- Asymmetric load : load can be shared with the back-end dedicated server servers. This way, it improves performance on the front-end servers.

- Immediate Activation : In case of failure, the back-end server can immediately brought online.

- SSL Load Management : SSL connections can be managed through load balancing hardware.

- Protection against DDoS : SYN cookies and delayed binds. They can work offline and protects from DDoS counter attacks.

- Compression of HTTP : gzip on web browser to reduce load on the data transfer.

- TCP Offloading / buffer : Every HTTP request has different TCP Connection. It can serve every client that reaches the sever and takes care of every task.

- Caching of HTTP : It can store the data that are static, it reduces the load on the dedicated web server and does not need to retrieve the data everytime.

- Filtering : Traffic management and filtering.

- Security on HTTP : It can hide HTTP error page, remove HTTP response and cookie encryptions in order to maintain high security on servers.

- Priority Que : Differentiating between decent traffic and bad traffic.

- Request Switch : Requests can be sent to different load balancing servers as per URL that is requested.

- Authentication from client : Authentication for clients to access the website.

- Firewall : Un-secured connection to the load balancing servers are prevented and not allowed. This ensures security on the dedicated server.

Load-balancing dedicated servers with affordable prices are the best solutions to remain online always!

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BODHost understands every requirements of a client and provides them with reliable load balancing dedicated server solutions. load balancing servers improves performance on a dedicated server by managing and distributing load among servers. for example, application server and database server. It means application will run from the application server and the database will be retreived from the database server. This reduces the load on one server and distributes it between two dedicated server configurations.

Bandwidth and traffic management on load balancers are also taken care of. Fail-over dedicated server hosting setup and management are all part of BODHost dedicated server management technique program. We also run dedicated server monitoring technqiues that runs through the servers to check if the servers are functioning appropriately.

At BODHost, we understand that how important your business is and make sure everything is running smooth. If you have any questions in respect with load balancing dedicated server hosting setup configurations, please feel free to email our sales department or dedicated server department through http://support.bodhost.com/

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Applications and softwares required to setup LAMP clusters are packaged along with linux distributions. Following is an example where two servers run DNS which is the primary server and backup. This is ditributes between 3 web servers and 2 database servers.

The initial stage includes round-robin where DNS is a load-balancing solution which serves web requests for a hostname from different dedicated web servers. In this case, each web server has it’s own Public IP address.

Following is an example where the domain assignd the same hostname to each of three dedicated web servers but the IP addresses are completely different :

;
; Domain database for foo.com
;
domain.com. IN SOA ns1.domain.com. hostmaster.domain.com. (
2006032801 ; serial
10800 ; refresh
3600 ; retry
86400 ; expire
86400 ; default_ttl
)
;
; Name servers
;
domain.com. IN NS ns1.domain.com.
domain.com. IN NS ns2.domain.com.
;
; Web servers
;
www IN A 10.10.10.11
www IN A 10.10.10.12
www IN A 10.10.10.13

In DNS Server received requests from domain.com, one IP address will return for the first time, then a different IP address for the next request. In this case, Web server traffic is distributed among 3 web servers. However, due to DNS cache, resources may vary. This is just an solution to minimize load-balancing setup cost.

Web Server Configurations that is used in a cluster is the same as Apache Web Server Configuration with only one statement that content is the same with sycnhronization. Many use the option which is known as “rsync”.

We suggest you also create a new user account on each dedicated web server and it needs to have write permissions for Web content directory on each web server. Also, create SSH keys for the account and distribue the public keys to /home/syncer/.ssh directory on other 2 web servers. It also allows login without password to the user account and update data at each intervals.

The following rsync updates web content :

#!/bin/bash
rsync -r -a -v -e “ssh -l syncer” –delete /var/www/ webtwo:/var/www/
rsync -r -a -v -e “ssh -l syncer” –delete /var/www/ webthree:/var/www/

When a LAMP Cluster is setup, cookies needs to be checked as Apache stored cookies in /tmp directory. In case, a visitor views a session on Web Servers and if HTTP requests are managed by a different web server, the cookie won’t exist and it won’t function as required. Solution to this is shared cookie directory on Web Servers and should be done before setting up LAMP Clusters.

