Advanced
Internals that shape an Arc Enterprise cluster's behaviour: the write-ahead log, file compaction, query caching, and data-time partitioning of Parquet files.
These pages describe mechanisms rather than features. They matter in an Enterprise deployment because each one lands on a specific node role: the WAL is a writer concern, compaction usually runs on a dedicated compactor, and query caching lives on readers.
Write-ahead log
How the WAL bounds data loss to the sync interval, and the cost of each sync mode.
File compaction
Merging small Parquet files into larger ones, off the write path.
Query caching
The result, metadata, and S3 file caches a reader node uses.
Data-time partitioning
Why files are laid out by event time, and what that means for backfill.