Cuckoo Trie: Exploiting Memory-Level Parallelism for Efficient DRAM Indexing
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We present the Cuckoo Trie, a fast, memory-efficient ordered index structure. The Cuckoo Trie is designed to have memory-level parallelism – which a modern out-of-order processor can exploit to execute DRAM accesses in parallel – without sacrificing memory efficiency. The Cuckoo Trie thus breaks a fundamental performance barrier faced by current indexes, whose bottleneck is a series of dependent pointer-chasing DRAM accesses – e.g., traversing a search tree path – which the processor cannot parallelize. Our evaluation shows that the Cuckoo Trie outperforms state-of-the-art-indexes by up to 20 variety of datasets and workloads, typically with a smaller or comparable memory footprint.
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