SQL Server Clusters are setup when requirements of applications or Databases are not met. This is a setup to ensure performance is maintained at all times. While setting up a Cluster, you need to make sure you have noticed the following facts :

- Applications usage and their response.
- Uptime is maintained at all times even when a e-commerce applications is taking place.
- Loss in case of application failure.
- Apllication setup need mainenance.
- Maintenance and upgrades take place without any application downtime.
- Additional maintenance and training cost.
- Unification of Applications and resources.
- Increase availability in failures or downtime.
- Enhance Scalibility.
- Share load accross multiple servers.
- Clusters are basic of two type : Asymmetric Clusters and Symmetric Clusters
- Asymmetric Clusters refers to server exists to take over another server in case of any failure. It is efficient for availability and scalability for databases, files and services. In case, one of the servers are down, the other server takes place of the first server node. One of the terms refers to failover cluster.
- Symmetric Clusters, in this every server performance the same task. In this case, every server is the main server for applications. In case, one of them fail, the remaining servers continue to process applications. When it comes to cost, cluster resources are used. However, the only problem with it is in case of failure, additional load on other server could fail them.
- Load Management with Server Clusters
- Avoid Interruption of Services
- Increase in Flexibility.
- Complex Infrastructure in more number of servers are not easy to manage.
- Code Changes to function with all the servers.
- Applicaton limitations are not supported on Server Clusters.

SQL Dedicated Server Clusters Solutions are designed to meet Corporate Requirements and manage heavy databases / applications. BODHost provides fully managed dedicated server clustering solutions. SQL Server are normally setup with Server clusters.
If you need any further information, please email us at sales @ bodhost.com and we will suggest the best cluster setup for your applications.

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PHP also includes GD library which is utilized to edit graphics. it can create thumbnail images or even drawing graphs. Many edits can be done easily and we can also apply photo filters. We can create GIF, PNG, JPG from the code. Once it is enabled on the server, we can easily download it and create thumbnails and many more.

GD library is supported on VPS Hosting packages.

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It is the record which specifies the mail servers that handle email for your domain is an MX record. MX record is a part of the several other network records which define where a particular domain name will resolve from . By default, all of the email for your domain is handled by Dotnoc’s mail server. You can, however, choose to have another mail server handle your email. You can select a mail server such as Register.com or you can specify an Exchange, Novell or other in-house mail server. If your organization has multiple mail servers (such as a primary and secondary server) you can specify multiple IP addresses and set the priority for each.

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Following are steps that will configure your APF firewall on Dedicated Server Hosting packages :

> Open /etc/apf/ad/conf.antidos
> Change LP_KLOG=”0″ to LP_KLOG=”1″
> CONAME=”Your Company” ( Enter Companies Name )
> Change USR_ALERT=”0″ to USR_ALERT=”1″ ( 1 only if you need alerts for emails )
> USR=”you@yourco.com” ( Enter the Email Address )
> Execute : crontab -e

*/2 * * * * root /etc/apf/ad/antidos -a >> /dev/null 2>&1

This will run anti-dos in two minutes

This will Configure APF on your Dedicated Server Hosting Packages

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To backup a directory-tree from another system, rsync and ssh combine to a great tool.To backup a remote directory-tree to a local directory, use the following command given below:

rsync -avz -e ssh user@remote_host:/path/to/dir localdir

This command will copy the directory-tree under /path/to/dir on the remote host remote_host to your local host under localdir.

rsync has to be installed on both hosts, as well as ssh.

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SpamAssassin is a mail filtering software to identify spam. It is an email filter software which uses a wide range of tests to identify unsolicited bulk emails which is more commonly known as Spam. These tests are applied to email headers and content to classify email using advanced statistical methods. In addition to this, SpamAssassin has a modular architecture which allows other technologies to be quickly wielded against spam and is designed for easy integration into virtually any email system.SpamAssassin’s practical multi-technique approach, modularity, and extensibility continue to give it an advantage over other anti-spam systems. Due to these features, SpamAssassin is widely used in all aspects of email management. You can easily find SpamAssassin in use in both email clients and servers, on many different OS, filtering incoming as well as outgoing email, and implementing a very broad range of policy actions. These installations include service providers, businesses, not-for-profit and educational organizations, and end-user systems. SpamAssassin also forms the basis for numerous commercial anti-spam products available on the market today.

Some basic features of SpamAssassin are as follows:-

1) Header tests

2) Body phrase tests. For more information, see SpamAssassinRules.

