Parallel skyline computation on multicore architectures
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Parallel Skyline Computation on Multicore Architectures. ICDE`09. Outline. Introduction Preliminary Parallel BBS(branch-and-bound algorithm) Parallel Skyline Algorithm ( Pskyline ) Experiments Conclusion. Introduction. (cont.). The advantage of the skyline Skyline algorithm Sequential

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Parallel Skyline Computation on Multicore Architectures

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Parallel skyline computation on multicore architectures

Parallel Skyline Computation on Multicore Architectures

ICDE`09


Outline

Outline

  • Introduction

  • Preliminary

  • Parallel BBS(branch-and-bound algorithm)

  • Parallel Skyline Algorithm (Pskyline)

  • Experiments

  • Conclusion


Introduction

Introduction


Parallel skyline computation on multicore architectures

(cont.)

  • The advantage of the skyline

  • Skyline algorithm

    • Sequential

      • No index structure

        • BNL、SFS 、LESS

      • Index structure

        • NN 、BBS 、ZSHARE

    • Parallel

      • Many in Distributed environment, but no algorithm for multi-core environment


Prrliminary

Prrliminary

  • A. Skyline computation

    • For a d-dimensional dataset D.

      • skyline set :

      • Incomparable :

      • Transitivity :

      • Incomparability :

      • Distributivity :


Parallel skyline computation on multicore architectures

(cont.)

  • B.Skeletal parallel programming

    • A programming model

      • Need two component :

        • Data structure

          • List :

        • Parallel skeletons

          • not

        • For developing parallel skyline algorithm

          • Parallel map and Parallel reduce


Parallel skyline computation on multicore architectures

(cont.)

  • Pmap (parallel map)

A

B

C

D

E

F

G

H

A’

B’

C’

D’

E’

F’

G’

H’


Parallel skyline computation on multicore architectures

(cont.)

  • Preduce (parallel reduce)

A

B

C

D

E

F

G

H

A’

B’

C’

D’

……

R


Parallel bbs

Parallel BBS

  • A. branch-and-bound algorithm

    • Use R-tree as its index structure


Parallel skyline computation on multicore architectures

(cont.)

  • B.Parallelizing BBS


Parallel skyline algorithm pskyline

Parallel skyline algorithm (Pskyline)

  • Overall design

    • Pskyline D = S(D)

    • PskylineD = sreducepmerge (pmapsskyline L)

      • L = [D1,…,Db] D = D1++…++Db

  • Sreduce


Parallel skyline computation on multicore architectures

(cont.)

  • Pmerge

  • Sskyline


Experiments

Experiments


Parallel skyline computation on multicore architectures

(cont.)


Conclusion

Conclusion

  • Muliti-core architecture for database operations.


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