Struct FreezeReport 

pub struct FreezeReport {
    pub segment_id: u32,
    pub frozen_rows: usize,
    pub bytes_freed: u64,
    pub segment_bytes: Vec<u8>,
}

v5.2.2: outcome of a successful Catalog::freeze_oldest_to_cold call. The catalog state has already been mutated by the time this is returned (hot rows dropped + segment registered + Cold locators flipped). The caller’s only remaining concern is segment_bytes — persist them to disk under <db>.spg/segments/seg_<id>.spg so a future restart can reload via the v5.1 SPG_PRELOAD_COLD_SEGMENT path. (v5.3’s manifest will subsume this manual step.)

Fields

segment_id: u32

Id allocated by Catalog::load_segment_bytes for the new cold-tier segment. Stable across the call’s success path.

frozen_rows: usize

Number of rows that moved hot → cold. Equals the max_rows the caller asked for (the API is strict on the count).

bytes_freed: u64

Hot-tier bytes reclaimed by the freeze — the Table::hot_bytes delta before vs after. Useful to feed back into the freezer’s budget check on the next tick.

segment_bytes: Vec<u8>

Encoded segment bytes, byte-identical to what encode_segment produced. The catalog already owns a copy inside cold_segments; this hand-off lets the caller persist them without re-encoding.

Trait Implementations

impl Clone for FreezeReport

fn clone(&self) -> FreezeReport

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FreezeReport

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.