Welcome to the OnixS ultra-low latency C++ FIX Engine.

The documentation for the FIX Engine includes extensive class library reference, conceptual overviews, step-by-step procedures, and information about samples.

Introduction contains basic information about C++ FIX Engine.
System Requirements tells about supported platforms and development environments.
Getting Started describes key concepts.
- Error Reporting
- Licensing
- Engine Initialization and Shutdown
- Selecting FIX Protocol Version
- FIX Message
  - Manipulating FIX Message Fields
  - FIX Repeating Groups
- FIX Session
Configuring the Engine explains the configuration options.
- Complete Reference of Configuration Settings
- Specifying Multiple Listen Ports
- Example of Configuration File
Venue Specific Settings describes venue specific settings.
- CME Specific Settings
Logging Services
- File-based Logs Structure
- Selecting Storage for Session Messages Logging
- Restoring Session State from Log Files
- Customizing Logging
FIX Engine Threading Models
FIX Engine Thread Safety
FIX Repeating Groups
FIX Sessions
- Understanding Session States
- Listening to Session Events
- Accepting FIX Session Without a Prior Creation of Session Object
- Connecting using Custom Logon Message
- Logon Password Authentication
- Establishing FIX Connection via Proxy
- Asynchronous Logon/Logout
- Resetting Message Sequence Numbers
- Resetting Message Sequence Numbers via ResetSeqNumFlag Field
- Resending Messages
- Memory-based Session Storage
- File-Based Session Storage
- Asynchronous File-Based Session Storage
- Pluggable Session Storage
- Scheduling Sessions for Automatic Connection
  - Session Schedule
  - Session Connection Settings
  - Predefined Schedules and Connection Settings
  - Scheduler Threading Models
- Failover
- Understanding Send Latency
- Understanding Receive Latency
- Asynchronous Processing of Incoming Messages
- Message Throttling
- FlatMessage Mode
- ExternalThread Mode
- Controlling Outgoing Message Flow
- Memory Consumption
FIX Messaging
- Manipulating Real Numbers
- Message Validation
- Flat FIX Message
- Typed FIX Messages
FIX Dictionary
- Editing Dictionaries Descriptions
- Session-level Dictionaries
- Dictionary Exploration
- Using QuickFIX Data Dictionary
TLS/SSL Encryption
- Using TLS/SSL Encryption in Session Connections
- Supported Certificates
- Per-session TLS/SSL Settings
- Troubleshooting
FIX/FAST Decoding and Encoding
- FAST Protocol Decoding and Encoding using Message object
- Decoding Data using FAST Event-based decoder
- Dictionary-independent mode usage
- FAST Decoding Templates
- Dictionary-independent FAST coding and decoding
SBE Decoding and Encoding
- SBE Main Features
- SBE Protocol Decoding and Encoding using Message object
- Decoding Data using SBE Event-based decoder
- Dictionary-independent mode usage
- SBE Decoding Templates
- SBE Customization
Linux Signals
Solarflare Specific Features
Best Practices summarize our findings and recommend best practices to tune the different layers of C++ FIX Engine
- Low Latency Best Practices
- High Throughput Best Practices
Frequently Asked Questions contains answers to the most commonly asked questions.
Glossary
Support provides links to support resources.
Samples

Table of Contents