# Netflix/rend

A memcached proxy that manages data chunking and L1 / L2 caches

Repository: https://github.com/Netflix/rend
Canonical: https://ross.abutalabs.com/products/rend
Language: Go
License: Apache-2.0
License Family: permissive
Last push: 2019-12-06T16:22:41+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4053, "days_push": 2462, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1192, forks 90 (observed 2026-08-28T04:03:56.362373+00:00)

## What it is
Rend is a memcached-compatible proxy server written in Go that manages data chunking and coordinates L1 (RAM) and L2 (SSD-backed) cache tiers. It was developed at Netflix to complement EVCache and is designed to handle tens of thousands of concurrent connections.

## Use cases
- proxy memcached traffic across L1 and L2 cache tiers
- chunk large values to avoid memcached slab fragmentation
- add an SSD-backed L2 cache in front of memcached
- handle tens of thousands of concurrent cache connections
- load test and verify correctness of memcached deployments
- run a caching layer alongside EVCache at scale

## When to choose
- you run memcached at Netflix-like scale and need L1/L2 tiering
- slab fragmentation or memory pressure is causing evictions
- you need a memcached-protocol proxy with modular backends
- you want chunking to handle large or variable-size cache values

## When to avoid
- you use Redis rather than memcached
- you need a small-scale or simple cache with no tiering
- you require active development and recent releases (last release 2019)
- you need full memcached protocol coverage rather than a subset

## Facets
- artifact type: service
- maturity: maintenance
- function: caching, proxy, http-server
- domain: databases, infrastructure-as-code, cloud-computing, performance
- platform: go, self-hosted
- tags: memcached, l1-l2-cache, evcache, data-chunking, ssd-cache, netflix, linux, docker

## Member repositories
- Netflix/rend (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:56.362373+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 2026-08-30T06:22:27.837624+00:00, confidence not recorded.
  - readme: https://github.com/Netflix/rend (fetched 2026-08-28T04:03:56.362373+00:00, sha 1aa18fc803b1)
- Data as of 2026-08-30T08:39:29.467469+00:00.