98 citations · 585 across the 33 of their papers we have counts for
17 papers · 1 filter
SkyServer Traffic Report - The First Five Years
Vik Singh, Jim Gray, Ani Thakar +5
The SkyServer is an Internet portal to the Sloan Digital Sky Survey Catalog Archive Server. From 2001 to 2006, there were a million visitors in 3 million sessions generating 170 mi…
Cross-Matching Multiple Spatial Observations and Dealing with Missing Data
Jim Gray, Alex Szalay, Tamas Budavari +3
Cross-match spatially clusters and organizes several astronomical point-source measurements from one or more surveys. Ideally, each object would be found in each survey. Unfortunat…
The Zones Algorithm for Finding Points-Near-a-Point or Cross-Matching Spatial Datasets
Jim Gray, Maria A. Nieto-Santisteban, Alexander S. Szalay
Zones index an N-dimensional Euclidian or metric space to efficiently support points-near-a-point queries either within a dataset or between two datasets. The approach uses relatio…
Life Under Your Feet: An End-to-End Soil Ecology Sensor Network, Database, Web Server, and Analysis Service
Katalin Szlavecz, Andreas Terzis, Stuart Ozer +6
Wireless sensor networks can revolutionize soil ecology by providing measurements at temporal and spatial granularities previously impossible. This paper presents a soil monitoring…
Large-Scale Query and XMatch, Entering the Parallel Zone
Maria A. Nieto-Santisteban, Aniruddha R. Thakar, Alexander S. Szalay +1
Current and future astronomical surveys are producing catalogs with millions and billions of objects. On-line access to such big datasets for data mining and cross-correlation is u…
Empirical Measurements of Disk Failure Rates and Error Rates
Jim Gray, Catharine van Ingen
The SATA advertised bit error rate of one error in 10 terabytes is frightening. We moved 2 PB through low-cost hardware and saw five disk read error events, several controller fail…