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Eduardo Gutarra

dblp:117/3592 · DBLP profile ↗
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1ranked-venue papers
0as first author
0since 2021 · last 2012
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Databases, data management, data science and information retrieval · 1

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Computer architecture, parallel and distributed computing, and storage systems
1 paper
Storage systems · 100%
Databases, data mining, and information retrieval
1 paper
Indexing and storage engines · 100%

Topics — the 4 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Storage systems
data compression
0.112012
Reordering rows for better compression: Beyond the lexicographic order · ACM Trans. Database Syst. 2012
Storage systems › data compression
run-length coding
0.112012
Reordering rows for better compression: Beyond the lexicographic order · ACM Trans. Database Syst. 2012
Indexing and storage engines
column store
0.012012
Reordering rows for better compression: Beyond the lexicographic order · ACM Trans. Database Syst. 2012
Indexing and storage engines
data compression
0.012012
Reordering rows for better compression: Beyond the lexicographic order · ACM Trans. Database Syst. 2012

Methods — techniques the papers use, named apart from their topics

vortex · 0.3traveling salesman heuristic · 0.3nearest neighbor · 0.3multiple lists · 0.3
YearPublicationVenuePosition
2012 Reordering rows for better compression: Beyond the lexicographic order
abstract
Sorting database tables before compressing them improves the compression rate. Can we do better than the lexicographical order? For minimizing the number of runs in a run-length encoding compression scheme, the best approaches to row-ordering are derived from traveling salesman heuristics, although there is a significant trade-off between running time and compression. A new heuristic, Multiple Lists, which is a variant on Nearest Neighbor that trades off compression for a major running-time speedup, is a good option for very large tables. However, for some compression schemes, it is more important to generate long runs rather than few runs. For this case, another novel heuristic, Vortex, is promising. We find that we can improve run-length encoding up to a factor of 3 whereas we can improve prefix coding by up to 80%: these gains are on top of the gains due to lexicographically sorting the table. We prove that the new row reordering is optimal (within 10%) at minimizing the runs of identical values within columns, in a few cases.
Daniel Lemire, Owen Kaser, Eduardo Gutarra
ACM Trans. Database Syst.3