3) Bayesian filtering (BayesFaq)

4) Automatic address whitelist/blacklist (AutoWhitelist)

5) Manual address whitelist/blacklist (ManualWhitelist)

6) Collaborative spam identification databases (DCC, Pyzor, Razor2); See NetworkTests.

7) DNS Blocklists, also known as “RBLs” or “Realtime Blackhole Lists”. See DnsBlocklists

Character sets and locales

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The Pound program is a reverse proxy, load balancer and HTTPS front-end for Web servers. This Pound was developed to enable distributing the load among multiple Web servers and to allow for a convenient SSL wrapper for those Web servers which do not offer it natively. Pound is distributed under the GPL – no warranty, it’s free to use, copy and give away.

1) Reverse-proxy: it passes requests from client browsers to one or multiple back-end servers.

2) Load balancer: it will distribute the requests from the client browsers among several back-end servers, while keeping session information.

3) An SSL wrapper: Pound will decrypt HTTPS requests from client browsers and pass them as plain HTTP to the back-end servers.

4) An HTTP/HTTPS sanitizer: Pound will verify requests for correctness and accept only well-formed ones.

5) A fail over-server: should a back-end server fail, Pound will take note of the fact and stop passing requests to it until it recovers.

6) Request redirector: requests may be distributed among servers according to the requested URL.

Pound is a compatible program, which can be easily audited for security problems. It can run as setuid/setgid and/or in a chroot jail. Pound does not access the hard-disk at all (except for reading the certificate file on start, if required) and should thus pose no security threat to any machine.

Note:-
  1) Pound is not a Web server: by itself, Pound serves no content – it contacts the back-end server(s) for that purpose.
2) Pound is not a Web accelerator: no caching is done – every request is passed “as is” to a back-end server.

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To kill a user’s process in unix/linux hosting or want’s to terminate a user’s process from the shell then you can use the following commands:-

If you want the user jason’s process detailsps -aux |grep jason

from the output just kill the process id of that user and that user will be out from the shell without any wall message for him/her.

By another way you can do following:-

Task: How to halt/stop user called jason

Type the skill command as follows:
# skill -STOP -u jason

You muse be root to stop other users.
Task: How to resume an already halted user called jason

To send a CONT signal to user jason, type the following command:
# skill -CONT -u jason
Task: How to kill and logout user called jason

To send a KILL signal, type the following command:
# skill -KILL -u jason
Task: Kill and logout all users

The ultimate command to kill and logout all users, type the following command:
# skill -KILL -v /dev/pts/*

Note: You should send users a warning message or a logout notice using the wall command to avoid data loss.

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What is Xoops?

XOOPS is an acronym which stands for eXtended Object Orientated Portal System. XOOPS is a free CMS(Content Management System)it is written in PHP for websites.It is a tool to manage the content of dynamic Websites.Xoops uses a modular architecture which enables users to customize, update and theme their websites.It is released under the terms of the GNU (General Public License (GPL) so it is free to use, modify and redistribute.Xoops is a website system which allows you to build a complete website for a huge variety of different styles and uses.It is an easy software for newcomers to web building and experienced programmers alike. If you want a simple website like a personal blog, or any other pages to display your family photos albums, then xoops is the perfect for it.The Xoops system is Capable to allow several thousands of daily page views and unlimited membership signup.Due to it’s large variety of styles and design features every community webmaster can create a totally unique look and functionality no a website.It provides contact forms that reject spammers, user questionnaires, forms and reports, customers polls, surveys and feedback which are all seamlessly available through the comprehensive module system.

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Just follow the steps below to perform a full backup in cPanel Hosting:-

1) Login into your cPanel with the Username and password

2) Click on Backup cPanel backup, backup website cpanel, cpanel hosting backup.

3) Click on Generate / Download a Full Backup.

4) Select Home Directory in Backup Destination and enter your email address. others just leave blank and click Generate Backup.

5) Done! You just perform a full backup in cPanel. You will received a notification email once the backup is done.

6) Once the backup is ready, you can FTP into your Account to download the backup file. CPanel locate your backup file in your root directory (/home/username/) and cPanel backup filename normally look like this:-
backup-mm.dd.yyyy_hh-mm-ss_username.tar.gz

Note:You also can FTP your full backup file to your another FTP server (if you have more than 1 server). Just enter the Remote Server (FTP / SCP) which is the IP or domain name, Remote User (FTP / SCP) and Remote Password (FTP / SCP) in the Generate Backup page before you hit Generate backup button, your Backup File will be transfer to the remote server.

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