Nimble Serial - Number Lookup

Nimble systems often use : a hash index in L2 for exact SN lookups, and a B-tree in L3 for rare prefix queries. 4.2 Nimble Lookup Pseudocode def nimble_sn_lookup(sn: str, context: RequestContext) -> AssetRecord: # L1: Local cache (per process) record = local_cache.get(sn) if record: return record # L2: Distributed cache (Redis) record = redis_cluster.get(sn) if record: local_cache.set(sn, record, ttl=5) return record

# L3: Persistent storage (with consistent hashing to shard) shard = get_shard_by_sn(sn) record = db_shards[shard].get(sn) if record: # Write-back to L2 and L1 asynchronously async_write_through(sn, record) return record else: # False positive from BF; log and continue raise NotFound() Scenario: A consumer electronics company stores 200 million warranty records, each with an SN (format: 4-letter brand code + 8 alphanumeric). Peak load: 80,000 lookups/second (e.g., during Black Friday returns). nimble serial number lookup

# Bloom filter check (negative avoidance) if not bloom_filter.might_contain(sn): raise NotFound("SN not in any known set") Nimble systems often use : a hash index

Nimble systems often use : a hash index in L2 for exact SN lookups, and a B-tree in L3 for rare prefix queries. 4.2 Nimble Lookup Pseudocode def nimble_sn_lookup(sn: str, context: RequestContext) -> AssetRecord: # L1: Local cache (per process) record = local_cache.get(sn) if record: return record # L2: Distributed cache (Redis) record = redis_cluster.get(sn) if record: local_cache.set(sn, record, ttl=5) return record

# L3: Persistent storage (with consistent hashing to shard) shard = get_shard_by_sn(sn) record = db_shards[shard].get(sn) if record: # Write-back to L2 and L1 asynchronously async_write_through(sn, record) return record else: # False positive from BF; log and continue raise NotFound() Scenario: A consumer electronics company stores 200 million warranty records, each with an SN (format: 4-letter brand code + 8 alphanumeric). Peak load: 80,000 lookups/second (e.g., during Black Friday returns).

# Bloom filter check (negative avoidance) if not bloom_filter.might_contain(sn): raise NotFound("SN not in any known set")