Propriedades de inicialização
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Visão geral
Use as seguintes definições de configuração para configurar a inicialização do conector de origem MongoDB Kafka para converter coleções MongoDB em Alterar eventos de Stream.
Dica
Para obter um exemplo usando a funcionalidade de copiar dados existentes, consulte o exemplo de uso de copiar dados existentes .
Para obter uma lista de definições de configuração do conector de origem organizadas por categoria, consulte o guia sobre Propriedades de configuração do conector de origem.
Configurações
Nome | Descrição | |
|---|---|---|
startup.mode | Type: string Description: Specifies how the connector should start up when there is no
source offset available. Resuming a change stream requires a
resume token, which the connector gets from the source offset.
If no source offset is available, the connector may either
ignore all or some of the existing source data, or may at first
copy all existing source data and then continue with processing
new data. If startup.mode=latest, the connector ignores all existing
source data.If startup.mode=timestamp, the connector
actuates startup.mode.timestamp.* properties. If no
properties are configured, timestamp is equivalent to
latest.If startup.mode=copy_existing, the connector
copies all existing source data to Change Stream events. This
setting is equivalent to the deprecated setting copy.existing=true.Se algum sistema alterar os dados no banco de dados enquanto o conector de origem converte dados existentes dele, o MongoDB poderá produzir eventos de fluxo de alterações duplicados para refletir as alterações mais recentes. Como os eventos de fluxo de alterações nos quais a cópia de dados depende são idempotentes, os dados copiados são eventualmente consistentes. Default: latestAccepted Values: latest, timestamp, copy_existing | |
startup.mode.timestamp.start.at.operation.time | Type: string Description: Actuated only if startup.mode=timestamp. Specifies the
starting point for the change stream.To learn more about Change Stream parameters, see
$changeStream (aggregation)
in the MongoDB manual. Default: ""Accepted Values:
| |
startup.mode.copy.existing.namespace.regex | Type: string Description: Regular expression the connector uses to match namespaces from
which to copy data. A namespace describes the MongoDB database name
and collection separated by a period (for example, databaseName.collectionName).For example, the following regular-expression setting matches
collections that start with "page" in the stats database:The \ character in the example above escapes the . character
that follows it in the regular expression. For more information on
how to build regular expressions, see
Patterns
in the Java API documentation.Default: ""Accepted Values: A valid regular expression | |
startup.mode.copy.existing.pipeline | Type: string Description: An inline array of pipeline operations
the connector runs when copying existing data. You can use this
setting to filter the source collection and improve the use of
indexes in the copying process. For example, the following setting uses the $match
aggregation operator to instruct the connector to copy only
documents that contain a closed field with a value of false.Default: ""Accepted Values: Valid aggregation pipeline stages | |
startup.mode.copy.existing.max.threads | Type: int Description: The maximum number of threads the connector can use to copy data. Default: number of processors available in the environment Accepted Values: An integer | |
startup.mode.copy.existing.queue.size | Type: int Description: The size of the queue the connector can use when copying data. Default: 16000Accepted Values: An integer | |
startup.mode.copy.existing.allow.disk.use | Type: boolean Description: When set to true, the connector uses temporary disk storage
for the copy existing aggregation.Default: trueAccepted Values: true or false |