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MPI-INF D5 Publications :: Thesis :: Schenkel, Ralf

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Thesis - Doctoral dissertation | @PhdThesis | Doktorarbeit

Author(s)*:Schenkel, Ralf
BibTeX citekey*:Schenkel2001

Title, School
Title*:Transaktionen in föderierten Datenbanksystemen unter eingeschränkten Isolation Levels
School:Universität des Saarlandes
Type of Thesis*:Doctoral dissertation

Note, Abstract, Copyright
LaTeX Abstract:Atomicity and isolation of transactions are key requirements of advanced applications in federated systems consisting of distributed and heterogeneous components. While all existing federated systems support atomicity using the two-phase commit protocol, they lack support for federated concurrency control. Many possible solutions have been proposed in the literature, but they failed to make impact on real systems because they

completely ignored the widely used concept of isolation levels, which offer optimization options to applications at the cost of less rigorous control over data consistency.

This thesis compares existing definitions for isolation levels and develops a new characterization for Snaphot Isolation, an isolation level provided by Oracle, the market leader in the database field. We present algorithms for federated concurrency control that provably guarantee the correct execution of federated transactions even under local Snapshot Isolation, and discuss isolation levels for federated transactions. The algorithms are integrated into a federated system prototype. Performance measurements with this prototype show the practical viability of the developed methods.

Keywords:Transaction, Isolation Level, Snapshot Isolation, CORBA, OTS
Download Access Level:Public
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Referees, Status, Dates
1. Referee:Gerhard Weikum
2. Referee:Wolfgang Paul
Date Kolloquium:21 December 2001
Chair Kolloquium:Reinhard Wilhelm

MPG Unit:Max-Planck-Institut für Informatik
MPG Subunit:AG5
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BibTeX Entry:
AUTHOR = {Schenkel, Ralf},
TITLE = {Transaktionen in f{\"o}derierten Datenbanksystemen unter eingeschr{\"a}nkten Isolation Levels},
SCHOOL = {Universit{\"a}t des Saarlandes},
YEAR = {2001},
TYPE = {Doctoral dissertation}
MONTH = {December},

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Entry last modified by Petra Schaaf, 03/08/2005
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Ralf Schenkel
11/20/2003 03:54:26 PM

Petra Schaaf
Ralf Schenkel
Ralf Schenkel

Edit Dates
08.03.2005 13:05:54
21.11.2003 09:50:09
20.11.2003 15:54:26