Redirect Chain
A sequence of redirects where each URL points at the next: A to B to C to D.
Analogy Mental model
Asking directions and being sent to another person, who sends you to a third. Three floors later you are still looking.
In practice What you actually do
Crawl the site, list every redirect, then rewrite the rules so each old URL points straight at the final destination. This is cheap during a migration and expensive afterwards, when the chains are buried in three configuration files.
Where people get burned Pitfalls
Each hop costs a fraction of the signal and a measurable amount of time, and the visitor sees a blank screen while it happens. Chains also break when someone retires the middle URL, so the whole path fails at once.
This entry was written in English from the Chinese original, not machine-translated. Read the Chinese version →