Method async_flush

crates/commitlog/src/index/indexfile.rs:189–191

Asynchronously flushes any pending changes to the index file Due to Async nature, `Ok(())` does not guarantee that the changes are flushed. an `Err` value indicates it definitely did not succeed

(&self)

    /// Due to Async nature, `Ok(())` does not guarantee that the changes are flushed.
    /// an `Err` value indicates it definitely did not succeed
    pub fn async_flush(&self) -> io::Result<()> {
        self.inner.flush_async()
    }

    /// Asynchronously flushes the index entry starting at `offset` to the index file.
    ///