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Integrate layer info cache with registry and storage

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This changeset integrates the layer info cache with the registry webapp and
storage backend. The main benefit is to cache immutable layer meta data,
reducing backend roundtrips. The cache can be configured to use either redis or
an inmemory cache.

This provides massive performance benefits for HEAD http checks on layer blobs
and manifest verification.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day 2015-04-01 16:41:33 -07:00
parent a7c2dceea5
commit 6ab228f798
10 changed files with 256 additions and 24 deletions
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4
docs/storage/filereader.go
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@ -27,8 +27,8 @@ type fileReader struct {
// identifying fields
path string
size int64 // size is the total layer size, must be set.
modtime time.Time
size int64 // size is the total size, must be set.
modtime time.Time // TODO(stevvooe): This is not needed anymore.
// mutable fields
rc io.ReadCloser // remote read closer