This document discusses scaling a Docker registry. It mentions that the Docker registry can store images using various backends like file storage, S3, Azure, Google Cloud Storage and OpenStack. It also discusses using Elliptics storage which is a key-value store with distributed hash tables and caching. The network discussed connects multiple datacenters with millisecond latency using IPv6.

1. Scaling Docker Registry
Денис Зайцев
SRE, Yandex.
@oktocat
dzaitsev@yandex-team.ru

2. ● index.docker.io
● https://github.com/docker/docker-registry/

3. ● Defaults
● File
● S3
● Other
● Azure
● Google Cloud Storage
● Openstack's Swift and Glance
● OSS
● Elliptics
https://github.com/docker/docker-
registry/blob/master/README.md#storage-options

4. Elliptics Storage
● Key-value.
● DHT by default.
● Secondary indexes.
● Built-in SLRU caching.
https://github.com/reverbrain/elliptics

5. Network
● Multiple datacenters.
● Max RTT ~ 50ms.
● Full Mesh.
● IPv6 Only.