Hardware Requirements
The actual requirement varies greatly with:
Number of concurrently active users
Number of actually connected devices per user
Activities of the users - solely text-based messaging takes minimal resources; while file sharing and jpg uploads will consume more resources
Bot or integration activity level; different bot and/or integrations have different requirements
The following are sized for the minimal cost deployment unit available for bare-metal server and cloud VPS.
Intel Xeon E5-2603 v4 (or equivalent) [1.7 GHz, 6 cores, $213 USD]
4 GB RAM
500 GB hard disk or larger
Ubuntu 18.04 LTS (with or without docker)
The above minimal hardware configuration is ideal for corporate or group with up to 1,000 users, up to 300 concurrently active and moderate levels of mixed uploads, sharing, and bot activities.
Single core (2 GHz)
1 GB RAM
30 GB of SSD
The above minimal virtual configuration, when not over-provisioned by the provider, is ideal for small deployments of up to 200 users, up to 50 concurrently active and minimal level of mixed uploads, sharing, and bot activities.
Dual-core (2 GHz)
2 GB RAM
40 GB of SSD
The above virtual configuration, when not over-provisioned by the provider, can accommodate small deployments of up to 500 users, up to 100 concurrently active and moderate levels of mixed uploads, sharing, and bot activities.
Raspberry Pi 3 or Pi 2 ($35 all-in-one system)
4 cores 1 GB memory
32 GB SD card ($15)
The above minimal configuration can accommodate a small office or group of up to 50 users and up to 25 concurrently active and moderate levels of mixed uploads, sharing, and bot activities. This is based on a managed MongoDB service (such as mlab.com). Running mongo local to a Pi is not recommended at this time.
