eCluster™ Features Highlight:

• layer 7 Global Load Balancing and Fail-over Clustering - Virtual Domain
• Layer 3 Virtual IP (packet based) Load Balancing and Fail-Over - Virtual IP
• Unprecedented High Availability - eliminate all single point of failure for 100% Uptime
• Unprecedented Scalability - large-scale expansion of servers, up to 1 Million Cluster Groups and 4096 Cluster Nodes
• AiForce Dynamic Server Feedback Protocol
• Inter-Cluster Clustering - Load Balance and Fail Over among Unlimited Number of Clusters and Data Centers (Virtual IP is available in Load Balancer/SUN SPARC/FreeBSD with Layer 3 driver.)
• SQL Database Clustering
• SSL Encrypted and Compressed Communication (47:1 ratio) Channel
• Persistent Cookies Switching
• Persistent SSL Packet Switching
• Clustering Algorithm and Rules such as CPU Usage, Load Average, Weighted Load Average, VM Usage, Geographic Proximity (Version 4), RTT, Fail-Over, and File System Space, Number of Processes, Least Connections, Maximum Connections
• Application Server Port Load Balance and Fail-Over
• Scriptability to Take a Server On-Line/Off-Line
• Content Aware Clustering - URL Fail Over, Cold Fusion Fail Over, SQL Fail Over (If one of the URL failed, an automatic fail-over will take place.)
• Firewall and VPN (Available in Load Balancer product, Various BSDs with Layer 3 Driver) with Stateful Packet Inspection
• Preventing Denial of Service (DoS), TCP SYN Attacks, SMURF Attacks, FIN and XMAS scans 
• Packet State Engine - keep track of whether or not a connection is established, works with TCP, UDP and ICMP
• Bandwidth Management and Traffic Shaper
• IP Version 6 Support
• E-Mail Alert for Malfunctions
• CFS, the Clustered File System (add-on)
• Platform Supported, Windows 2000/XP, SUN SPARC/INTEL, Various BSDs/Linux, and OS2000.
• Cluster Agent Available for Windows NT 4/2000/2003/XP, SUN SPARC, Various BSDs/Linux, and OS2000.
• Example Load Balancing and Fail-Over Applications:
  • WAN Links
  • Servers
  • Firewalls
  • VPNs
  • Search Engines
  • Intrusion Detection Systems
  • LDAP
  • MS COM/DCOM
  • Streaming Media - Real Time Streaming Protocol (RTSP)
  • Wireless Internet - Wireless Application Protocol (WAP)
  • VoIP Gateways
  • PBX
  • WebLogic
  • Citrix
  • Oracle
  • PeopleSoft
  • SAP
  • Siebel
  • Lotus
  • and more...

Both hardware and software clustering are available for various Operating Systems.  For success stories, click here.