? Memcached and Java

1. Start the Memcache
$memcached -d -m 512 127.0.0.1 -p 1121


2. Check Memcache by Telnet  
$ telnet localhost 11211
Trying ::1...
Connected to localhost.
Escape character is '^]'.
get customer
END
set customer 0 3600 10  
complexity
STORED
get customer
VALUE customer 0 10
complexity
END


quit


Out of the various Java Memcached clients, I prefer to use Dustin's Spymemcached client.


Complete Spymemcached list of JAVA api is available here.




Sample code on how to create a connection:

MemcachedClient c=new MemcachedClient(
                new InetSocketAddress("hostname", portNum));

        // Store a value (async) for one hour
        c.set("someKey", 3600, someObject);
        // Retrieve a value.
        Object myObject=c.get("someKey");

                               OR

// Get a memcached client connected to several servers
      // over the binary protocol
      MemcachedClient c = new MemcachedClient(new BinaryConnectionFactory(),
              AddrUtil.getAddresses("server1:11211 server2:11211"));

      // Try to get a value, for up to 5 seconds, and cancel if it
      // doesn't return
      Object myObj = null;
      Future

? Memcached in Ubuntu Server 10.04

Memcache is a very simple caching system that uses memory to store objects. As you may already know, memory is faster to read than hard drive. A site will take a lot less time to read a database result cached in memory. To make the best use of memcache, you should install the memcached module. 


First, install the apache2, memcached package, php-pear , php5-dev and libmemcached-de


Install the following in the below order. 
sudo apt-get install memcached
sudo apt-get install php-pear
sudo apt-get install php5-dev
sudo apt-get install libmemcached-dev
sudo pecl install Memcache


and 
sudo echo "extension=memcache.so" >/etc/php5/apache2/conf.d/memcache.ini


Add the following line anywhere, to your php.ini file.
memcache.hash_strategy="consistent"


Start an instance of memcache daemon with the following command:
memcached -d -m 2048 -l 127.0.0.1 -p 11211


If you are only using a single server, then you only need to include this line to your site’s settings.php file.
$conf['cache_inc'] = '/sites/all/modules/memcache/memcache.inc';


The final step is to restart apache and then switch your site back online.

Following command helps to get the connection status :

 $netstat -na | grep 11211

? Install Apache2 in Ubuntu Server 10.04

Installation

The Apache2 web server is available in Ubuntu Linux. To install Apache2:

• At a terminal prompt enter the following command:
  

  sudo apt-get install apache2

? Enable FTP in ubuntu

FTP Server Installation

Vsftpd is an FTP daemon available in Ubuntu. It is easy to install, set up, and maintain. To install vsftpd you can run the following command:

sudo apt-get install vsftpd

To restart the daemon

sudo /etc/init.d/vsftpd restart