خط مشی دسترسیدرباره ماپشتیبانی آنلاین
ثبت نامثبت نام
راهنماراهنما
فارسی
ورودورود
صفحه اصلیصفحه اصلی
جستجوی مدارک
تمام متن
منابع دیجیتالی
رکورد قبلیرکورد بعدی
Document Type:Latin Dissertation
Language of Document:English
Record Number:54420
Doc. No:TL24374
Call number:‭MR24791‬
Main Entry:Zeeshan Mohammad Sardar
Title & Author:Snapshot based concurrency control protocols for XMLZeeshan Mohammad Sardar
College:McGill University (Canada)
Date:2006
Degree:M.Sc.
student score:2006
Page No:102
Abstract:Currently, only few XML data management systems support concurrent access to an XML document, and if they do, they typically apply variations of locking to handle XML's nested structure. However, advanced query processing techniques use a wide range of indexes and allow for arbitrary navigation through the XML documents, making lock acquisition complex and potentially leading to high blocking rates. In this thesis, we suggest two concurrency control protocols that avoid any read locks by providing transactions a committed snapshot of the data. OptiX enhances traditional optimistic concurrency control to work on XML while SnaX offers snapshot isolation as provided by relational database systems like Oracle and Post-greSQL. We evaluate the performance of these two protocols on XML documents of different structure and on the XMark benchmark. For that purpose, we propose suitable update operations to serve as an extension to XMark which currently supports only queries.
Subject:Applied sciences; Computer science; 0984:Computer science
Added Entry:McGill University (Canada)