Module over_partition 

Types and functions that store or manipulate state/cache inside one single over window partition.

Structs

AffectedRange 🔒

AffectedRange represents a range of keys that are affected by a delta. The CacheKey fields are keys in the partition range cache + delta, which is represented by DeltaBTreeMap.

OverPartition 🔒

A wrapper of PartitionCache that provides helper methods to manipulate the cache. By putting this type inside private module, we can avoid misuse of the internal fields and methods.

OverPartitionStats 🔒

Constants

MAGIC_BATCH_SIZE 🔒

MAX_STALE_ROWS_TO_DELETE_PER_ROUND 🔒

Maximum number of stale rows to delete from one partition in one round of state cleaning, to bound the number of writes buffered in one epoch when there’s a large backlog of stale rows.

Type Aliases

PartitionDelta 🔒

Changes happened in one over window partition.