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Stephen J Day a7c2dceea5 Define and implement layer info cache ... This changeset defines the interface for layer info caches. Layer info caches speed up access to layer meta data accessed in storage driver backends. The two main operations are tests for repository membership and resolving path and size information for backend blobs. Two implementations are available. The main implementation leverages redis to store layer info. An alternative implementation simply caches layer info in maps, which should speed up resolution for less sophisticated implementations. Signed-off-by: Stephen J Day <stephen.day@docker.com>		2015-04-02 20:15:09 -07:00
docs	Define and implement layer info cache	2015-04-02 20:15:09 -07:00