Specifications of compute nodes

ApsaraDB PolarDB MySQL-compatible edition provides three different editions:Cluster Edition, Single Node, and Archive Database. Each edition provides different specifications of compute nodes.

The following sections describe the specifications of compute nodes in different ApsaraDB PolarDB MySQL-compatible edition editions:

• A Cluster Edition cluster supports the General-purpose and Dedicated specifications.
  • Dedicated: 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 concurrent connections	Internal bandwidth	Maximum IOPS	I/O bandwidth
Cluster Edition (Dedicated)	polar.mysql.x4.medium	2 cores and 8 GB	5 TB	2,000	1 Gbps	8,000	1 Gbps
	polar.mysql.x4.large	4 cores and 16 GB	10 TB	8,000	10 Gbps	32,000	4 Gbps
	polar.mysql.x4.xlarge	8 cores and 32 GB	20 TB	10,000	10 Gbps	64,000	8 Gbps
	polar.mysql.x8.xlarge	8 cores and 64 GB	30 TB	10,000	10 Gbps	72,000	10 Gbps
	polar.mysql.x8.2xlarge	16 cores and 128 GB	100 TB	20,000	10 Gbps	128,000	16 Gbps
	polar.mysql.x8.4xlarge	32 cores and 256 GB	100 TB	64,000	10 Gbps	192,000	24 Gbps
	polar.mysql.x8.8xlarge	64 cores and 512 GB	100 TB	64,000	10 Gbps	192,000	24 Gbps
	polar.mysql.x8.12xlarge	88 cores and 710 GB	100 TB	64,000	25 Gbps	256,000	32 Gbps
Cluster Edition (General-purpose)	polar.mysql.g2.medium	2 cores and 4 GB	5 TB	1,800	1 Gbps	4,000	1 Gbps
	polar.mysql.g4.medium	2 cores and 8 GB	5 TB	2,000	1 Gbps	8,000	1 Gbps
	polar.mysql.g2.large	4 cores and 8 GB	10 TB	3,000	10 Gbps	15,000	2 Gbps
	polar.mysql.g4.large	4 cores and 16 GB	10 TB	6,000	10 Gbps	21,000	2 Gbps
	polar.mysql.g2.xlarge	8 cores and 16 GB	10 TB	6,000	10 Gbps	24,000	2 Gbps
	polar.mysql.g4.xlarge	8 cores and 32 GB	20 TB	10,000	10 Gbps	36,000	4 Gbps
	polar.mysql.g4.2xlarge	16 cores and 64 GB	30 TB	16,000	10 Gbps	42,000	4 Gbps
Single node	polar.mysql.s2.large	4 cores and 8 GB	5 TB	1,200	1 Gbps	8,000	1 Gbps
Archive database	polar.mysql.a4.large	4 cores and 16 GB	50 TB	8,000	10 Gbps	32,000	4 Gbps
	polar.mysql.a4.xlarge	8 cores and 32 GB	100 TB	10,000	10 Gbps	64,000	8 Gbps
	polar.mysql.a8.xlarge	8 cores and 64 GB	100 TB	10,000	10 Gbps	72,000	10 Gbps
	polar.mysql.a8.2xlarge	16 cores and 128 GB	100 TB	20,000	10 Gbps	128,000	16 Gbps
	polar.mysql.a8.4xlarge	32 cores and 256 GB	100 TB	64,000	10 Gbps	192,000	24 Gbps
	polar.mysql.a8.8xlarge	64 cores and 512 GB	100 TB	64,000	10 Gbps	192,000	24 Gbps
	polar.mysql.a8.12xlarge	88 cores and 710 GB	100 TB	64,000	25 Gbps	256,000	32 Gbps