Clustering (WebMail Pro 6 PHP)

From AfterLogic Wiki

High-availability clusters (also known as HA Clusters or Failover Clusters) are computer clusters that are implemented primarily for the purpose of ensuring high availability of services provided by the cluster. HA cluster implementations attempt to build redundancy into a cluster to eliminate single points of failure.

AfterLogic provide a couple of howtos to help our customers to decide - what type of clusterisation is prefered to keep AfterLogic Solutions Highly Available to their users.

Clustering options are often used for one or few critical points on hosted application in production services (may be applied independently).

There are couple of guides to having a highly available mission critical web applications and storages, such as email portals and their databases:

1. Stronghold databases — MySQL NDB (building shared database storage)
2. Distributed or replicated file sharing on a network (data storage which has multiple connections powered by Storage area network) — Multiserver NFS configuration (building shared file storage)
3. Web customer services such as electronic commerce websites or e-mail solutions — Multiserver NFS configuration (building shared file storage), Using Round robin DNS (building load balancer)
4. Clustering PHP

Last edit: 2011/2/07

WebMail Pro PHP documentation
Installation System Requirements Installation Instructions for Windows Installation Instructions for Linux Upgrading instructions Configuring calendar support Install on cPanel Install on Plesk Panel Install on DirectAdmin	Configuring WebMail Getting started Configuring default domain settings Managing domains and users Managing subadmins Configuring WebMail via settings.xml Advanced configuration via config.php file Configuring web domain names Use POPPASSD to let users change their passwords Configuring voice messages support Configuring reminders Use Webmail without a database AdminPanel Guide	Customization Translating to another language How to place banner ads Adding global signature for outgoing mails Modifying or removing copyright info Creating your own skin Adding toolbar buttons Adding menu item Adding language constant Modifying columns in message list How to add new tab in account settings area	Integration Creating domains, logging accounts in, deleting domains and accounts via API Embedding WebMail into your web application via IFRAME Enable LDAP authentication Use address book stored in LDAP server like Active Directory or OpenLDAP Use Sieve for filtering API reference Logging in programmatically Synchronization Outlook Sync Add-in SyncML support	Clustering Overview Multiserver NFS configuration (building shared file storage) MySQL NDB (building shared database storage) Setting MySQL for high availability Clustering PHP Using Round robin DNS (building load balancer)	See Also Changelog Importing contacts Keyboard Shortcuts License Agreement Support Credits