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timescaledb-oss-1.5.0-postgresql-9.6 (1.5.0~ubuntu19.04) disco; urgency=low

  * This release adds major new features and bugfixes since the 1.4.2 release. We deem it moderate priority for upgrading.

  * This release adds compression as a major new feature. Multiple type-specific compression options are available in this release (including DeltaDelta with run-length-encoding for integers and timestamps; Gorilla compression for floats; dictionary-based compression for any data type, but specifically for low-cardinality datasets; and other LZ-based techniques). Individual columns can be compressed with type-specific compression algorithms as Postgres' native row-based format are rolled up into columnar-like arrays on a per chunk basis. The query planner then handles transparent decompression for compressed chunks at execution time.

  * This release also adds support for basic data tiering by supporting the migration of chunks between tablespaces, as well as support for parallel query coordination to the ChunkAppend node. Previously ChunkAppend would rely on parallel coordination in the underlying scans for parallel plans.

 -- Timescale <email address hidden>  Thu, 31 Oct 2019 17:18:54 +0000

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