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[{"authors":null,"categories":null,"content":"I am a Fixed-term Researcher at the Department of Engineering “Enzo Ferrari”, where I am also part of Database Group (DBGroup).\nMy research interests lie in the area of data integration and big data management.\n","date":-62135596800,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":-62135596800,"objectID":"2525497d367e79493fd32b198b28f040","permalink":"","publishdate":"0001-01-01T00:00:00Z","relpermalink":"","section":"authors","summary":"I am a Fixed-term Researcher at the Department of Engineering “Enzo Ferrari”, where I am also part of Database Group (DBGroup).\nMy research interests lie in the area of data integration and big data management.","tags":null,"title":"Luca Gagliardelli","type":"authors"},{"authors":["Sania Aftar","Luca Gagliardelli","Amina El Ganadi","Federico Ruozzi","Sonia Bergamaschi"],"categories":[],"content":"","date":1704067200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1720443836,"objectID":"161e280fc960f63de0e4a8a86b009fa4","permalink":"http://www.lucagagliardelli.com/publication/dblp-confircdl-aftar-ggrb-24/","publishdate":"2024-07-08T13:03:55.105438Z","relpermalink":"/publication/dblp-confircdl-aftar-ggrb-24/","section":"publication","summary":"","tags":[],"title":"A Novel Methodology for Topic Identification in Hadith","type":"publication"},{"authors":["Luca Gagliardelli","George Papadakis","Giovanni Simonini","Sonia Bergamaschi","Themis Palpanas"],"categories":[],"content":"","date":1704067200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1720443831,"objectID":"4d72d3156a0e48ddcf9033829f89a31d","permalink":"http://www.lucagagliardelli.com/publication/dblp-journalsis-gagliardelli-psbp-24/","publishdate":"2024-07-08T13:03:50.345787Z","relpermalink":"/publication/dblp-journalsis-gagliardelli-psbp-24/","section":"publication","summary":"","tags":[],"title":"GSM: A generalized approach to Supervised Meta-blocking for scalable entity resolution","type":"publication"},{"authors":["Adeel Aslam","Giovanni Simonini","Luca Gagliardelli","Luca Zecchini","Sonia Bergamaschi"],"categories":[],"content":"","date":1704067200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1720444115,"objectID":"83b711df4f4f97c290210c45414e0272","permalink":"http://www.lucagagliardelli.com/publication/aslam-2024102425/","publishdate":"2024-07-08T13:08:33.787446Z","relpermalink":"/publication/aslam-2024102425/","section":"publication","summary":"Inequality join is an operator to join data on inequality conditions and it is a fundamental building block for applications. While methods and optimizations exist for efficient inequality join in batch processing, little attention has been given to its streaming version, particularly to large-scale data-intensive applications that run on Distributed Stream Processing Systems (DSPSs). Designing an inequality join in streaming and distributed settings is not an easy task: (i) indexes have to be employed to efficiently support inequality-based comparisons, but the continuous stream of data imposes continuous insertions, updates, and deletions of elements in the indexes—hence a huge overhead for the DSPSs; (ii) oftentimes real data is skewed, which makes indexing even more challenging. To address these challenges, we propose the Stream-Aware inequality join (STA), an indexing method that can reduce redundancy and index update overhead. STA builds a separate in-memory index structure for hotkeys, i.e., the most frequently used keys, which are automatically identified with an efficient data sketch. On the other hand, the cold keys are treated using a linked set of index structures. In this way, STA avoids many superfluous index updates for frequent items. Finally, we implement four state-of-the-art inequality join solutions for a widely employed DSPS (Apache Storm) and compare their performance with STA on four real-world data sets and a synthetic one. The results of our experimental evaluation reveal that our stream-aware approach outperforms existing solutions.","tags":["Distributed stream processing system","Inequality join","Btree indexing","Augmented sketch","Skewed data distribution"],"title":"Stream-aware indexing for distributed inequality join processing","type":"publication"},{"authors":["Luca Gagliardelli","Luca Zecchini","Luca Ferretti","Domenico Beneventano","Giovanni Simonini","Sonia Bergamaschi","Mirko Orsini","Luca Magnotta","Emma Mescoli","Andrea Livaldi"," others"],"categories":[],"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1673862669,"objectID":"74a78c2a85bf951f8df0f0afabad4ec8","permalink":"http://www.lucagagliardelli.com/publication/gagliardelli-2023-big/","publishdate":"2023-01-16T09:51:08.647626Z","relpermalink":"/publication/gagliardelli-2023-big/","section":"publication","summary":"","tags":[],"title":"A big data platform exploiting auditable tokenization to promote good practices inside local energy communities","type":"publication"},{"authors":["Sonia Bergamaschi","Luca