Tag
freshness
- Mar 22, 2026 Cache Freshness, Age, and the Directive Precedence Rules How a cache computes whether a stored response is fresh, how Age accumulates across hops, and which directive wins when several apply. internet protocols
- Feb 26, 2026 Crawl Order as Resource Allocation Under a Fixed Budget How to decide which of the ten million known URLs to fetch first, why importance and freshness compete for the same request, and what ordering rules can and cannot promise. information retrieval
- Sep 30, 2025 Conditional GET and the Revalidation Economy How ETag and Last-Modified turn a refetch into a question, what 304 responses actually save, and why strong and weak validators answer different questions. information retrieval
- Aug 21, 2024 Estimating Change Rates from Interval-Censored Fetches Why a page observed to change once in ten fetches does not have a ten percent change rate, and how a Poisson model with a Gamma prior turns sparse observations into a revisit interval. information retrieval
- Aug 14, 2023 Measuring Freshness From Event Time, Not Arrival Time A table can be loaded on schedule and still be stale: lag is a distribution over records, and comparing the newest row timestamp to the clock hides the tail. data engineering