... 5(i)
shows the optimization time for a star query of size 10 for
various values of parameter for WAN (similar trends are
observed for LAN). We intentionally chose a large query for
IDP, since for smaller ... transformation [2],
as well as federated query processing and optimization.
The queryoptimization work goes back as far as the early
distributed databasesystems (R*, SDD-1, Distributed In-
gres [22, 14, ... estimates.
2.1. The Federated QueryOptimization Problem
The federated queryoptimization problem is to find an
execution plan for a user-specified query that satisfies an
optimization goal provided...
... management systems such as:
Oracle’s DistributedDatabase Architecture
1-2
Oracle8 DistributedDatabase Systems
Oracle’s DistributedDatabase Architecture
A distributeddatabase is a set of databases ... discusses pure distributed databases.
Distributed Database A distributeddatabase is a set of databases stored
on multiple computers that appears to applica-
tions as a single database.
Distributed ... user at the local database.
Oracle’s DistributedDatabase Architecture
1-4
Oracle8 DistributedDatabase Systems
The Network
To link the individual databases of a distributeddatabase system,...
... Versions 1-7
Distributed Databases and Distributed Processing 1-7
Distributed Databases and Database Replication 1-7
Heterogeneous Distributed Databases 1-8
Heterogeneous Services 1-8
Heterogeneous ... <
operator
>
y
[AND ]
Oracle’s DistributedDatabase Architecture
1-2
Oracle8 DistributedDatabase Systems
Oracle’s DistributedDatabase Architecture
A distributeddatabase is a set of databases stored on ... database
access.
Databases and Database Links
Each database in a distributeddatabase is distinct from all other databases in the
system and has its own global database name. Oracle forms a database s...
... schema architecture, database de-
sign, query processing and optimization,
transaction management, and distributed
database management.
Characteristics of DatabaseSystems
Systems consisting ...
Query optimi-
zation for CODASYL database systems. In Pro-
ceedings of the ACM SZGMOD Conference,
pp. 13&156.
DAYAL, U., AND HWANG, H. 1984. View definition
and generalization fordatabase ... re-
formatting), and exception handling. The
commands for the local systems can be
embedded in the DOL programs that are
forwarded to the local systems and executed
under local control.
Query...
... Descriptors
C.2.4 [Distributed Systems] : Distributed databases;
H.2.4 [Database Management]: Systems concurrency, distributed
databases, transaction processing
General Terms
Algorithms, Design, Performance, ... Section
9.
2. DETERMINISTIC DATABASE SYSTEMS
In traditional (System R*-style) distributeddatabase systems, the
primary reason that an agreement protocol is needed when commit-
ting a distributed transaction ... transaction re-
quests for each epoch. Calvin’s current implementation uses Zoo-
Keeper, a highly reliable distributed coordination service often used
by distributeddatabasesystemsfor heartbeats,...
... parametric ODE solver
ã Multiple local solutions – a need for global optimization
3
Global Optimizationfor Parameter Estimation of
Dynamic Systems
Youdong Lin and Mark A. Stadtherr
Department of ... Acknowledgments
ã A deterministic global optimization approach based on interval analysis can
be used to estimate the parameters of dynamic systems
ã A validated solver for parametric ODEs is used to construct ... = Approximate CPU time adjusted for machine used based on SPEC
benchmarks
∗
Does not provide rigorous guarantee of global optimality.
17
Validated Solutions for Parametric ODEs (Contd)
ã Example...
... parametric ODE solver
ã Multiple local solutions – a need for global optimization
3
Validated Solutions for Parametric ODEs
ã Consider the IVP for the parametric ODEs
˙
y = f (y, θ), y(t
0
) = y
0
, ... 2.6557 ì 10
3
ã Results: 359 iterations and 14.3 CPU seconds
16
Global Optimizationfor Parameter Estimation of
Dynamic Systems
Youdong Lin and Mark A. Stadtherr
Department of Chemical and Biomolecular ... Acknowledgments
ã A deterministic global optimization approach based on interval analysis can
be used to estimate the parameters of dynamic systems
ã A validated solver for parametric ODEs is used to construct...
... Semantic Overlay Networks for P2P Sys-
tems. Stanford Technical Report
11. Deshpande A, Hellerstein JM, (2002) Decoupled QueryOptimizationfor Fed-
erated Database Systems. In Proceedings of ... bases offered by SWIM [8].
2.4 Query Planning and Execution
Query planning in SQPeer is responsible for generating a distributed query
plan according to the localization information returned by the ... is performed as in Chord
by searching for each value of the query and combining the results at the peer
launching the initial query. This approach ignores RDF/S schema information
during query...
... Language for Expert Systems:
Comparisons with DatabaseSystems
Kathleen R. McKeown
Department of Computer Science
Columbia University
New York, N.Y. 10027
1
Introduction
Do natural language database ... the database
system.
We are currently working on natural language
for expert systems at Columbia and thus, expert
systems provide a natural alternative environment to
compare against the database ... which the user has for how the goal is
to be satisfied. Furthermore, the user has the
responsibility for determining what information is
needed to solve the problem and for producing the
final...
... Pub., San Mateo, CA (1991).
[DG92] D. DeWitt and J. Gray. “Parallel Database Systems: The
Future of High Performance Database Systems. ” In Communi-
cations of the ACM, Vol. 35, No. 6, June 1992.
[GL01] ... Dynamic Race Detector for Multi-
Threaded Programs.” In Proc. SOSP-16, pp. 27-37, 1997.
[Sel88] T. K. Sellis. “Multiple Query Optimization. ” In ACM
Transactions on Database Systems, 13(1):23-52, ... broad scope of research in
databases, operating systems, and computer architecture.
Parallel databasesystems [DG92][CHM95] exploit
the inherent parallelism in a relational query execution
plan and...