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EAC for Apache
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64-bit Linux Application Cluster for Apache
Application transparent high availability and scalability for Apache
FEATURES BENEFITS
Guaranteed Business Continuity High Availability. 5NINES to 6NINES (99.999% - 99.9999%) system and application uptime.
Dynamic Load Balancing Performance Scalability. Increasing the number of Apache servers in the EAC Apache cluster means adding more performance and more reliability. The performance increase is nearly linear due to EAC's advanced load balancing technology. A single cluster site can contain up to sixteen (16) physical Apache servers.
Software-Only Solution No Front-End Hardware. EAC requires no dedicated front-end devices to perform Apache request load balancing. EAC has a built-in load-balancing algorithm that allows Apache server nodes to make internal load balancing decisions.
Continuous Availability,
Fault Tolerance
Automated Failover. In case of a server failure, failover is performed automatically, and the remaining Apache servers are immediately ready to provide services for the clients of the failed server without administrative intervention.
Easy To Manage, Even Remotely Remote, Centralized Management. An intuitive, Java-based Admin Client provides a user-friendly and centralized management interface for the cluster. Linux Application Cluster is designed to allow all maintenance operations to be performed without creating service interruptions.
Simple To Install And Configure Application Transparency. EAC is a transparent middleware layer for application and clients, enabling fast and easy installation and configuration. In the majority of cases, it requires no modifications to existing applications.
MySQL Cluster Integration MySQL Cluster. Existing EAC for MySQL customers and SQL database users planning a migration to EAC for MySQL can easily build a high-performance, scalable and fault tolerant web platform by using both EAC for Apache and EAC for MySQL as two separate clusters, or even in one cluster, where both Apache and MySQL are in the same box. Both EAC for Apache and EAC for MySQL share the same Admin client, making the management of the system easy.

The need for web server performance and high availability
EAC combines multiple physical Apache web servers so that they work together as one logical, high performance web server. It takes full advantage of available resources and balances the workload between the clustered nodes. EAC delivers almost linear scalability as nodes are added to the cluster.

EAC for Apache enables organizations to predict the cost of scaling up web services from a single Apache node to an enterprise scale Apache cluster, and provides a higher degree of confidence that the web services will continue to perform well as it scales up. With EAC, lower-cost Intel-based systems can easily match the performance and reliability of expensive RISC-based systems.

EAC provides fault management capabilities with automated decision-making to identify faults in any system component. Built-in fault management logic detects software or hardware failures inside of a single Apache server and automatically runs the necessary recovery actions. Failover is transparent to the client applications. The recovery procedure and the workload redistribution is a sub-second operation. EAC fault management is a collection of processes, performed in all fault situations, according to a pre-defined policy.

Software-only load balancing
Load balancing is done by evenly distributing the IP address space, including port numbers, for all the cluster nodes. To implement this sound distribution method, EAC uses dynamically calculated bit masks. A client's IP address and port number is XOR'ed against the bit mask, and the result will tell to the node whether or not it should serve the client in question.

This technique will distribute the average load evenly across all of the nodes. The load balancer, which is running on each of the clustered nodes, eliminates the need for expensive, dedicated network load balancers from vendors such as F5, Cisco or even for open source Linux Virtual Server (LVS) which are also potentially single points of failure unless deployed as redundant pairs at increased hardware/software expense.

EAC provides fault management capabilities with automated decision-making to identify faults in any system component. Built-in fault management logic detects software or hardware failures inside of a single Apache server and automatically runs the necessary recovery actions. Failover is transparent to the client applications. The recovery procedure and the workload redistribution is a sub-second operation. EAC fault management is a collection of processes, performed in all fault situations, according to a pre-defined policy.

System Requirements
Apache Software
Apache 1.3 or Apache 2.0

OS Software
Red Hat 7.x, 9.0
SuSE 7.x, 8.2, 64-bit Enterprise Server
Caldera eServer 2.3
Other Linux with Kernel 2.4
or higher
Hardware
Any Intel-based servers
CPU: minimum 500 MHz
RAM: minimum 256 MB
Disk Space: 10 MB of storage for EAC
(SCSI recommended)
Network Interfaces:
2 NIC cards per node, external and heartbeat (TCP/IP)
Call for Current Price at 800-999-1278 (SALES)
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For further information and pricing please call 1-800-999-1278 or 650-583-7222 to speak with a sales rep. You may also fax your inquiry to 650-583-1974. Product specification and price are subjected to change without further notice.
All specifications above are subject to change without prior notice.
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