[patch] add 3 new distance type support for agent-ngt

[kpango]

Signed-off-by: kpango i.can.feel.gravity@gmail.com

Description:

add 3 new distance type support

• NormalizedAngle
• NormalizedCosine
• Jaccard

Related Issue:

How Has This Been Tested?:

Environment:

• Go Version: 1.15.2
• Docker Version: 19.03.8
• Kubernetes Version: 1.18.2
• NGT Version: 1.12.1

Types of changes:

• Bug fix [type/bug]
• New feature [type/feature]
• Add tests [type/test]
• Security related changes [type/security]
• Add documents [type/documentation]
• Refactoring [type/refactoring]
• Update dependencies [type/dependency]
• Update benchmarks and performances [type/bench]
• Update CI [type/ci]

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

Checklist:

• I have read the CONTRIBUTING document.
• I have checked open Pull Requests for the similar feature or fixes?
• I have added tests and benchmarks to cover my changes.
• I have ensured all new and existing tests passed.
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly.

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[codecov]

Codecov Report

Merging #780 into master will decrease coverage by 0.17%.
The diff coverage is 23.07%.

@@            Coverage Diff             @@
##           master     #780      +/-   ##
==========================================
- Coverage   16.92%   16.74%   -0.18%     
==========================================
  Files         421      420       -1     
  Lines       19528    19480      -48     
==========================================
- Hits         3305     3262      -43     
+ Misses      15999    15995       -4     
+ Partials      224      223       -1     

Impacted Files	Coverage Δ
internal/db/storage/blob/s3/s3.go	0.00% <0.00%> (ø)
pkg/gateway/vald/handler/grpc/handler.go	0.00% <0.00%> (ø)
internal/db/storage/blob/s3/reader/reader.go	97.72% <33.33%> (-2.28%)	⬇️
internal/db/storage/blob/s3/reader/option.go	100.00% <100.00%> (ø)
internal/net/net.go
internal/worker/worker.go	83.33% <0.00%> (+1.04%)	⬆️

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[rinx]

vald/charts/vald/values.yaml

Lines 1250 to 1254 in d262d39

	# @schema {"name": "agent.ngt.distance_type", "type": "string", "enum": ["l1", "l2", "angle", "hamming", "cos", "cosine", "normalizedangle", "normalizedcosine"]}
	# agent.ngt.distance_type -- distance type.
	# it should be `l1`, `l2`, `angle`, `hamming`, `cosine`, `normalizedangle` or `normalizedcosine`.
	# for further details: https://github.com/yahoojapan/NGT/wiki/Command-Quick-Reference
	distance_type: l2

please update here.

[kpango]

@rinx fixed

[kpango]

@rinx sorry I also updated docs agent-on-docker.md

[rinx]

seems okay.