Another requirement of the setup is to send the data to the database master server and should be distributed between master and slave server.

Now, if we focus on Database servers, MySQL has a feature to maintain database on different servers. It is known as “log replay” which means a log is created on the master server which is read by a slave server and then applied to the database.

In this example, we will assign 2 database servers, one is Database Server 1 and Database Server 2.

In order to setup Master database server, you will need to create a replication account which is the user ID in MySQL which is utilized by slave servers which read the logs.

Following is an example :

GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO copyslave@”10.10.10.0/255.255.255.0″ IDENTIFIED BY ‘copypass’;

You can also edit MySQL configuration which is located in /etc/my.cnf and then add the following :

# Replication Master Server (default)
# binary logging is required for replication
log-bin ( binary log file – required for applications )

# required unique id
server-id = 1 ( Master Server )

You can view new binary log file in MySQL directory with $HOSTNAME-bin.001. Here, MySQL will create new log files. In order to setup Slave Server, edit /etc/my.cnf and add the following :

# required unique id
server-id = 2
#
# The replication master for this slave – required
# (Master Database Web Server IP)
master-host = 10.1.1.21
#
# Slave Username
# to the master – required
master-user = copy

# Slave Password
# the master – required
master-password = copypass

# Lost Connection Check
master-connect-retry = 15

# binary logs
log-bin

Restart MySQL, slave server will connect to the master server and begin the replication process. At initial stage, it will create master.info file with all settings in the default directory which is /var/lib/mysql

In order to check if the replication is working, log in to the MySQL monitor and run show master status and then show slave status. There you need to check Slave_IO_Running and Slave_MySQL_Running. If both are Yes, then the replication process is working.

In case, the database web server loosed network connectivity, you can stop MySQL on the master as well as slave server, then dump master database and reload the database on the slave server and then start MySQL on master and slave server.

If there are any issues with the master database server, the slave database server can be configured as master database server by simply updating the IP address and MySQL configuration file. It is possible to easily setup LAMP cluster on dedicated web server hosting

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There are many types of dedicated server hosting packages and as per client’s requirements, each dedicated server should be setup accordingly.

1) Basic Dedicated Server Hosting

If a client has outgrown from a shared / reseller / vps hosting account, he eventually upgrades to a dedicated server with his basic requirements. Client’s do not require much RAM, Hard Disk and basic Operating System installed on the dedicated server hosting package. Their main aim is to improve the website response time.

2) High-end Dedicated Server Hosting

This is probably the next stage of a basic dedicated server hosting package where a client is looking for more performance of the server as he has understood that his requirements are on a rise now which is then followed by a Quad Core Configuration. However, different client’s have different requirements and setup of the dedicated servers as per their selection is important. Infact, at times there are many pre-requisites that a web server hosting company should take care of.

3) Bandwidth Dedicated Server Hosting

If a client needs to run live video streaming website such as you-tube. He will not only need a high-end server configuration, but also good amount bandwidth which ranges from basic standard metered bandwidth per month to unmetered bandwidth of 100Mbps or 1Gbps Unmetered Bandwidth. The requirement of Data Transfer is high on these kind of websites and it should be able to download or upload on the server as fast as possible.

4) Application Dedicated Server Hosting

Dedicated Server Hosting packages that are utilized to host Applications are known as Application Dedicated Web Servers. Client’s host all kinds of legal applications such as live chat softwares, Flash tutorials, Media file installations and many more.

5) Database Dedicated Server Hosting

Client’s who run Databases such as MySQL or MS SQL on a dedicated server are known as Database Dedicated Server Hosting. These require more of storage space and higher-end server configurations in order to completely manage dedicated servers.

6) Server Mirroring Dedicated Server Hosting

Many client’s require their data mirrored to another server. This is because they do not like to loose any data at any point of time. Servers are synchronized in order to transfer data from one server to the another. RAID Configurations are setup on the same theme as dedicated Server mirroring. The only main difference is that RAID mirrors / strips on Hard Disks and Server Mirroring is Server concept.

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