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Namespaces

M3DB uses the concept of namespaces to determine how metrics are stored and retained. The M3DB operator allows a user to define their own namespaces, or to use a set of presets we consider to be suitable for production use cases.

Namespaces are configured as part of an m3dbcluster spec.

Presets

10s:2d

This preset will store metrics at 10 second resolution for 2 days. For example, in your cluster spec:

spec:
...
  namespaces:
  - name: metrics-short-term
    preset: 10s:2d

1m:40d

This preset will store metrics at 1 minute resolution for 40 days.

spec:
...
  namespaces:
  - name: metrics-long-term
    preset: 1m:40d

Custom Namespaces

You can also define your own custom namespaces by setting the NamespaceOptions within a cluster spec. The API lists all available fields. As an example, a namespace to store 7 days of data may look like:

...
spec:
...
  namespaces:
  - name: custom-7d
    options:
      bootstrapEnabled: true
      flushEnabled: true
      writesToCommitLog: true
      cleanupEnabled: true
      snapshotEnabled: true
      repairEnabled: false
      retentionOptions:
        retentionPeriod: 168h
        blockSize: 12h
        bufferFuture: 20m
        bufferPast: 20m
        blockDataExpiry: true
        blockDataExpiryAfterNotAccessPeriod: 5m
      indexOptions:
        enabled: true
        blockSize: 12h