Đang chuẩn bị liên kết để tải về tài liệu:
NiagaraCQ: A Scalable Continuous Query System for Internet Databases

Không đóng trình duyệt đến khi xuất hiện nút TẢI XUỐNG Tải xuống

Continuous queries are persistent queries that allow users to receive new results when they become available. While continuous query systems can transform a passive web into an active environment, they need to be able to support millions of queries due to the scale of the Internet. No existing systems have achieved this level of scalability. NiagaraCQ addresses this problem by grouping continuous queries based on the observation that many web queries share similar structures. Grouped queries can share the common computation, tend to fit in memory and can reduce the I/O cost significantly. Furthermore, grouping on selection predicates can eliminate a large number of unnecessary query invocations. Our grouping technique is distinguished.