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Multithreading

As of version 1.14.1 ZeroTier is capable of utilizing more than one CPU core for traffic processing. This enables greater total throughput and more efficient use of machines handling large amounts of traffic.

BETA

This is currently a beta feature and we welcome any feedback and/or test results. For now it is only available for Linux and is disabled by default. It will be ported to FreeBSD, macOS, and Windows in a future release.

The feature requires manual activation using the local.conf file in the same home directory that stores your node’s identity files. If that file is not already present, create it.

Example usage​

Example local.conf
{
   "settings":
   {
       "multicoreEnabled": true,
       "concurrency": 2,
       "cpuPinningEnabled": true
   }
}

See here for more info on how to configure the client using local.conf

Tip for success​

It is recommended that you choose a concurrency level that is reflective of the actual number of physical (not virtual) cores on your machine. For instance, if nproc reports 4, set a concurrency level of 2. Additionally, enabling pinning seems to improve performance in more cases than not.

Multithreading is unlikely to improve performance over the Internet but will over a physical LAN in most cases.