عنوان المقالة:تحديد أماكن منابع البيانات وأمثلة الاستعلامات الموزعة في بيئة ند لند (P2P) Localisation de sources de données et optimisation de requêtes réparties en environnement pair-à-pair
In our thesis, we propose an approach for processing SQL queries in a P2P environment. To
solve the semantic heterogeneity between local schemas, our approach is based on domain ontology
and on similarity formulas. As for the structural heterogeneity of local schemas, it is solved by the
extension of a query routing method (i.e. Chord protocol) with Structure Indexes. Concerning the
query optimization problem, we propose to take advantage of the data source localization phase to
obtain all metadata required for generating a close to optimal execution plan. Finally, in order to show
the feasibility and the validity of our propositions, we carry out performance evaluations and we
discuss the obtained results
د. رداد الكنج | Raddad Al King, PhD | 8586