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gp_id

The gp_id system catalog table in the pg_catalog schema identifies the Apache Cloudberry system name and number of segments for the system. It also has local values for the particular database instance (segment or coordinator) on which the table resides. This table is defined in the pg_global tablespace, meaning it is globally shared across all databases in the system.

column	type	references	description
`gpname`	name		The name of this Apache Cloudberry system.
`numsegments`	smallint		The number of segments in the Apache Cloudberry system.
`dbid`	smallint		The unique identifier of this segment (or coordinator) instance.
`content`	smallint		The ID for the portion of data on this segment instance. A primary and its mirror will have the same content ID. For a segment the value is from 0-N-1, where N is the number of segments in Apache Cloudberry. For the coordinator, the value is -1.

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Apache Cloudberry is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.

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