Replication - Revision history

Admin: Reverted edits by Eboxytezi (Talk) to last version by Jfromm

2011-02-11T21:44:35Z

Reverted edits by Eboxytezi (Talk) to last version by Jfromm

@@ Line 17: / Line 17: @@
 if at all.
->== References ==
+== References ==
-[http://portal.acm.org/citation.cfm?id=1057980&amp;dl=GUIDE&amp;coll=GUIDE Optimistic replication], Yasushi Saito and Marc Shapiro, ACM Computing Surveys (CSUR),  Volume 37, Issue 1 (March 2005)
+[http://portal.acm.org/citation.cfm?id=1057980&dl=GUIDE&coll=GUIDE Optimistic replication], Yasushi Saito and Marc Shapiro, ACM Computing Surveys (CSUR),  Volume 37, Issue 1 (March 2005)
 [[Category:Applied Principles]]

Eboxytezi at 00:24, 18 November 2010

2010-11-18T00:24:37Z

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Eboxytezi at 06:20, 15 November 2010

2010-11-15T06:20:04Z

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	if at all.		if at all.

	== References ==		>== References ==

	[http://portal.acm.org/citation.cfm?id=1057980&dl=GUIDE&coll=GUIDE Optimistic replication], Yasushi Saito and Marc Shapiro, ACM Computing Surveys (CSUR), Volume 37, Issue 1 (March 2005)		[http://portal.acm.org/citation.cfm?id=1057980&dl=GUIDE&coll=GUIDE Optimistic replication], Yasushi Saito and Marc Shapiro, ACM Computing Surveys (CSUR), Volume 37, Issue 1 (March 2005)

	[[Category:Applied Principles]]		[[Category:Applied Principles]]

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Jfromm: New page: '''Replication''' in computer science refers to the creation and the use of redundant resources, such as software or hardware components, to improve availability, reliability, [[Fault Tol...

2008-10-02T20:09:23Z

New page: '''Replication''' in computer science refers to the creation and the use of redundant resources, such as software or hardware components, to improve availability, reliability, [[Fault Tol...

New page

'''Replication''' in computer science refers to the creation and the use of redundant resources, such as
software or hardware components, to improve availability, reliability, [[Fault Tolerance|fault tolerance]], or performance.
Replication typically involves replication in space, in which the same application or data is stored on multiple
file systems or the same computing task is executed on multiple devices, or replication in time, in which
a computing task is executed repeatedly on a single device.

One can distinguish roughly between two types of replication

* '''Active Replication''' all replicas work productively, each replica plays the same role and is active in every operation
* '''Passive Replication''' only one replica works productively (the primary), the other replicas become active only if the primary fails

Strong usage of active replication increases of course the [[Redundancy|redundancy]] among the
active components of the systems, and leads therefore to a higher probability of inconsistencies
and consistency problems.
'''Optimistic replication''' tries to achieve a trade-off between high consistency and
low latency by assuming that problems and conflicts during updates will occur rarely,
if at all.

== References ==

[http://portal.acm.org/citation.cfm?id=1057980&dl=GUIDE&coll=GUIDE Optimistic replication], Yasushi Saito and Marc Shapiro, ACM Computing Surveys (CSUR), Volume 37, Issue 1 (March 2005)

[[Category:Applied Principles]]