Achieving Convergence with Operational Transformation in Distributed Groupware Systems
Identifieur interne : 007091 ( Main/Exploration ); précédent : 007090; suivant : 007092Achieving Convergence with Operational Transformation in Distributed Groupware Systems
Auteurs : Abdessamad Imine [France] ; Pascal Molli [France] ; Gérald Oster [France] ; Michaël Rusinowitch [France]Source :
English descriptors
Abstract
Distributed groupware systems provide computer support for manipulating shared objects by dispersed users. Data replication is used in such systems in order to improve the availability of data. This potentially leads to divergent (or different) replicas. In this respect, the Operational Transformation (OT) approach is employed to maintain convergence of all replicas, all users view the same object. Using this approach, users can exchange their updates in any order since the convergence should be ensured in all cases. However, designing correct OT algorithms is still an open issue. In this paper, we demonstrate that recent OT algorithms are incorrect. We analyse the source of this problem and we propose a generic solution with its formal correctness.
Url:
Affiliations:
- France
- Franche-Comté, Grand Est, Lorraine (région)
- Belfort, Besançon, Nancy
- Institut national polytechnique de Lorraine, Université Nancy 2, Université de Bourgogne Franche-Comté, Université de Franche-Comté, Université de Lorraine, Université de technologie de Belfort-Montbéliard
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Le document en format XML
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key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-866" type="direct"><org type="laboratory" xml:id="struct-866" status="VALID"><idno type="IdRef">152639071</idno><idno type="RNSR">200412232H</idno><orgName>Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies</orgName><orgName type="acronym">FEMTO-ST</orgName><desc><address><addrLine>32 avenue de l'Observatoire 25044 BESANCON CEDEX</addrLine><country key="FR"></country></address><ref type="url">http://www.femto-st.fr</ref></desc><listRelation><relation active="#struct-242365" type="direct"></relation><relation active="#struct-300261" type="direct"></relation><relation active="#struct-300360" type="direct"></relation><relation name="UMR6174" active="#struct-441569" type="direct"></relation></listRelation></org></tutelle><tutelle active="#struct-242365" type="indirect"><org type="institution" xml:id="struct-242365" status="VALID"><idno type="IdRef">026403188</idno><idno type="ISNI">0000 0001 2188 3779 </idno><orgName>Université de Franche-Comté</orgName><orgName type="acronym">UFC</orgName><desc><address><country key="FR"></country></address><ref type="url">http://www.univ-fcomte.fr</ref></desc></org></tutelle><tutelle active="#struct-300261" type="indirect"><org type="institution" xml:id="struct-300261" status="VALID"><orgName>Université de Technologie de Belfort-Montbeliard</orgName><orgName type="acronym">UTBM</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300360" type="indirect"><org type="institution" xml:id="struct-300360" status="VALID"><orgName>Ecole Nationale Supérieure de Mécanique et des Microtechniques</orgName><orgName type="acronym">ENSMM</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle name="UMR6174" active="#struct-441569" type="indirect"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle><tutelle active="#struct-2496" type="direct"><org type="laboratory" xml:id="struct-2496" status="OLD"><orgName>INRIA Lorraine</orgName><desc><address><addrLine>615 rue du Jardin Botanique 54600 Villers-lès-Nancy</addrLine><country key="FR"></country></address><ref type="url">http://www.inria.fr/centre-de-recherche-inria/nancy-grand-est</ref></desc><listRelation><relation active="#struct-300009" type="direct"></relation></listRelation></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Nancy</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Université Nancy 2</orgName><orgName type="institution" wicri:auto="newGroup">Université de Lorraine</orgName><placeName><settlement type="city">Nancy</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Institut national polytechnique de Lorraine</orgName><orgName type="institution" wicri:auto="newGroup">Université de Lorraine</orgName><placeName><settlement type="city" wicri:auto="siege">Besançon</settlement><region type="region" nuts="2">Franche-Comté</region></placeName><orgName type="university">Université de Franche-Comté</orgName><orgName type="institution" wicri:auto="newGroup">Université de Bourgogne Franche-Comté</orgName><placeName><settlement type="city" wicri:auto="siege">Belfort</settlement><region type="region" nuts="2">Franche-Comté</region></placeName><orgName type="university">Université de technologie de Belfort-Montbéliard</orgName></affiliation></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>convergence</term><term>distributed systems</term><term>operational transformation</term><term>optimistic replication</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Distributed groupware systems provide computer support for manipulating shared objects by dispersed users. Data replication is used in such systems in order to improve the availability of data. This potentially leads to divergent (or different) replicas. In this respect, the Operational Transformation (OT) approach is employed to maintain convergence of all replicas, all users view the same object. Using this approach, users can exchange their updates in any order since the convergence should be ensured in all cases. However, designing correct OT algorithms is still an open issue. In this paper, we demonstrate that recent OT algorithms are incorrect. We analyse the source of this problem and we propose a generic solution with its formal correctness.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Franche-Comté</li><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Belfort</li><li>Besançon</li><li>Nancy</li></settlement><orgName><li>Institut national polytechnique de Lorraine</li><li>Université Nancy 2</li><li>Université de Bourgogne Franche-Comté</li><li>Université de Franche-Comté</li><li>Université de Lorraine</li><li>Université de technologie de Belfort-Montbéliard</li></orgName></list><tree><country name="France"><region name="Grand Est"><name sortKey="Imine, Abdessamad" sort="Imine, Abdessamad" uniqKey="Imine A" first="Abdessamad" last="Imine">Abdessamad Imine</name></region><name sortKey="Molli, Pascal" sort="Molli, Pascal" uniqKey="Molli P" first="Pascal" last="Molli">Pascal Molli</name><name sortKey="Oster, Gerald" sort="Oster, Gerald" uniqKey="Oster G" first="Gérald" last="Oster">Gérald Oster</name><name sortKey="Rusinowitch, Michael" sort="Rusinowitch, Michael" uniqKey="Rusinowitch M" first="Michaël" last="Rusinowitch">Michaël Rusinowitch</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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