System Requirements

VM or physical server

  • Using a dedicated, physical server for LibreQoS is highly recommended.

  • 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

2.5 Gbps

3000

5 Gbps

4000

Below is a table of approximate aggregate throughput capacity, assuming a a CPU with a single thread performance of 2700 / 4000:

Aggregate Throughput

CPU Cores Needed (>2700 single-thread)

CPU Cores Needed (>4000 single-thread)

500 Mbps

2

2

1 Gbps

4

2

5 Gbps

6

4

10 Gbps

8

6

20 Gbps

16

8

50 Gbps

32

16

100 Gbps

64

32

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

32 GB

50,000*

64 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

2Gbps Plans

1 Gbps Total

A

10 Gbps Total

B or C

B or C

C