Storage and Access Methods
Everything Cloudberry stores ends up as bytes in files on a segment. This part follows that path from the access methods down to the storage manager.
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Chapter 5
Append-Optimized Tables in Cloudberry: AO and AOCS
The AO and AOCS on-disk format explained — MemTuple, varblocks, the block directory, gp_fastsequence, DML visibility, vacuum and compaction.
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Chapter 6
PAX: Apache Cloudberry's Native Columnar Storage
Cloudberry's PAX access method — micro-partition file format, manifest catalog, encoding, min/max and Bloom sparse filters, and Z-order clustering.
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Chapter 7
Indexes in Cloudberry: B-Tree, GIN, BRIN and Bitmap
How each index access method works on an MPP cluster, including the Greenplum-inherited on-disk bitmap index that upstream PostgreSQL does not have.