Grim View Source

Grim is a pruning library that periodically destroys stale records that are no longer useful.

After installing Grim, add the Grim.ReaperSupervisor to your supervision tree with a list of schemas or queries that you would like to delete.

  grim_config = [
    repo: MyApp.Repo,
    reapers: [Soul, Chaff, Spirit]
  ]

  children =
  [
    {Grim.ReaperSupervisor, grim_config}
  ]

The reaper supervisor can be initialized in 4 different ways.

  1. A list of Schemas, if you would like to use the default pruning values
  grim_config = [
    repo: Repo,
    reapers: [Soul, Chaff, Spirit]
  ]
  1. A list of Schema tuples with configuration options

      grim_config = [
        repo: Repo,
        reapers: [{Soul, [ttl: 10_000]}, {Chaff, [poll_interval: 100]}, {Spirit, [batch_size: 10_000]}]
      ]
  2. With explicit reaper child specs

      grim_config = [
        repo: Repo,
        reapers: [{Reaper, [query: Soul, poll_interval: 100]}, {Reaper, [query: Chaff]}, {Reaper, [batch_size: 100]}]
      ]
  3. Or a combination of all of the above

      grim_config = [
        repo: Repo,
        reapers: [{Reaper, [query: Soul, poll_interval: 100]}, Chaff, {Spirit, [batch_size: 10_000]}]
      ]

The following configurations are available

:batch_size -> Number of records deleted at a time
:poll_interval -> How often grim should check for records to delete
:ttl -> How old should records be before they are deleted
:query -> An ecto Schema module name or an ecto query

Installation

Install by adding grim to your list of dependencies in mix.exs:

def deps do
  [
    {:grim, "~> 0.1.0"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/grim.