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# Copyright (C) 2020-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.
#
# This file defines the format of documents stored in config.reshardingOperations on the config
# server.
global:
cpp_namespace: "mongo"
imports:
- "mongo/s/resharding/common_types.idl"
structs:
DonorShardEntry:
description: "Represents a donor shard for a particular resharding operation on the
coordinator."
generate_comparison_operators: false
# Use strict:false to avoid complications around upgrade/downgrade. This isn't technically
# required for resharding because durable state from all resharding operations is cleaned up
# before the upgrade or downgrade can complete.
strict: false
fields:
id: shard_id
# We intentionally have the mutable state nested in a subobject to make it easy to
# overwrite with a single $set.
mutableState: DonorShardContext
RecipientShardEntry:
description: "Represents a recipient shard for a particular resharding operation on the
coordinator."
generate_comparison_operators: false
# Use strict:false to avoid complications around upgrade/downgrade. This isn't technically
# required for resharding because durable state from all resharding operations is cleaned up
# before the upgrade or downgrade can complete.
strict: false
fields:
id: shard_id
# We intentionally have the mutable state nested in a subobject to make it easy to
# overwrite with a single $set.
mutableState: RecipientShardContext
ReshardingCoordinatorMetrics:
description: "Contains metrics about the resharding operation on the coordinator."
strict: false
fields:
operationRuntime:
type: ReshardingMetricsTimeInterval
description: >-
The time interval of the entire resharding operation on the coordinator.
optional: true
documentCopy:
type: ReshardingMetricsTimeInterval
description: >-
The time interval that it takes to clone documents on this coordinator.
optional: true
oplogApplication:
type: ReshardingMetricsTimeInterval
description: >-
The time interval that it takes to apply oplog entries on this coordinator.
optional: true
ReshardingCoordinatorDocument:
description: "Represents a resharding operation on the coordinator."
inline_chained_structs: true
chained_structs:
CommonReshardingMetadata: CommonReshardingMetadata
ReshardingApproxCopySize: ReshardingApproxCopySizeStruct
AbortReason: AbortReasonStruct
generate_comparison_operators: false
# Use strict:false to avoid complications around upgrade/downgrade. This isn't technically
# required for resharding because durable state from all resharding operations is cleaned up
# before the upgrade or downgrade can complete.
strict: false
fields:
state: CoordinatorState
cloneTimestamp:
type: timestamp
description: "The timestamp for the snapshot read while cloning from the donors."
optional: true
donorShards:
type: array<DonorShardEntry>
description: "The list of all donor shards for this resharding operation."
recipientShards:
type: array<RecipientShardEntry>
description: "The list of all recipient shards for this resharding operation."
zones:
type: array<ReshardingZoneType>
description: "The zones associated with the new shard key."
optional: true
numInitialChunks:
type: long
description: "The number of chunks the new collection should have after resharding."
optional: true
presetReshardedChunks:
type: array<ReshardedChunk>
description: >-
Mapping of chunk ranges to be used as the initial split output. This is only
for testing purposes.
optional: true
active:
type: bool
description: >-
Dummy field that always has the same value (true) to have a unique
index on in order to prevent multiple resharding operations from being active at
the same time.
default: true
metrics:
type: ReshardingCoordinatorMetrics
description: "Metrics related to the coordinator."
optional: true
shardDistribution:
type: array<ShardKeyRange>
description: "The key ranges for the new shard key. This should be continuous and complete."
optional: true
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