18 lines
1,005 B
Text
18 lines
1,005 B
Text
Cstore_fdw is a extension of PostgreSQL. This extension uses the Optimized Row
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Columnar (ORC) format for its data layout. ORC improves upon the RCFile format
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developed at Facebook, and brings the following benefits:
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- Compression: Reduces in-memory and on-disk data size by 2-4x. Can be
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extended to support different codecs.
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- Column projections: Only reads column data relevant to the query.
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Improves performance for I/O bound queries.
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- Skip indexes: Stores min/max statistics for row groups, and uses them
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to skip over unrelated rows.
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Further, cstore_fdw used the Postgres foreign data wrapper APIs and type
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representations with this extension. This brings:
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- Support for 40+ Postgres data types. The user can also create new types
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and use them.
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- Statistics collection. PostgreSQL's query optimizer uses these stats to
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evaluate different query plans and pick the best one.
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- Simple setup. Create foreign table and copy data. Run SQL.
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WWW: https://github.com/citusdata/cstore_fdw
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