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path: root/src/mongo/db/snapshot_window_options.idl
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# Copyright (C) 2018-present MongoDB, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the Server Side Public License, version 1,
# as published by MongoDB, Inc.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# Server Side Public License for more details.
#
# You should have received a copy of the Server Side Public License
# along with this program. If not, see
# <http://www.mongodb.com/licensing/server-side-public-license>.
#
# As a special exception, the copyright holders give permission to link the
# code of portions of this program with the OpenSSL library under certain
# conditions as described in each individual source file and distribute
# linked combinations including the program with the OpenSSL library. You
# must comply with the Server Side Public License in all respects for
# all of the code used other than as permitted herein. If you modify file(s)
# with this exception, you may extend this exception to your version of the
# file(s), but you are not obligated to do so. If you do not wish to do so,
# delete this exception statement from your version. If you delete this
# exception statement from all source files in the program, then also delete
# it in the license file.
#

global:
  cpp_namespace: "mongo"
  cpp_includes:
    - "mongo/db/snapshot_window_options.h"

imports:
  - "mongo/idl/basic_types.idl"

server_parameters:
  maxTargetSnapshotHistoryWindowInSeconds:
    description: "Maximum target snapshot history window, in seconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.maxTargetSnapshotHistoryWindowInSeconds"
    validator: { gte: 0 }

  cachePressureThreshold:
    description: "Cache pressure threshold"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.cachePressureThreshold"
    validator:
      gte: 0
      lte: 100

  snapshotWindowMultiplicativeDecrease:
    description: "Snapshot window multiplicative decrease"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.snapshotWindowMultiplicativeDecrease"
    validator:
      gt: 0.0
      lt: 1.0

  snapshotWindowAdditiveIncreaseSeconds:
    description: "Snapshot window multiplicative increase, in seconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.snapshotWindowAdditiveIncreaseSeconds"
    validator: { gte: 1 }

  minMillisBetweenSnapshotWindowInc:
    description: "Minimum duration between snapshot window increment, in milliseconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.minMillisBetweenSnapshotWindowInc"
    validator: { gte: 1 }

  minMillisBetweenSnapshotWindowDec:
    description: "Minimum duration between snapshot window decrement, in milliseconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.minMillisBetweenSnapshotWindowDec"
    validator: { gte: 1 }

  checkCachePressurePeriodSeconds:
    description: "Check cache pressure period, in seconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.checkCachePressurePeriodSeconds"
    validator: { gte: 1 }