timer

1 Preface I have been maintained a legacy distributed timer for months for my employer, then some important pay business are leveraging on it, with 1 billion tasks handled every day and 20k tasks added per second at most. Even though it’s old and full of black magic code, but it also also have insighted and well-designed code. Based on this old, running timer, I summarize and extract as this article, and it wont include any running code(perhaps pseudocode, and a lot of figures, as an adage says: A picture is worth a thousand words)....