Server sizing guidelines and recommended configurations for on-premises installation in customer environments.

On-premises configurations

The tables below are minimum specifications for on-premises installations. Tachyon is recommended to be installed on a dedicated server, and can be installed on physical or virtual hardware. 

A Tachyon system comprises a single Master Stack and one or more Response Stacks. The tables and diagrams show details for a single server which combines Tachyon Master and Response Stacks with either local or remote SQL Servers. Use the same specifications for separated Master and Response Stack servers.

Each Response Stack can have up to five Tachyon Switches and one Background Channel. Each Switch can support up to 50,000 devices therefore a single server with 5 Switches and one Background Channel can support up to 250,000 devices.

Best performance is achieved using a local SQL Server installation but you can install Tachyon and SQL Server on separate (split) servers. A separate SQL Server is required if it is to be shared with other customer applications, and its CPU and RAM should be increased accordingly. Please refer to SQL Server requirements for other detailed requirements.

Disk volumes

For medium and large configurations, separate disk volumes must be used for SQL databases (MDF), logs (LDF), and tempDB files, otherwise installations will take longer and performance will be affected.

SQL maximum server memory

When Tachyon and SQL Server are installed on the same server, then the SQL Server setting maximum server memory must be set to match the value in the table.

AI Powered Auto-curation

Please review AI Powered Auto-curation below for additional hardware requirements if you are using the feature to support inventory based applications such as AppClarity, Application Migration, and Patch Success.


The tables below include ActiveEfficiency Server to support Nomad features only. ActiveEfficiency can be installed on the Tachyon server for small systems. Medium and large systems (over 50000) require separation of incoming network traffic from Nomad and Tachyon clients. Therefore, either ActiveEfficiency or the Response Stack is installed on a separate server, or if both are installed on the same server there are additional networking and DNS requirements, as described in Design Considerations: ActiveEfficiency Server.

For guidance on installing ActiveEfficiency on a separate web server, please refer to ActiveEfficiency Server 1.10 - Implementation.

Additional hardware is required when using ActiveEfficiency Server to support AppClarity 5.2 or Shopping, which require an ActiveEfficiency Scout, please refer to:

In this version of Tachyon there is no integration between ActiveEfficiency services and Tachyon or SLA.

CPU cores listed in the tables below are logical cores (physical or virtual). For deployment on a virtual machine, the CPU cores should be assigned at 100% virtual machine reserve.

Combined Tachyon and SQL Server - up to 25,000 seats

Small 1Small 2Medium 1
Maximum number of devices5005,00025,000

Tachyon Server and SQL Server

CPU cores21216
RAM10 GB32 GB48 GB
SQL Instance Max Memory2 GB10 GB20 GB
Number of Tachyon Switches111
Network interfaces (Tachyon)111
Disk space required for databases1 GB20 GB56 GB
ActiveEfficiency Server (Nomad) - see note above
CPU Coresincluded aboveincluded above1
Network interfaces (ActiveEfficiency)1

Separate Tachyon and SQL Server - up to 200,000 seats

Medium 1Medium 2Large 1Large 2
Maximum number of devices25,00050,000100,000200,000
Tachyon Server
CPU Cores8121624
RAM24 GB36 GB58 GB94 GB
Number of Tachyon Switches1124
Network interfaces (outgoing to SQL plus incoming to Switches)2235
Remote SQL Server
CPU Cores48912
RAM12 GB32 GB44 GB60 GB
SQL Instance Max Memory8 GB28 GB40 GB56 GB
Disk space required for databases56 GB98 GB230 GB530 GB
ActiveEfficiency Server (Nomad) - see note above
CPU Cores1123
Network interfaces (incoming to ActiveEfficiency)1111

A server hosting a Tachyon Response Stack requires a dedicated network interface (MAC Address and IP Address) for each Switch, and for the connection to the remote SQL Server instance used for the Responses database to keep incoming traffic from clients separate from the outgoing traffic to the Response database. This dedicated SQL connection must be at least 1Gbps for Medium environments (up to 50,000) and at least 10Gbps for Large environments (over 50,0000). For more detail please refer to Design Considerations: Network interfaces.

For larger or more complex configurations please contact 1E.

Tachyon Switch Server Sizing

The recommended configuration for a Tachyon Switch when hosted separately on its own server is 2 CPU Cores and 16 GB RAM.

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