74 lines
2.9 KiB
Markdown
74 lines
2.9 KiB
Markdown
# Supported tags and respective `Dockerfile` links
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- [`1.4.22`, `1.4`, `1`, `latest` (*Dockerfile*)](https://github.com/docker-library/memcached/blob/5fb6459a1eb138dcd9cfcd5fa1aef62ee511d335/Dockerfile)
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For more information about this image and its history, please see the [relevant
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manifest file
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(`library/memcached`)](https://github.com/docker-library/official-images/blob/master/library/memcached)
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in the [`docker-library/official-images` GitHub
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repo](https://github.com/docker-library/official-images).
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# What is Memcached?
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Memcached is a general-purpose distributed memory caching system. It is often
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used to speed up dynamic database-driven websites by caching data and objects in
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RAM to reduce the number of times an external data source (such as a database or
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API) must be read.
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Memcached's APIs provide a very large hash table distributed across multiple
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machines. When the table is full, subsequent inserts cause older data to be
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purged in least recently used order. Applications using Memcached typically
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layer requests and additions into RAM before falling back on a slower backing
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store, such as a database.
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> [wikipedia.org/wiki/Memcached](https://en.wikipedia.org/wiki/Memcached)
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# How to use this image
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docker run --name my-memcache -d memcached
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Start your memcached container with the above command and then you can connect
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you app to it with standard linking:
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docker run --link my-memcache:memcache -d my-app-image
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The memcached server information would then be available through the ENV
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variables generated by the link as well as through DNS as `memcache` from
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`/etc/hosts`.
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For infomation on configuring your memcached server, see the extensive [wiki](https://code.google.com/p/memcached/wiki/NewStart).
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# License
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View [license
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information](https://github.com/memcached/memcached/blob/master/LICENSE) for the
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software contained in this image.
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# Supported Docker versions
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This image is officially supported on Docker version 1.4.1.
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Support for older versions (down to 1.0) is provided on a best-effort basis.
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# User Feedback
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## Issues
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If you have any problems with or questions about this image, please contact us
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through a [GitHub issue](https://github.com/docker-library/memcached/issues).
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You can also reach many of the official image maintainers via the
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`#docker-library` IRC channel on [Freenode](https://freenode.net).
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## Contributing
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You are invited to contribute new features, fixes, or updates, large or small;
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we are always thrilled to receive pull requests, and do our best to process them
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as fast as we can.
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Before you start to code, we recommend discussing your plans
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through a [GitHub issue](https://github.com/docker-library/memcached/issues), especially for more ambitious
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contributions. This gives other contributors a chance to point you in the right
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direction, give you feedback on your design, and help you find out if someone
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else is working on the same thing.
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