AI / Apache Paimon Interview questions
What are the consistency guarantees Paimon provides for writers?
Paimon writers use a two-phase commit protocol to atomically commit a batch of records to a table, so a snapshot either fully appears or doesn't appear at all — readers never see a half-written commit.
For concurrency between writers: two writers modifying different partitions at the same time can commit fully in parallel. Two writers modifying the same partition only get snapshot isolation — the final table state may end up as a mix of both commits, but no individual change is lost.
Paimon writers commit a batch of records using:
Two writers committing to the SAME partition at the same time get:
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