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Document Description
Title
A
transaction
execution
model
for
mobile
computing
environments
Author
Momin
,
Kaleem
A.
,
1973-
Description
Thesis
(M.Sc.)--Memorial
University
of
Newfoundland
,
2000.
Computer
Science
Date
1999
Pagination
viii, 106 leaves : ill., maps.
Subject
Mobile
computing;
Transaction
systems
(Computer
systems);
Computer
multitasking
Degree
M.Sc.
Degree Grantor
Memorial University of Newfoundland. Dept. of Computer Science
Discipline
Computer Science
Language
Eng
Notes
Bibliography:
leaves
97-106.
Abstract
A
mobile
computing
environment
is
characterized
by
limited
execution
capability
at the
mobile
hosts
,
low
bandwidth
and the
relatively
high
costs
of
wireless
connection
, and
frequent
disconnections
and
mobility
of the
mobile
hosts.
Such
an
environment
naturally
suggests
an
optimistic
mode
of
execution
,
where
the
mobile
host
caches
data
and
does
the
computation
in
disconnected
mode
and
, on
reconnection
, the
transaction
is
either
committed
or
aborted
based
on the
current
values
in the
fixed
network.
--
We
propose
a
new
transaction
execution
model
,
based
on
optimistic
concurrency
control
mechanism
,
which
dynamically
adjusts
the
transaction
execution
status
at the
mobile
host
to be
consistent
with the
database
state
on the
mobile
support
station.
This
increases
the
possibility
of the
transaction
to
commit
successfully
and
hence
makes
the
computation
on the
mobile
host
more
meaningful.
A
detailed
algorithm
is
presented
and its
adaptability
to
various
aspects
of the
mobile
environment
discussed.
--
We
further
strengthen
the
computation
at the
mobile
host
by
facilitating
partial
guarantee
against
invalidation.
This
is
accomplished
by
using
a
flexible
concurrency
control
scheme
which
integrates
optimistic
and
pessimistic
approaches
to
access
data
items
based
on
Read/Write
and
Write/Write-conflicts.
Type
Text
Resource Type
Electronic
thesis
or
dissertation
Format
Image/jpeg;
Application/pdf
Source
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier
a1476103
Rights
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
Collection
Electronic
Theses
and
Dissertations
Scanning Status
Completed
PDF File
(30.31
MB)
--
http://collections.mun.ca/PDFs/theses/Momin_KaleemA.pdf
CONTENTdm file name
279183.cpd
