Page History

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• CDC application works as a separate process.
• CDC relies on the existing Ignite mechanism - WAL.
• IEP Scope - deliver local WAL data change events to a local consumer.
• CDC keeps consumer offset in a special file.
  WAL process will start from this offset on restart.
• To prevent interference between the WAL archive process and CDC Ignite will create a hard link to the newly created segment in a special folder.
  After success processing, CDC will delete this link.
  Note, data will be removed from the disk only after CDC and Ignite will remove the link to a segment from both corresponding folders.
• To manage minimal event gap new configuration timeout introduced - WalForceArchiveTimeout.
• Flag to distinguish DataEntry on primary and backup nodes introduced.

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