'Active transactions' diaporamas de présentation

Zephyr: Live Migration in Shared Nothing Databases for Elastic Cloud Platforms

Zephyr: Live Migration in Shared Nothing Databases for Elastic Cloud Platforms. Aaron J. Elmore, Sudipto Das , Divyakant Agrawal , Amr El Abbadi Distributed Systems Lab University of California Santa Barbara. Cloud Application Platforms. Serve thousands of applications (tenants)

573 views • 42 slides

Enterprise Database Systems Recovery Security and Authorization

Enterprise Database Systems Recovery Security and Authorization. Technological Educational Institution of Larissa in collaboration with Staffordshire University Larissa 2006. Dr. Georgia Garani garani@teilar.gr Dr. Theodoros Mitakos teo_ms@yahoo.com. Agenda. Recovery techniques

426 views • 42 slides

Enterprise Database Systems Recovery Security and Authorization

Enterprise Database Systems Recovery Security and Authorization. Technological Educational Institution of Larissa in collaboration with Staffordshire University Larissa 200 9. Dr. Georgia Garani Dr. Theodoros Mitakos teo_ms@yahoo.com. Agenda. Recovery techniques

394 views • 38 slides

Towards Junking the PBX: Deploying IP Telephony

Towards Junking the PBX: Deploying IP Telephony. Wenyu Jiang, Jonathan Lennox, Henning Schulzrinne and Kundan Singh Columbia University {wenyu,lennox,hgs,kns10}@cs.columbia.edu. We describe our departmental IP telephony installation. Outline. Introduction to IP telephony System architecture

420 views • 28 slides

Crash Recovery

Crash Recovery. John Ortiz. Review: The ACID properties. Atomicity: All actions in the transaction happen, or none happens Consistency: Transaction transforms DB from consistent states to consistent states Isolation: Execution of one transaction is isolated from that of other transactions

463 views • 25 slides

Low Cost Commit Protocols for Mobile Computing Environments

Low Cost Commit Protocols for Mobile Computing Environments. Marc Perron & Baochun Bai. Introduction. Introduction to Mobile Database Environment Commit Protocols Classical Two-Phase Commit Mobile Two-Phase Commit Optimistic Concurrency Control with Update Time Stamp

765 views • 22 slides

Failure Recovery

Failure Recovery. Checkpointing Undo/Redo Logging. Source: slides by Hector Garcia-Molina. Recovery is very, very SLOW !. Redo log: First T1 wrote A,B Last Record Committed a year ago Record (1 year ago) --> STILL, Need to redo after crash!!. Crash.

325 views • 22 slides

Rollback Segments

354 views • 20 slides

Assignment 6 - Solution Problem 1

Assignment 6 - Solution Problem 1 Suppose a transaction sets an intention-write lock on a file and later sets a write lock on a record of the file. Is it safe for the transaction to release the intention-write lock before it commits? Why?

197 views • 12 slides