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How do you choose a partitioning and clustering strategy for a large analytics table?

Partition on the wrong key and you get millions of tiny files or skewed giants. The signal is partitioning on a low-cardinality filter, clustering within partitions on the next predicate, and watching file size.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Partition on the wrong key and you get millions of tiny files or skewed giants. The signal is partitioning on a low-cardinality filter, clustering within partitions on the next predicate, and watching file size.

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