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| High Availiability Hosting |  |  |  |  | CWI Hosting offers customized configurations to meet our client's requirements for highly available applications. The key factor in maintaining a highly available application is removing all single points of failure in the design of the solution. CWI Hosting's expert engineers will design a custom High Availability solution based on your specific application and uptime requirements.
1. Multi-Tier Architecture
Utilizing distinct layers separated into Virtual LAN’s has great security advantages. All outside network traffic is filtered at the firewall to allow only necessary services and their associated ports (usually HTTP and HTTPS on TCP port 80 and 443 respectively). This traffic is allowed to pass to the web server layer. The firewall then restricts web server communication to the application layer via specific ports and protocols. Similarly, the application layer may only communicate with the database layer via its associated rule set (i.e. ODBC).
This architecture forces an attacker to compromise each layer independently in order to reach the data stored in the database layer. Equally, it makes the inclusion of redundancy and High Availability (HA) a smoother process. Multi-tier architectures combined with database encryption (see above) ensure data privacy from the design level.
2. Clustering
Server Clustering offers redundant hardware components and software that provides automatic fail over of hardware and content replication, ensuring that your applications are always available. We offer full support for Windows with Microsoft SQL and Solaris or Linux AS with Oracle clustering solutions.
3. Load Balancing
CWI Hosting provides two distinct service offerings for clients requiring Load Balancing.
 |  | Dedicated Load Balancing powered by f5 BIG-IP Local Traffic Manager |  |  |
The BIG-IP® Local Traffic Manager is an application traffic management system that provides an intelligent and adaptable solution to secure, optimize, and deliver applications, enabling organizations to effectively and competitively run their business.
It’s the only system that features a set of unified application infrastructure services that deliver total control, vision, and flexibility into application security, performance, and delivery. The result? Greater business agility and successful outcomes for the lifeblood of the organization today—the application itself.
| | Shared Load Balancing Powered by CISCO | | |
When you select the Shared Load Balancing Option, your services are delivered via multiple distributed Cisco CSM’s (Content Switching Module). Cisco CSM’s deliver a high-performance, load-balancing solution, providing your customers with an optimum online experience. The Cisco CSM meets the demands of high-speed content delivery networks, tracking network sessions and server load conditions in real time, and directing client requests to the appropriate device. Fault-tolerant Cisco CSM configurations maintain full state information and provide true hitless fail over required for mission-critical applications.
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