range_deletion_task.idl

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# This file defines the format of documents stored in config.rangeDeletions. Each document
# represents a chunk range to be deleted by the CollectionRangeDeleter.

global:
    cpp_namespace: "mongo"

imports:
    - "mongo/idl/basic_types.idl"
    - "mongo/s/sharding_types.idl"
    - "mongo/db/logical_session_id.idl"
    - "mongo/s/chunk_range.idl"

enums:
    CleanWhen:
        description: "When to cleanup ranges."
        type: string
        values:
            kNow: "now"
            kDelayed: "delayed"

structs:
    rangeDeletionTask:
        description: "Represents a chunk range to be deleted by the range deleter."
        strict: false
        fields:
            _id:
                type: uuid
                description: "A unique identifier for the migration."
                cpp_name: id
            nss:
                type: namespacestring
                description: "The namespace of the collection that the chunk belongs to."
            collectionUuid:
                type: uuid
                description: "The UUID of the collection that the chunk belongs to."
            donorShardId:
                type: shard_id
                description: "The shard from which the chunk was migrated."
            range:
                type: chunk_range
                description: "The range to be deleted."
            pending:
                type: bool
                description: "Flag that is present if the range is not yet ready for deletion"
                optional: true
            processing:
                type: optionalBool
                description: "Flag that is present if the range is currently being deleted"
            whenToClean:
                type: CleanWhen
                description: "Enumeration that defines when to cleanup the range."
            timestamp:
                type: timestamp
                description: "The timestamp the task was created."
                optional: true
            numOrphanDocs:
                type: safeInt64
                description: "The estimated number of orphaned documents in the range"
                default: 0