Enum IdGranularity

Namespace: AdCodicem.ValueObjects.Identifiers
Assembly: AdCodicem.ValueObjects.Identifiers.dll

The width of the time bucket that heads the body of an entity identifier.

public enum IdGranularity

Fields

Minute = 0

One bucket per minute. Six characters, usable until the year 4062.

Hour = 1

One bucket per hour. Four characters, usable until the year 2139. The default.

Day = 2

One bucket per day. Three characters, usable until the year 2109.

Remarks

The bucket exists to give the index a monotonic head, so that inserts land at the right edge of the B-tree instead of scattering across it. It leaks the creation time of the identifier at exactly this granularity and nothing finer; the random part keeps its full 80 bits either way, so enumeration is unaffected.

Choose it from the insert rate of the table, not from taste: aim for a bucket holding roughly 10⁴–10⁵ rows. Wider and writes scatter again, narrower and the identifier leaks more precisely than it needs to.