Goetz Graefe, Wey Guy, Caetano Sauer

Instant Recovery with Write-Ahead Logging (eBook, PDF)

• Format: PDF

Produktbeschreibung

Traditional theory and practice of write-ahead logging and of database recovery techniques revolve around three failure classes: transaction failures resolved by rollback; system failures (typically software faults) resolved by restart with log analysis, “redo,” and “undo” phases; and media failures (typically hardware faults) resolved by restore operations that combine multiple types of backups and log replay. The recent addition of single-page failures and single-page recovery has opened new opportunities far beyond its original aim of immediate, lossless repair of single-page wear-out in novel or traditional storage hardware. In the contexts of system and media failures, efficient single-page recovery enables on-demand incremental “redo” and “undo” as part of system restart or media restore operations. This can give the illusion of practically instantaneous restart and restore: instant restart permits processing new queries and updates seconds after system reboot and instant restorepermits resuming queries and updates on empty replacement media as if those were already fully recovered. In addition to these instant recovery techniques, the discussion introduces much faster offline restore operations without slowdown in backup operations and with hardly any slowdown in log archiving operations. The new restore techniques also render differential and incremental backups obsolete, complete backup commands on the database server practically instantly, and even permit taking full backups without imposing any load on the database server. Table of Contents: Preface / Acknowledgments / Introduction / Related Prior Work / Single-Page Recovery / Applications of Single-Page Recovery / Instant Restart after a System Failure / Single-Pass Restore / Applications of Single-Pass Restore / Instant Restore after a Media Failure / Multiple Failures / Conclusions / References / Author Biographies

Produktdetails

• Verlag: Morgan & Claypool / Springer International Publishing
• Erscheinungstermin: 10. November 2022
• Englisch
• ISBN-13: 9783031018527
• Artikelnr.: 72191185

Autorenporträt

Goetz Graefe has been a professor, product architect, and industrial researcher since 1987. Like other database vendors, Microsoft SQL Server adopted his designs for query optimization and query execution. He has published tutorial surveys on query execution, sorting, b-tree indexing, concurrency control, logging and recovery, as well as numerous novel techniques and research results in query processing and transactional data storage. Wey Guy is an independent software engineer. She earned a Master's degree in computer science from the University of Iowa and spent 15 years with Microsoft's SQL Server development team before she became an independent software developer in 2011. She has been working with Hewlett Packard Labs since 2012. Caetano Sauer is a doctoral candidate in computer science at the Technical University of Kaiserslautern, Germany. He earned his M.Sc. degree in 2012 at the same institution. While his interests and experience cover all components of transactional storageand indexing, his research focuses on logging and recovery algorithms. He is advised by Prof. Theo Harder and Dr. Goetz Graefe.

Inhaltsangabe

Preface.- Acknowledgments.- Introduction.- Related Prior Work.- Single-Page Recovery.- Applications of Single-Page Recovery.- Instant Restart after a System Failure.- Single-Pass Restore.- Applications of Single-Pass Restore.- Instant Restore after a Media Failure.- Multiple Failures.- Conclusions.- References.- Author Biographies .