{"id":155728,"date":"2003-01-01T00:00:00","date_gmt":"2003-01-01T00:00:00","guid":{"rendered":"https:\/\/new-cm-edgedigital.pages.dev\/en-us\/research\/msr-research-item\/the-btr-tree-path-defined-version-range-splitting-in-a-branched-and-temporal-structure\/"},"modified":"2018-10-16T20:05:37","modified_gmt":"2018-10-17T03:05:37","slug":"the-btr-tree-path-defined-version-range-splitting-in-a-branched-and-temporal-structure","status":"publish","type":"msr-research-item","link":"https:\/\/new-cm-edgedigital.pages.dev\/en-us\/research\/publication\/the-btr-tree-path-defined-version-range-splitting-in-a-branched-and-temporal-structure\/","title":{"rendered":"The BTR-Tree: Path-Defined Version-Range Splitting in a Branched and Temporal Structure"},"content":{"rendered":"<div class=\"asset-content\">\n<p>There are applications which require the support of temporal data with branched time evolution, called branched-and-temporal data. In a branched-and-temporal database, both historic versions and current versions are allowed to be updated. We present an access method, the BTR-Tree, for branched-and-temporal databases with reasonable space and access time tradeoff. It is an index structure based on the BT-Tree [5]. The BT-Tree always splits at a current version whenever a data page or an index page is full. The BTR-Tree is able to split at a previous version while still keeping the posting property that only one parent page needs to be updated. The splitting policy of the BTR-Tree is designed to reduce data redundancy in the structure introduced by branching. Performance results show that the BTR-Tree has better space efficiency and similar query efficiency than the BT-Tree, with no overhead in search and posting algorithm complexity.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>There are applications which require the support of temporal data with branched time evolution, called branched-and-temporal data. In a branched-and-temporal database, both historic versions and current versions are allowed to be updated. We present an access method, the BTR-Tree, for branched-and-temporal databases with reasonable space and access time tradeoff. It is an index structure based [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"Springer Verlag","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"SSTD Conference","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"","msr_number":"","msr_organization":"","msr_pages_string":"","msr_page_range_start":"","msr_page_range_end":"","msr_series":"","msr_volume":"","msr_copyright":"","msr_conference_name":"SSTD Conference","msr_doi":"","msr_arxiv_id":"","msr_s2_paper_id":"","msr_mag_id":"","msr_pubmed_id":"","msr_other_authors":"Linan Jiang, Betty Salzberg, Manuel 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