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Content Provider | ACM Digital Library |
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Author | Curmei, Mihaela Clemmer, Alex Hopcroft, Michael He, Yuxiong Elnikety, Sameh Goodwin, Bob Luu, Dan |
Abstract | Since the mid-90s there has been a widely-held belief that signature files are inferior to inverted files for text indexing. In recent years the Bing search engine has developed and deployed an index based on bit-sliced signatures. This index, known as BitFunnel, replaced an existing production system based on an inverted index. The driving factor behind the shift away from the inverted index was operational cost savings. This paper describes algorithmic innovations and changes in the cloud computing landscape that led us to reconsider and eventually field a technology that was once considered unusable. The BitFunnel algorithm directly addresses four fundamental limitations in bit-sliced block signatures. At the same time, our mapping of the algorithm onto a cluster offers opportunities to avoid other costs associated with signatures. We show these innovations yield a significant efficiency gain versus classic bit-sliced signatures and then compare BitFunnel with Partitioned Elias-Fano Indexes, MG4J, and Lucene. |
Starting Page | 605 |
Ending Page | 614 |
Page Count | 10 |
File Format | |
ISBN | 9781450350228 |
DOI | 10.1145/3077136.3080789 |
Language | English |
Publisher | Association for Computing Machinery (ACM) |
Publisher Date | 2017-08-07 |
Publisher Place | New York |
Access Restriction | Subscribed |
Subject Keyword | Intersection Inverted indexes Query processing Search engines Bloom filters Bitvector Signature files Bit-sliced signatures |
Content Type | Text |
Resource Type | Article |
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