Gigablast is a powerful, opensource, new search engine that does real-time indexing! Features Scalable to thousands of servers. Has scaled to over 12 billion web pages on over 200 servers. A dual quad core, with 32GB ram, and two 160GB Intel SSDs, running 8 Gigablast instances, can do about 8 qps (queries per second) on an index of 10 million pages. Drives will be close to maximum storage capacity. Doubling index size will more or less halve qps rate.