Key Value Store
A key-value store is the simplest form of NoSQL database, mapping unique keys directly to values with no required schema, optimized for extremely fast lookups, writes, and deletes by key.
12 resources across 2 libraries
Glossary Terms(4)
Graph Database
A graph database stores data as nodes (entities) and edges (relationships) with properties on both, optimizing for queries that traverse many-to-many, deeply c…
Document Database
A document database stores data as flexible, self-contained documents — typically JSON or BSON — allowing each record to have its own structure without requiri…
Key-Value Store
A key-value store is the simplest form of NoSQL database, mapping unique keys directly to values with no required schema, optimized for extremely fast lookups,…
In-Memory Database
An in-memory database stores its primary dataset in RAM rather than on disk, trading persistence guarantees for dramatically lower latency and higher throughpu…
Interview Questions(8)
What is a Key-Value Store and When Should You Use One?
A key-value store is the simplest NoSQL model: every item is an opaque value retrieved by a unique key, with no required schema and no built-in support for que…
What Data Structures Does Redis Support and When to Use Them?
Redis is an in-memory key-value store whose values can be rich data structures — strings, hashes, lists, sets, sorted sets, and streams — each offering differe…
How Do You Design a Good Partition Key in DynamoDB?
A good DynamoDB partition key spreads items as evenly as possible across the table's underlying partitions by having high cardinality and uniform access freque…
How to Design a URL Shortener?
A URL shortener maps a long URL to a short unique code by generating a base62 identifier (via a counter, hash, or random string), storing the mapping in a key-…
How to Design a Distributed Key-Value Store
A distributed key-value store is designed by partitioning keys across nodes with consistent hashing, replicating each key to N nodes for fault tolerance, and c…
How to Design a Shopping Cart Service
A shopping cart service stores per-user line items in a fast, durable key-value store keyed by cart ID, merges anonymous and logged-in carts on login, revalida…
What is etcd and Why Does Kubernetes Depend on It?
etcd is a distributed, strongly consistent key-value store that serves as the single source of truth for all Kubernetes cluster state — every object, from Pods…
What is Consul and How is it Used in DevOps?
Consul is a distributed service networking tool from HashiCorp that provides service discovery, health checking, a distributed key-value store, and service mes…