Changelog

Official M3 1.0 release candidate

1.0.0

Features

• M3DB: Namespace resolution and retention now configured dynamically via API and stored in etcd instead of being defined statically in M3Coordinator configuration.

message DatabaseCreateRequest {
  // ...

  // Optional aggregated namespace to create in 
  // addition to unaggregated namespace
  AggregatedNamespace aggregated_namespace = 8;
}

• M3DB: Minimal configuration file with default settings looks like:

coordinator: {}
db: {}

and includes common settings such as global query limits.

Backwards Incompatible Changes

Configuration

• M3DB: db.bootstrap.bootstrappers removed
• M3DB: db.config nested under db.discovery.config (discovery can optionally accept different types of defaults instead of a custom config)
• M3Coordinator: cluster.namespaces.storageMetricsType removed
• M3Coordinator: tagOptions.tagOptions no longer supports legacy type
• M3Query: limits.perQuery.maxComputedDatapoints removed
• M3Query: limits.perQuery.maxFetchedDatapoints removed
• M3Query: limits.global.maxFetchedDatapoints removed
• M3Query: cache removed
• M3Query: listenAddress changed to always be resolved as a string from config. Format changed from

listenAddress:
  config: "..."
  value: "..."

to

listenAddress: "..."

API

• M3DB: /services/m3db/database/config/bootstrappers dynamic bootstappers endpoint removed
• M3Coordinator: Removed deprecated URL /api/v1/namespace in favor of stable preferred URL /api/v1/services/m3db/namespace
• M3Coordinator: Removed deprecated URL /api/v1/namespace/init in favor of stable preferred URL /api/v1/services/m3db/namespace/init
• M3Coordinator: Removed deprecated URL /api/v1/namespace/unagg in favor of stable preferred URL /api/v1/services/m3db/namespace/unagg
• M3Coordinator: Removed deprecated URL /api/v1/placement in favor of stable preferred URL /api/v1/services/m3db/placement
• M3Coordinator: Removed deprecated URL /api/v1/placement/init in favor of stable preferred URL /api/v1/services/m3db/placement/init

Package

• github.com/m3db/m3/src/x/close removed in favor of github.com/m3db/m3/src/x/resource
• github.com/m3db/m3/src/dbnode/clock removed in favor of github.com/m3db/m3/src/x/clock
• github.com/m3db/m3/src/x/dice/dice.go moved to github.com/m3db/m3/src/dbnode/storage/dice.go
• github.com/m3db/m3/src/x/lockfile/lockfile.go moved to github.com/m3db/m3/src/dbnode/server/lockfile.go

Misc

• M3Query: Concept of data point limit enforcers removed in favor of the other remaining query limits (e.g. max series). This also removed metrics cost_reporter_datapoints, cost_reporter_datapoints_counter, and cost_reporter_over_datapoints_limit.
• Linter enabled