DBZ-1082 Add docs for write_recovery snapshot mode #241
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This adds details for the write_recovery snapshot mode as well as a concise description of how it works and it's limitations. See the issue for the linked code changes.
addisonj
pushed a commit
to instructure/debezium
that referenced
this pull request
Jan 16, 2019
This commit adds a new snapshot mode to postgres connector, WRITE_RECOVERY, which is intended to allow the user to recover the writes in the event of a lost postgres replication slot. This works by keeping track of the "catalog_xmin" from the replication slot and then using this to find any records that may have changed in the event of losing a slot by searching for records only more recent than the last known `catalog_xmin` See the docs PR for more details: debezium/debezium.github.io#241 Just to re-iterate on the limitations of this: - It only gurantees you see the latest version of `INSERT` and `UPDATE` opreations, `DELETE` may still be missed - It may miss intermediate row states, in the event of multiple changes to a row during the time period we are recovering from
|
Hey @addisonj, I'm going to close this one for the time being, as per our discussion on the PR in core and the different route this should take. Thanks a lot for your efforts and looking forward to the new SPI-based approach. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This adds details for the write_recovery snapshot mode as well as a
concise description of how it works and it's limitations.
See the issue for the linked code changes.