Method try_flush

nodedb/src/engine/timeseries/manager.rs:170–186

Attempt to rotate and flush. Call this when `IngestResult::FlushNeeded`. 1. If frozen is still pending, flush it first (blocking). 2. Freeze the active memtable (drain → frozen). 3. Create a new empty active memtable. 4. Flush the frozen data to L1. Returns the number of segments written to L1.

(&mut self)

    ///
    /// Returns the number of segments written to L1.
    pub fn try_flush(&mut self) -> std::io::Result<usize> {
        // If there's a pending frozen buffer, flush it first.
        if self.frozen.is_some() {
            self.flush_frozen();
        }

        // Freeze current active memtable.
        let flushed_data = self.active.drain();
        if flushed_data.is_empty() {
            return Ok(0);
        }

        self.frozen = Some(flushed_data);
        self.flush_frozen();

        Ok(self.bucket.l1_segments_written() as usize)
    }

    /// Flush the frozen memtable to L1 segments.
    fn flush_frozen(&mut self) {