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add more info about DTR on the overview page (#2794) 

fix #1904
This commit is contained in:
Viktor Stanchev 2017-04-17 10:13:08 -07:00 committed by Misty Stanley-Jones
parent 4b42dc3abb
commit ef67f49b9b
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datacenter/dtr/2.2/guides/index.md
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@ -23,6 +23,18 @@ who pushed what image at what time. It even allows you to see what dockerfile
lines were used to produce the image and, if security scanning is enabled, to
see a list of all of the software installed in your images.
## Availability
DTR is highly available through the use of multiple replicas of all containers
and metadata such that if a machine fails, DTR continues to operate and can be repaired.
## Efficiency
DTR has the ability to [cache images closer to users](https://docs.docker.com/datacenter/dtr/2.2/guides/admin/configure/deploy-caches/)
to reduce the amount of bandwidth used during docker pulls.
DTR has the ability to [clean up unreferenced manifests and layers](https://docs.docker.com/datacenter/dtr/2.2/guides/admin/configure/garbage-collection/).
## Built-in access control
DTR uses the same authentication mechanism as Docker Universal Control Plane.