migrate_concurrently.rb

class MigrateConcurrently
  DELAY_BETWEEN_CYCLES_IN_SECONDS = 3
  MAX_CYCLES = 100

  def initialize; end

  def perform
    Logger.info(
      ...
      delay_between_cycles_in_seconds: DELAY_BETWEEN_CYCLES_IN_SECONDS,
    )

    sleep DELAY_BETWEEN_CYCLES_IN_SECONDS
    ...
  end

  private

  def cycles
    @cycles ||= Cycles.new(max: MAX_CYCLES)
  end
end