Just in time indexing for up to the second search

Abstract

E-commerce and intranet search systems require newly arriving content to be indexed and made available for search within minutes or hours of arrival. Applications such as file system and email search demand even faster turnaround from search systems, requiring new content to become available for search almost instantaneously. However, incrementally updating inverted indices, which are the predominant datastructure used in search engines, is an expensive operation that most systems avoid performing at high rates.