.0.0.1] /var/www/html/your_domain_name/.htaccess: DirectoryIndex not allowed here, referer: http://your_domain_name.org/
[Wed Oct 14 12:11:13 2009] [notice] caught SIGTERM, shutting down
[Wed Oct 14 12:11:13 2009] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Wed Oct 14 12:11:13 2009] [notice] Digest: generating secret for digest authentication …
[Wed Oct 14 12:11:13 2009] [notice] Digest: done

At the end of file I saw above error.

When I saw that I opened the httpd.conf file and I searched for line.

AllowOverride None

I commented this line.
#AllowOverride None

Then I added following lines to that tag
Order allow,deny
Allow from all

Then I saved the httpd.conf file and restarted the apache server.

This solved the my issue.

If you want to host many sites on one computer or machine.
I added following lines to httpd.conf file(end of file).

<VirtualHost  *:80>

Options +FollowSymLinks
ServerName example1.com
DocumentRoot /var/www/html/example1

</ VirtualHost>

<VirtualHost  *:80>

Options +FollowSymLinks
ServerName example2.com
DocumentRoot /var/www/html/example2

</ VirtualHost>

When I restarted the apache server using following command.
#su
#ROOT_PASSWORD
#/etc/init.d/httpd restart

I got the following error;
[warn] _default_ VirtualHost overlap on port 80, the first has precedence

Again I opend the httpd.conf tile and I read following lines;
#
# Use name-based virtual hosting.
#
#NameVirtualHost *:80

# NOTE: NameVirtualHost cannot be used without a port specifier
# (e.g. :80) if mod_ssl is being used, due to the nature of the
# SSL protocol.
#

Than only I uncommented following line and restarted the Server.

NameVirtualHost *:80

My promlem get solved.

When I inserted the following code in bottom of the httpd.conf file.
<VirtualHost *:80>
Options +FollowSymLinks
ServerAdmin siwan@yahoo.co.in
DocumentRoot /var/www/html/testfolder
ErrorLog logs/error_log_net
TransferLog logs/access_log_net
</VirtualHost>

When tried the http://localhost/ in browser, I got the default browser page.
Then I tried to look my apache error using following command:
#[root@localhost ]# tail -f /var/log/httpd/error_log

In apache error log I got following error.
[Wed Oct 07 15:59:50 2008] [error] [client 127.0.0.1] Directory index forbidden by Options directive: /var/www/html/testfolder/

I changed the AllowOverride option but nothing is happend. Then I read the welcome page text
“To prevent this page from ever being used, follow the instructions in the file /etc/httpd/conf.d/welcome.conf.”
I opend the welcome.conf file.

I found following lines in welcome.conf file.
<LocationMatch “^/+$”>
Options -Indexes
ErrorDocument 403 /error/noindex.html
</LocationMatch>

I changed that to as follows:

<LocationMatch “^/+$”>
Options Indexes
ErrorDocument 403 /error/noindex.html
</LocationMatch>

That solve my problem. Some time your selinux will cause the issue so you need to deactivate the selinux.
Some time File permission will also cause the issue.
You can change the file permission using following command, go to that directory and run following command.
#chmod 777 *

You can achive the Clean URLs. With not doing rework of building site.

Requirement:
Apache Server.
mod_rewrite engine need to on.

Create .htaccess file
and copy paste the following lines

Options +FollowSymLinks
RewriteEngine On

RewriteCond %{SCRIPT_FILENAME} !-d
RewriteCond %{SCRIPT_FILENAME} !-f

#code for About us Page
RewriteRule ^about-us(\d+)*$ ./about.html$1

Put this file into your root folder.

What this will do?

For example I want

www.example.com/about.html to look like www.example.com/about-us/

We are using Fedora as Operating System and Apache as webserver on our testing machine. We hosted more than fifteen test sites on that server.

I successfully created basic authentication on server.

Use following commands:

#su

#ROOT_PASSWORD

#vi /etc/httpd/conf/httpd.conf

in that file you need to insert following lines.

AccessFileName htaccess.acl .htaccess

# htpasswd -c /home/USER/pwd.txt USER(you can define your user of stystem.)

New password: mypassword
Re-type new password: mypassword

 

That sit. Your username and password is set for popup.

Now you need to only create or update your .htaccess  file. You can create or find .htaccess file in your project folder.

Use or copy and paste following code in that file: (.htaccess file)

AuthUserFile /home/USER/pwd.txt
AuthName "Protected"
AuthType Basic

<Limit GET POST>
require valid-user
</Limit>

I following exact method for my server and projects. It is working perfect for me.