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  1. Debezium
  2. DBZ-349

Better support for large append-only tables by making the snapshotting process restartable

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Details

    • Feature Request
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Done
    • 0.5.2
    • 0.7.0
    • mysql-connector
    • None

    Description

      Currently, the snapshotting process is non-interruptible to ensure that snapshotting results in creating a consistent dump of the existing data in the tables before the CDC phase begins.

      This is appropriate in the general case, but for very large log-like tables, which are append-only, snapshotting can take a long time (several days in our case for some larger tables), and if this phase is interrupted, it has to be restarted from scratch.

      I propose to introduce the option to override the select statement issued during snapshotting. This way it is possible to resume a snapshot that has progressed to a specific point (e.g. by adding a custom WHERE clause with a condition on the record ID).

      I have implemented a patch for this feature, for which I'd like to create a pull request.

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              Unassigned Unassigned
              ainagy Andras Istvan Nagy (Inactive)
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                Updated:
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