LibreQoS/docs/SystemRequirements/Compute.md

System Requirements

VM or physical server

• For VMs, NIC passthrough is required for optimal throughput and latency (XDP vs generic XDP). Using Virtio / bridging is much slower than NIC passthrough. Virtio / bridging should not be used for large amounts of traffic.

CPU

• 2 or more CPU cores
• A CPU with solid single-thread performance within your budget. Queuing is very CPU-intensive, and requires high single-thread performance.

Single-thread CPU performance will determine the max throughput of a single HTB (cpu core), and in turn, what max speed plan you can offer customers.

Customer Max Plan	Passmark Single-Thread
100 Mbps	1000
250 Mbps	1250
500 Mbps	1500
1 Gbps	2000
2 Gbps	3000
4 Gbps	4000

Below is a table of approximate aggregate throughput capacity, assuming a a CPU with a single thread performance of 2700 or greater:

Aggregate Throughput	CPU Cores
500 Mbps	2
1 Gbps	4
5 Gbps	6
10 Gbps	8
20 Gbps	16
50 Gbps*	32

(* Estimated)

So for example, an ISP delivering 1Gbps service plans with 10Gbps aggregate throughput would choose a CPU with a 2500+ single-thread score and 8 cores, such as the Intel Xeon E-2388G @ 3.20GHz.

Memory

• Minimum RAM = 2 + (0.002 x Subscriber Count) GB
• Recommended RAM:

Subscribers	RAM
100	4 GB
1,000	8 GB
5,000	16 GB
10,000*	18 GB
50,000*	24 GB

(* Estimated)

Server Recommendations

It is most cost-effective to buy a used server with specifications matching your unique requirements, as laid out in the System Requirements section above. For those who do not have the time to do that, here are some off-the-shelf options to consider:

Aggregate	100Mbps Plans	1Gbps Plans	4Gbps Plans
1 Gbps Total	A
10 Gbps Total	B or C	B or C	C

• A | Lanner L-1513-4C (Select L-1513-4C)
• B | Supermicro SuperServer 510T-ML (Select E-2388G)
• C | Supermicro AS-1015A-MT (Ryzen 9 7700X, 2x16GB DDR5 4800MHz ECC, 1xSupermicro 10-Gigabit XL710+ X557)