The Snapshot Index, an I/O-Optimal Access Method for Timeslice Queries

The Snapshot Index, an I/O-Optimal Access Method for Timeslice Queries (1995)

Cached

Download Links

[www.cs.ucr.edu]

by Vassilis J. Tsotras , Nickolas Kangelaris

Venue:	Information Systems, An International Journal
Citations:	44 - 15 self

Versions

Version History

Metadata Version 1

Datum	Value	Source
TITLE	The Snapshot Index, an I/O-Optimal Access Method for Timeslice Queries	INFERENCE
AUTHOR NAME	Vassilis J. Tsotras	SVM HeaderParse 0.2
AUTHOR AFFIL	Department of Computer Science	SVM HeaderParse 0.2
AUTHOR ADDR	Polytechnic University Brooklyn, NY 11201, USA	SVM HeaderParse 0.2
AUTHOR NAME	Nickolas Kangelaris	SVM HeaderParse 0.2
AUTHOR AFFIL	Department of Computer Science	SVM HeaderParse 0.2
AUTHOR ADDR	Polytechnic University Brooklyn, NY 11201, USA	SVM HeaderParse 0.2
ABSTRACT	Abstract- We present an access method for timeslice queries that reconstructs a past state s(t) of a time-evolving collection of objects, in O(log,, n + Is(t)l/b) I/O ‘8, where Is(t)1 denotes the size of the collection at time t, n is the total number of changes in the collection’s evolution and b is the size of an I/O transfer. Changes include the addition, deletion or attribute modification of objects; they are assumed to occur in increasing time order and always affect the most current state of the collection (thus our index supports transaction-time.) The space used is 0 n/b) while the update processing is constant per change, i.e., independent of n. This is the first I I O-optimal access method for this problem using O(n/b) space and O(1) updating (in the expected amortized sense due to the use of hashing.) This performance is also achieved for interval intersection temporal queries. An advantage of our approach is that its performance can be tuned to match particular application needs (trading space for query time and vice versa). In addition, the Snapshot Index can naturally migrate data on a write-once optical medium while maintaining the same performance bounds.	SVM HeaderParse 0.2
YEAR	1995	INFERENCE
VENUE	Information Systems, An International Journal	INFERENCE
VENUE TYPE	JOURNAL	INFERENCE
CITATIONS	32 found	ParsCit 1.0