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Why You Must Clean Data, Distribution, and Nodedatamap Before Removing a VC

DEV Community·Michael·20 days ago
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In GBase 8a, deleting a Virtual Cluster (VC) without first clearing its data, distribution maps, and nodedatamap entries is blocked — or worse, causes metadata corruption. This strict sequence is mandatory and enforced by the resource management model and tight metadata coupling inside a gbase database. The Three Items You Must Remove Required Cleanup What It Is Relationship to the VC Consequence of Skipping User Data All actual rows stored in databases and tables created within the VC. The very purpose of the VC — holding data. Orphaned data that consumes storage but cannot be accessed or managed via SQL. A storage leak. Distribution Map Core metadata defining how data segments are spread across Data Nodes. Each VC can have up to two distribution maps. The "blueprint" of the VC's physical data layout and high‑availability design. Stale metadata occupying system tables and pointing to a missing VC, causing conflicts or confusion when creating new VCs.…

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