# Netflix/EVCache

A distributed in-memory data store for the cloud

Repository: https://github.com/Netflix/EVCache
Canonical: https://ross.abutalabs.com/products/evcache
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2026-08-11T21:21:29+00:00

## Health v2 (maintenance only)
Score: 91/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 78, longevity 100
- inputs: {"age_days": 4954, "days_push": 22, "days_rel": 69, "gap_med": 36.0, "n_releases_24m": 11}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2208, forks 256 (observed 2026-08-28T04:06:26.171276+00:00)

## What it is
EVCache is a distributed in-memory key-value caching library built on memcached and spymemcached, designed primarily for AWS EC2 cloud infrastructure. It stores ephemeral, volatile data with TTL-based expiration for caching frequently used data at scale.

## Use cases
- cache frequently accessed data in a distributed cloud environment
- store ephemeral key-value data with TTL expiration
- scale memcached caching across AWS EC2 instances
- reduce database load with an in-memory cache layer
- build low-latency data access for microservices
- cache session or user data that can be evicted at any time

## When to choose
- you run workloads on AWS EC2 and need a battle-tested distributed cache
- you want a Java client for memcached with clustering and replication support
- your data is ephemeral and tolerates eviction
- you need proven caching at Netflix-scale traffic

## When to avoid
- you need persistent or durable storage
- you are not on the JVM or cannot use Java
- you want a simple single-node cache without distributed setup
- you need rich data structures beyond key-value pairs (consider Redis instead)

## Facets
- artifact type: library
- maturity: stable
- function: caching, database
- domain: cloud-computing, microservices, backend, performance
- platform: jvm, cloud
- tags: memcached, in-memory-data-store, key-value-store, aws-ec2, netflix, spymemcached, ttl, ephemeral-data, linux

## Member repositories
- Netflix/EVCache (main) score 91

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:26.171276+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:46:20.137659+00:00, confidence not recorded.
  - readme: https://github.com/Netflix/EVCache (fetched 2026-08-28T04:06:26.171276+00:00, sha d737b027ecd6)
- Data as of 2026-08-30T08:39:29.467469+00:00.