Gagliardelli"],"categories":[],"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1720443829,"objectID":"0af0cec5560dfcfd0c36f5ad027bb184","permalink":"http://www.lucagagliardelli.com/publication/dblp-confbigdataconf-bergamaschi-g-23/","publishdate":"2024-07-08T13:03:46.229438Z","relpermalink":"/publication/dblp-confbigdataconf-bergamaschi-g-23/","section":"publication","summary":"","tags":[],"title":"A Big Data Platform for the Management of Local Energy Communities Data","type":"publication"},{"authors":["Luca Gagliardelli","George Papadakis","Giovanni Simonini","Sonia Bergamaschi","Themis Palpanas"],"categories":[],"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1697440584,"objectID":"df54129f998567c74c30caa3846d7552","permalink":"http://www.lucagagliardelli.com/publication/dblp-confsebd-gagliardelli-0-sb-23/","publishdate":"2023-10-16T07:16:24.365699Z","relpermalink":"/publication/dblp-confsebd-gagliardelli-0-sb-23/","section":"publication","summary":"","tags":[],"title":"A general approach to Supervised Meta-Blocking","type":"publication"},{"authors":["Luca Gagliardelli","Domenico Beneventano","Marco Esposito","Luca Zecchini","Giovanni Simonini","Sonia Bergamaschi","Fabio Miselli","Giuseppe Calogero Miano"],"categories":[],"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1720443834,"objectID":"6c970af3685110c8f12c9770538ee585","permalink":"http://www.lucagagliardelli.com/publication/dblp-journalscorrabs-2312-12902/","publishdate":"2024-07-08T13:03:53.519177Z","relpermalink":"/publication/dblp-journalscorrabs-2312-12902/","section":"publication","summary":"","tags":[],"title":"DXP: Billing Data Preparation for Big Data Analytics","type":"publication"},{"authors":["Angelo Mozzillo","Luca Zecchini","Luca Gagliardelli","Adeel Aslam","Sonia Bergamaschi","Giovanni Simonini"],"categories":[],"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1720443833,"objectID":"e85f9649ae6ab7de64eff19b56e3dc88","permalink":"http://www.lucagagliardelli.com/publication/dblp-journalscorrabs-2312-11122/","publishdate":"2024-07-08T13:03:52.038307Z","relpermalink":"/publication/dblp-journalscorrabs-2312-11122/","section":"publication","summary":"","tags":[],"title":"Evaluation of Dataframe Libraries for Data Preparation on a Single Machine","type":"publication"},{"authors":["Adeel Aslam","Giovanni Simonini","Luca Gagliardelli","Angelo Mozzillo","Sonia Bergamaschi"],"categories":[],"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1697440584,"objectID":"f31fe105153840832000d431e10f332d","permalink":"http://www.lucagagliardelli.com/publication/dblp-confdawak-aslam-sgmb-23/","publishdate":"2023-10-16T07:16:23.708311Z","relpermalink":"/publication/dblp-confdawak-aslam-sgmb-23/","section":"publication","summary":"","tags":[],"title":"HKS: Efficient Data Partitioning for Stateful Streaming","type":"publication"},{"authors":["Domenico Beneventano","Sonia Bergamaschi","Luca Gagliardelli","Francesco Guerra","Maurizio Vincini"],"categories":[],"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1697440644,"objectID":"5dacb18107011ec2806cc6a3d5c207c3","permalink":"http://www.lucagagliardelli.com/publication/basidati-2023/","publishdate":"2023-10-16T07:17:23.714477Z","relpermalink":"/publication/basidati-2023/","section":"publication","summary":"","tags":[],"title":"Progetto di Basi di Dati Relazionali","type":"publication"},{"authors":[],"categories":null,"content":"","date":1662616080,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1662616080,"objectID":"eb7ca127e6bed0c9c6039765ab83f13c","permalink":"http://www.lucagagliardelli.com/talk/generalized-supervised-meta-blocking-@-vldb-2022/","publishdate":"2022-09-08T05:48:00Z","relpermalink":"/talk/generalized-supervised-meta-blocking-@-vldb-2022/","section":"event","summary":"Presentation of \"Generalized Supervised Meta-blocking\" paper at VLDB 2022.","tags":[],"title":"Generalized Supervised Meta-blocking @ VLDB 2022","type":"event"},{"authors":[],"categories":null,"content":"","date":1648554900,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1648554900,"objectID":"a422385dbc14dbdb0b083e0f31466b0a","permalink":"http://www.lucagagliardelli.com/talk/ecdp-@-dataplat-2022/","publishdate":"2022-03-29T11:55:00Z","relpermalink":"/talk/ecdp-@-dataplat-2022/","section":"event","summary":"Presentation of \"ECDP: A Big Data Platform for the Smart Monitoring of Local Energy Communities\" paper at DataPlat 2022.","tags":[],"title":"ECDP @ DataPlat 2022","type":"event"},{"authors":["Luca Gagliardelli","Luca Zecchini","Domenico Beneventano","Giovanni Simonini","Sonia Bergamaschi","Mirko Orsini","Luca Magnotta","Emma Mescoli","Andrea Livaldi","Nicola Gessa","Piero De Sabbata","Gianluca D'Agosta","Fabrizio Paolucci"],"categories":[],"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1663769746,"objectID":"6d8d7f647e34d236c8541b09c493df25","permalink":"http://www.lucagagliardelli.com/publication/dblp-confedbt-gagliardelli-zbs-22/","publishdate":"2022-09-21T14:15:45.995014Z","relpermalink":"/publication/dblp-confedbt-gagliardelli-zbs-22/","section":"publication","summary":"","tags":[],"title":"ECDP: A Big Data Platform for the Smart Monitoring of Local Energy Communities","type":"publication"},{"authors":["Luca Gagliardelli","George Papadakis","Giovanni Simonini","Sonia Bergamaschi","Themis 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