- Read pool of size 1 can only have zonal availability.
- Read pools with node count of 2 or more can have regional
availability (nodes are present in 2 or more zones in a
region).
SECONDARY (3):
SECONDARY instances support read operations
only. SECONDARY instance is a cross-region read
replica
Enums
Name
Description
INSTANCE_TYPE_UNSPECIFIED
The type of the instance is unknown.
PRIMARY
PRIMARY instances support read and write operations.
READ_POOL
READ POOL instances support read operations only. Each read pool instance consists of one or more homogeneous nodes.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Class InstanceType (0.4.8)\n\nVersion latestkeyboard_arrow_down\n\n- [0.4.8 (latest)](/python/docs/reference/alloydb/latest/google.cloud.alloydb_v1alpha.types.Instance.InstanceType)\n- [0.4.7](/python/docs/reference/alloydb/0.4.7/google.cloud.alloydb_v1alpha.types.Instance.InstanceType)\n- [0.3.16](/python/docs/reference/alloydb/0.3.16/google.cloud.alloydb_v1alpha.types.Instance.InstanceType)\n- [0.2.1](/python/docs/reference/alloydb/0.2.1/google.cloud.alloydb_v1alpha.types.Instance.InstanceType)\n- [0.1.1](/python/docs/reference/alloydb/0.1.1/google.cloud.alloydb_v1alpha.types.Instance.InstanceType) \n\n InstanceType(value)\n\nType of an Instance \n\n - Read pool of size 1 can only have zonal availability.\n - Read pools with node count of 2 or more can have regional\n availability (nodes are present in 2 or more zones in a\n region).\n SECONDARY (3):\n SECONDARY instances support read operations\n only. SECONDARY instance is a cross-region read\n replica"]]
