AI / Apache Paimon Interview questions
When should you choose Postpone Bucket mode?
Postpone Bucket mode is for a specific pattern: you want records to land quickly with low latency, but you don't yet want to pay the cost of actually deciding buckets and merging primary key data. Records are written to a special bucket = -2 placeholder area immediately, and the real bucketing and merging is deferred to a separate, later compaction job.
CREATE TABLE my_table ( pk BIGINT PRIMARY KEY NOT ENFORCED, v STRING ) WITH ( 'bucket' = '-2' );
This suits pipelines where write throughput and latency matter more upstream than immediate query-time consistency — for example, landing a huge volume of raw CDC events fast, then running a scheduled batch job to organize and merge them into their final bucketed form during off-peak hours.
Postpone Bucket mode is set by configuring bucket to:
Postpone Bucket mode is a good fit when:
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