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Disaster Recovery Documentation

System Redundancy

Third-party Devices

Certain exchanges use machines that act as a middle-tier in the trading network. These machines are referred to as third-party devices. Although in most cases the exchange is responsible for installing, configuring, and managing these devices, certain exchanges allow customers to set up redundant third-party devices for purposes of failover (such as Eurex and eCBOT).

Using redundant third-party devices helps prevent connectivity problems from occurring at this point of failure in the network. Thus, if a device fails, the TT Gateway fails over to another third-party device automatically.

For further information on redundant third-party devices, refer to the disaster recovery chapter of the SAM specific to the appropriate TT Gateway.

In a hot failover environment with redundant third-party devices, traders experience no difficulties if a TT Gateway or third-party device fails. Redundant third-party devices may not be an option with certain exchanges.

Trading Systems

TT’s recommended scenario is to install multiple TT Gateways of the same type (if possible in a hot failover configuration) and multiple third party devices (if possible in a redundant configuration). Using this strategy, the customer has the least exposure to machine failure. If the TT Gateway or a third-party device should fail, the customer still has some form of access to the exchange.

  • If a TT Gateway fails, at minimum traders can log in through other TT Gateways and experience only a short interruption in trading.
  • If a third-party device fails, the TT Gateway cycles to an alternative gateway and reconnects. Again, traders only experience a short interruption in trading.

In both cases, only traders who are connected through failed devices experience interruptions.