Specifications of compute nodes

PolarDB for MySQL provides the Cluster Edition, Single Node, and Archive Database editions. Each edition provides different specifications of compute nodes.

The following sections show the specifications of compute nodes in different PolarDB for MySQL editions:

• A Cluster Edition cluster supports the General-purpose and Dedicated specifications.
  • Dedicated: The computing resources such as CPUs that are allocated to each cluster are exclusive to the cluster. This improves the stability and reliability.
  • General-purpose: Idle computing resources such as CPUs are shared among clusters on the same server for cost-effectiveness.
• A Single Node cluster uses nodes of the burstable performance type and shares resources in a computing resource pool. This improves resource usage. The Single Node architecture also reduces resource costs because no proxy is required.
• By default, a Archive Database cluster uses one dedicated node. This reduces the expenses on PolarProxy and the overheads of synchronizing redo logs.

Table 1. Specifications of compute nodes

Edition	Node specification code	CPU and memory	Maximum storage capacity	Maximum number of connections	Internal bandwidth	Maximum IOPS	I/O bandwidth
Cluster Edition (Dedicated)	polar.mysql.x4.medium	2 cores, 8 GB	5 TB	2,000	1 Gbps	8,000	1 Gbps
	polar.mysql.x4.large	4 cores, 16 GB	10 TB	8,000	10 Gbps	32,000	4 Gbps
	polar.mysql.x4.xlarge	8 cores, 32 GB	20 TB	10,000	10 Gbps	64,000	8 Gbps
	polar.mysql.x8.xlarge	8 cores, 64 GB	30 TB	10,000	10 Gbps	72,000	10 Gbps
	polar.mysql.x8.2xlarge	16 cores, 128 GB	100 TB	20,000	10 Gbps	128,000	16 Gbps
	polar.mysql.x8.4xlarge	32 cores, 256 GB	100 TB	64,000	10 Gbps	192,000	24 Gbps
	polar.mysql.x8.8xlarge	64 cores, 512 GB	100 TB	64,000	10 Gbps	192,000	24 Gbps
	polar.mysql.x8.12xlarge	88 cores, 710 GB	100 TB	64,000	25 Gbps	256,000	32 Gbps
Cluster Edition (General-purpose)	polar.mysql.g2.medium	2 cores, 4 GB	5 TB	1,800	1 Gbps	3,000	1 Gbps
	polar.mysql.g4.medium	2 cores, 8 GB	5 TB	2,000	1 Gbps	4,000	1 Gbps
	polar.mysql.g2.large	4 cores, 8 GB	10 TB	3,000	10 Gbps	7,500	2 Gbps
	polar.mysql.g4.large	4 cores, 16 GB	10 TB	6,000	10 Gbps	10,500	2 Gbps
	polar.mysql.g2.xlarge	8 cores, 16 GB	10 TB	6,000	10 Gbps	12,000	2 Gbps
	polar.mysql.g4.xlarge	8 cores, 32 GB	20 TB	10,000	10 Gbps	18,000	4 Gbps
	polar.mysql.g4.2xlarge	16 cores, 64 GB	30 TB	16,000	10 Gbps	21,000	4 Gbps
Single node	polar.mysql.s2.large	4 cores, 8 GB	5 TB	1,200	1 Gbps	8,000	1 Gbps
Archive database	polar.mysql.a4.large	4 cores, 16 GB	50 TB	8,000	10 Gbps	32,000	4 Gbps
	polar.mysql.a4.xlarge	8 cores, 32 GB	100 TB	10,000	10 Gbps	64,000	8 Gbps
	polar.mysql.a8.xlarge	8 cores, 64 GB	100 TB	10,000	10 Gbps	72,000	10 Gbps
	polar.mysql.a8.2xlarge	16 cores, 128 GB	100 TB	20,000	10 Gbps	128,000	16 Gbps
	polar.mysql.a8.4xlarge	32 cores, 256 GB	100 TB	64,000	10 Gbps	192,000	24 Gbps
	polar.mysql.a8.8xlarge	64 cores, 512 GB	100 TB	64,000	10 Gbps	192,000	24 Gbps
	polar.mysql.a8.12xlarge	88 cores, 710 GB	100 TB	64,000	25 Gbps	256,000	32 Gbps