DATAllegro (TM) Incorporated, founded in 2003 and based in Aliso Viejo, California, develops turnkey data warehouse appliances. The firm's systems are built with commodity components. They employ Linux and other open source software. The company is known for its RAIDW (TM), Ultra-Shared Nothing (TM), and Direct Data Streaming (TM) technologies. RAIDW optimizes data input-output (I/O) processing. It also includes integrated fault tolerance features. The Ultra-Shared Nothing (USN) parallel database technology optimizes co-located joins across nodes, accelerating query processing. Direct Data Streaming (DDS) provides users with sequential I/O data access query processing. DATAllegro is known for its DATAllegro P2 (TM) high-performance data warehouse appliance. It handles 2TB of data. The DATAllegro P5 appliance handles 5TB of data. It can be extended with optional indexing features. DATAllegro C25 (TM) appliance handles 25TB of data. Multiple DATAllegro C25 appliances can be integrated. The DATAllegro P2e (TM), DATAllegro P5e (TM), and C25 e (TM) appliances include encryption features. DATAllegro's DATAllegro IQR (TM) provides users with query routing features. The company's systems provide users with ad hoc query features. The systems support multiple concurrent users. DATAllegro has formed partnerships with Western Digital (R), Intel (R), Mellanox (R), and Novell (R). It has raised over $22 million in funding from Adams Capital Management Incorporated, Palomar Ventures, Venrock Associates, and Intel Capital. DATAllegro was founded by Stuart Frost and Mark Thacker.