System Requirements

H/W Specification

The network performance is measured based on the worst hardware specification within the network. According to the blockchain network structure, it is only possible to be scaled up vertically (increasing hardware capacity). Hence, it is recommended that all the nodes within the network should have the best hardwares having the similar specifications with each other at least.

If you're curious about the rationale of this hardware spec, the medium article Determining optimal hardware specs for Klaytn node operators would help you understand.

The following sections show the recommended specifications for both CNs and PNs.

Bare-metal Server

Category	Specification
Server	Intel® Server System M50CYP1UR212
CPU	Intel® Xeon 8358 2.60 GHz (32-core/64-thread)
Memory	128GB (32GB * 4)
Storage	3TB (or larger size) SSD (The preferred storage size and configuration could differ depending on the chain data size. Please consult the Klaytn Team for more information.)

Note that this is a recommended hardware specification for CNs and PNs, not an exact requirement. Any physical machine with similar hardware configurations would be sufficient to operate a CN or a PN.

Cloud VM

Recommended Specification for AWS

Node Type	Model	vCPU	Memory (GiB)	Storage size (GiB)	Storage speed (IOPS)	Price (Seoul region, USD/h)
CN	m6i.8xlarge	32	128	3,000 (Minimum)	9,000	1.888
PN	m6i.4xlarge	16	64	3,000 (Minimum)	9,000	0.944

This storage specification is derived from AWS EBS SSD (gp3) specification.

The information above is from https://aws.amazon.com/ec2/instance-types/ and https://aws.amazon.com/ec2/pricing/on-demand/ and may be changed by AWS.

Recommended Specification for Azure

Node Type	Model	vCPU	Memory (GiB)	Storage type (GiB)	Storage speed (IOPS)	Price (Korea Central, USD/h)
CN	D32s v5	32	128	P50 (4096)	7500	1.888
PN	D16s v5	16	64	P50 (4096)	7500	0.944

This storage specification is derived from Azure Premium Disk specification.

The information above is from https://azure.microsoft.com/en-us/pricing/details/virtual-machines/series/ and https://azure.microsoft.com/en-us/pricing/details/managed-disks/#pricing and may be changed by Microsoft.

Storage Requirements

Assuming 100 TPS in average, 300 bytes average transaction size, and 1-second block latency, the expected daily storage requirement is about 2.5 GB/day (=300x100x86400).

Operating System

Recommended environment is compatible with RHEL (7.8 or later). Klaytn binaries are fully tested on Amazon Linux 2, but they should work on other linux-based environments as well. macOS binaries are also provided for development purpose.