From pythomnic3k

Contents 1 What is it for ? 2 3 How to: 4 Architecture 5 Design considerations: 5.1 Compatibility:

What is it for ?

Pythomnic3k facilitates writing network services and distributed applications, which is useful in the following areas:

• Network services providing unified API to a bunch of 3rd party systems
• Distributed fault-tolerant LAN applications, built around a redundant set of network services
• Middleware layer orchestrating various systems in a LAN
• Standalone "regular" network services, exposed to Internet clients

If it is a framework, it has to make certain tasks simple. Pythomnic3k makes it simple to

• Start up a network service for any supported protocol
• Implement request processing in simple protocol-independent uniform way
• Write and modify application code online, with no need to restart
• Make application distributed by partitioning it into functional components
• Add redundancy to application by running multiple copies of its components
• Access external resources, such as databases or other network services
• Monitor and maintain the resulting distributed application
• Test each module of the developed service independently, the Python way

How to:

• Install
• Start one simple network service
• Start two separate services and make one call another
• Connect a service to a resource
• Contribute

Architecture

• Overview
• Service (cage) structure
• Communications between cages
• Request processing
• Development cycle
• Resources
• Transactions
• Persistency
• Retried calls
• Performance and scalability
• Extending
• Configuration
• Type checking
• Files layout
• Syntax reference

Design considerations:

• Simplicity. Minimum concepts with maximum reach
• Modularization through functional decomposition
• Network services are real-time applications
• The real world is not transactional
• Reliability is predictability
• Failures are unavoidable, you can only minimize the chances and be prepared

Compatibility:

Pythomnic3k has been tested under the following platforms:

• Windows 2003 Server 32-bit and 64-bit
• Windows 2008 Server 32-bit
• FreeBSD 7.x 32-bit and 64-bit
• Ubuntu 8.04 LTS and 8.10 Desktop
• CentOS 5.2 32-bit and 64-bit