Abstract
We present the first parallel architecture for a dynamic approximate membership data-structure (i.e., a filter) that supports insertions, deletions, and approximate membership queries. Our architecture borrows techniques from PRAM emulation to obtain a parallel filter based on two levels of fingerprint-dictionaries. A key component in the architecture is a special-purpose wide-word processor we designed to support operations over small dictionaries. We implemented this architecture on an FPGA running at 100MHz. The implementation stores up to 1.44 million keys, has a false-positive rate less than 0.3%, receives batches 16 of operations per cycle, preserves sequential order, and runs with a stable throughput of over a billion operations per second with respect to several benchmarks.
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