Tag
placement
- Sep 29, 2026 Failure Domains and the Arithmetic Behind Replication Factor How a copy count becomes a durability estimate, why that estimate collapses when failures correlate, and what placement must do to keep the arithmetic honest. filesystems
- Aug 24, 2026 First-Touch Placement and the Faulting Thread Why a page lands on the node of whichever thread first writes it, what the kernel actually does inside the fault handler, and how the choice of allocation policy changes that default. memory systems
- Aug 6, 2026 CRUSH Placement: Deterministic Mapping Over a Weighted Hierarchy How a pseudorandom placement function turns an object identifier and a cluster map into a device list, why straw selection replaced simpler bucket types, and what changes on topology edits. filesystems
- Jul 20, 2026 Consistent Hashing and What Changes When a Node Joins Why modulo placement reshuffles almost every key on a membership change, how a hash ring limits the movement, and where the ring still concentrates load. filesystems
- Feb 27, 2026 Placement, Routing, and Congestion in the Logic Array How the placer decides where each cell goes, how the router allocates wire segments, and why a design can fail to route while the array looks half empty. hardware engineering
- May 27, 2025 Copysets and the Tail of Random Placement Why uniformly random replica placement produces objects whose copies share a failure set, how many nodes one rack loss can take with it, and what bounded placement changes. filesystems
- Apr 8, 2025 Placement as Bin Packing: Multi-Dimensional Fit and the Fragmentation It Creates Why a scheduler with free cores and free memory can still refuse a pod, how multi-dimensional packing produces unusable holes, and which scoring functions trade density against headroom. cloud infrastructure
- Dec 26, 2024 Filtering and Scoring: How a Scheduler Picks One Node Out of Thousands The two-phase placement cycle, why feasibility is computed per node instead of per constraint, and how scoring turns a set of legal nodes into a single binding decision. virtualization
- Jul 1, 2022 Gang Scheduling: All-or-Nothing Allocation for Distributed Workloads Why a training job or MPI rank set cannot be placed one member at a time, how reservation schemes avoid deadlock, and what each scheme costs the rest of the cluster. cloud infrastructure