This topic describes the billable items of PolarDB.
The following figure shows the approximate proportion of each billable item in a PolarDB cluster.
|Compute node (primary node and read-only node)||
Note For more information about the pricing of storage, see Storage pricing.
|Data backup (only charged for the storage that exceeds the free quota)||
Note For more information about the pricing of data backups, see Pricing of data backups that exceed the free quota.
|SQL Explorer (optional)||
Note For more information about the pricing of SQL Explorer, see Pricing of SQL Explorer (optional).
|GDN (optional)||The global database network (GDN) feature is free of charge. You are charged only for each PolarDB cluster that uses the GDN feature. For more information, see GDN.|