in order to know which blob is 'real' (has content)
we need to know which was the first blob inserted in cache,
because that is always the real one.
because we can not modify the keys order in boltdb we'll do this
by marking the first blob inserted with a value
when GetBlob() return the blob which is marked
when PutBlob() if is the first one, mark it
when DeleteBlob() in case deleted is marked then mark the next blob
Signed-off-by: Petu Eusebiu <peusebiu@cisco.com>
Because s3 doesn't support hard links we store duplicated blobs
as empty files. When the original blob is deleted its content is
moved to the the next duplicated blob and so on.
Signed-off-by: Petu Eusebiu <peusebiu@cisco.com>
PR (linter: upgrade linter version #405) triggered lint job which failed
with many errors generated by various linters. Configurations were added to
golangcilint.yaml and several refactorings were made in order to improve the
results of the linter.
maintidx linter disabled
Signed-off-by: Alex Stan <alexandrustan96@yahoo.ro>
Go version changed to 1.14.4
Golangci-lint changed to 1.26.0
Bazel version changed to 3.0.0
Bazel rules_go version changed to 0.23.3
Bazel gazelle version changed to v0.21.0
Bazel build tools version changed to 0.25.1
Bazel skylib version changed to 1.0.2
In a production use case we found that the actual rootdir can be moved.
Currently, cache entries for dedupe record the full blob path which
doesn't work in the move use case.
Only for dedupe cache entries, record relative blob paths.
Upstream conformance tests are being updated, so we need to align along
with our internal GC and dedupe features.
Add a new example config file which plays nice with conformance tests.
DeleteImageManifest() updated to deal with the case where the same
manifest can be created with multiple tags and deleted with the same
digest - so all entries must be deleted.
DeleteBlob() delete the digest key (bucket) when last reference is
dropped
As the number of repos and layers increases, the greater the probability
that layers are duplicated. We dedupe using hard links when content is
the same. This is intended to be purely a storage layer optimization.
Access control when available is orthogonal this optimization.
Add a durable cache to help speed up layer lookups.
Update README.
Add more unit tests.
