Transaction Processing: Concepts and Techniques
Transaction Processing: Concepts and Techniques
XMLTM: efficient transaction management for XML documents
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Notes on Data Base Operating Systems
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ACM SIGMOD Record
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Don't be a Pessimist: Use Snapshot based Concurrency Control for XML
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Data & Knowledge Engineering - Special issue: ER 2003
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Optimizing lock protocols for native XML processing
Data & Knowledge Engineering
Tailor-made lock protocols and their DBMS integration
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Verifying parameterized taDOM+ lock managers
SOFSEM'08 Proceedings of the 34th conference on Current trends in theory and practice of computer science
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BNCOD'05 Proceedings of the 22nd British National conference on Databases: enterprise, Skills and Innovation
SXDGL: snapshot based concurrency control protocol for XML data
XSym'07 Proceedings of the 5th international conference on Database and XML Technologies
The Real Performance Drivers behind XML Lock Protocols
DEXA '09 Proceedings of the 20th International Conference on Database and Expert Systems Applications
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Fine-grained lock protocols with lock modes and lock granules adjusted to the various XML processing models, allow for highly concurrent transaction processing on XML trees, but require locking facilities that efficiently support large and deep hierarchies with varying fan-out characteristics. We discuss these and also further requirements like prefix-based node labels, and present a lock management design that fulfills all these requirements and allows us to perfectly exploit the advantages of our tailor-made lock protocols for XML trees. Our design also supports the flexible use of heuristics for dynamic lock escalation to enhance workload adaptivity. Benchmark runs convincingly illustrate flexibility and performance benefits of this approach and reveal that careful lock protocol optimization pays off.