Tag
retention
- Oct 14, 2026 Reachability, Retention, and What Counts as a Leak Why unreachable memory and unfreed memory are different problems, how a tracing collector decides an object is dead, and where conservative roots keep garbage alive. memory systems
- Aug 10, 2026 Retention Policy as a Storage Budget How per-stream retention windows turn into bytes on disk, why compression and index size dominate the estimate, and where deletion actually costs money. observability
- Jul 6, 2026 Storing Traces: Two Access Patterns That Cannot Share One Index Why a trace store must support both point lookup by trace identifier and time-range search by service, how indexes serve each, and where retention and cost force the two apart. observability
- May 30, 2026 Decommissioning a Source System: Proving Quiescence Why an idle-looking system is not an unused one, how to measure the absence of traffic, and the sequence that ends with a restore test rather than a shutdown. cloud infrastructure
- Mar 27, 2026 Recording Rules, Pre-Aggregation, and the Cost of Evaluating at Read Time Why the same query evaluated per-panel at render time multiplies work by viewers, how a pre-aggregated rule trades flexibility for a bounded cost, and what staleness the rule introduces. observability
- Jul 24, 2025 Log Compaction, Retention, and Replay Retention deletes from the start of a log and compaction keeps only the newest value per key, which turns the log into a replayable store of current state. backend systems
- May 9, 2025 Append-Only Logs and the Queue Abstraction Destructive reads and append-only retention produce different broker state, different fan-out costs, and different limits on what a consumer can ask for. backend systems
- Dec 23, 2024 How Sampling Rules Decide Which Evidence Survives The telemetry left after an incident is a sample drawn by a rule chosen before the question was asked. Tail sampling, log thresholds, and retention turn the surviving data into a biased census. observability
- Nov 22, 2024 Retention Versus Reinitialisation in Deep Sleep The trade between keeping state alive across a sleep and rebuilding it on wake, expressed as a sleep-current penalty against a per-wake energy cost. embedded systems
- Feb 29, 2024 Cardinality Explosion and Where It Comes From How label combinations multiply into series count, why an unbounded label value destroys an index, and which containment measures actually bound the growth. observability
- Jan 10, 2024 Snapshot Expiry, Reference Counting, and Files That Nothing Points To Why deleting an old snapshot does not delete its files, how a sweeper decides which objects are unreferenced, and the two ways that decision goes wrong in opposite directions. data engineering
- May 22, 2023 Log Destruction, Rotation, and the Gaps It Leaves Behind Which logs an intruder with privilege can erase, which records survive in the kernel and on remote collectors, and how absence of evidence is distinguished from evidence of absence. security
- Sep 24, 2022 Incremental Backup Chains and Restore Depth How changed-block tracking works, why deduplicated storage makes deletion expensive, and why restore time grows with the number of links in the chain. devops