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StateMirror is a next-generation alternative to the standard state management options for ASP.NET-based web farms. It offers the following:

Benefits

Scalability

 Session/Application state objects are stored on several state servers, enabling you to add as many state servers you need. Multicast requests are used and no multiple peer-to-peer data transfers occur. Check out scalability test results.

Reliability

 Every state object has several copies on different state servers.

Performance

 All state objects are stored in memory, eliminating the I/O bottleneck.

Manageability  

 Easy installation, centralized event logging, clear upgrade path, plus a GUI monitor application that keeps track of all running StateMirror state servers and web servers in the farm.
For more details see online presentation StateMirror - High-Level Overview or StateMirror White Paper

Components

StateMirror installation package contains the following components

StateMirror
Server

 The heart of the StateMirror architecture: an NT service that stores state objects. A web farm can use any number of state servers, depending on the workload.

State Mirror
Client

A .NET assembly that hooks into the ASP.NET working process and takes care of state management functions. StateMirror Client keeps in touch with all active StateMirror Servers and chooses the right server for reading and writing session/application state object. Multicast requests are used to request state info from state servers and to save state object to state servers.

StateMirror
Explorer

 A GUI application that provides up-to-date statistics about all active StateMirror Servers and Clients. It can also perform some basic administrative functions like starting or stopping a server and changing some of its settings
For more details, see the online demo: StateMirror - How It Works

Requirements

Web server configuration:
  • ASP.NET 2.0
  • 200KB of disk space
 State server configuration:
  • ASP.NET 2.0
  • 200KB of disk space
  • A dedicated IP address
 Admin workstation configuration:
  • ASP.NET 2.0
  • 300KB of disk space
  Download

Trial version of StateMirror is free for download. Fill out the registration form and download the trial version of the product.
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Buy

Contact Alfavit to purchase StateMirror license.
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