Method flush

nodedb/src/engine/array/flush.rs:19–25

Flush the array's memtable to a new on-disk segment using a caller-supplied LSN as the segment's flush watermark. A no-op if the memtable is empty.

(&mut self, id: &ArrayId, wal_lsn: u64)

    /// caller-supplied LSN as the segment's flush watermark. A no-op if
    /// the memtable is empty.
    pub fn flush(&mut self, id: &ArrayId, wal_lsn: u64) -> ArrayEngineResult<Option<SegmentRef>> {
        let Some(prepared) = self.prepare_flush(id)? else {
            return Ok(None);
        };
        self.install_flushed_segment(id, prepared, wal_lsn)
            .map(Some)
    }

    fn prepare_flush(&mut self, id: &ArrayId) -> ArrayEngineResult<Option<PreparedFlush>> {
        let store = self.store_mut(id)?;