Secrets of the OpenEdge RDBMS: Before-images, Checkpoints, Crashes - Wiki - OpenEdge RDBMS - Progress Community

Secrets of the OpenEdge RDBMS: Before-images, Checkpoints, Crashes

Secrets of the OpenEdge RDBMS: Before-images, Checkpoints, Crashes

In this talk we examine the "before-image file", what it's for, how it works, and how you can configure it properly. You might get answers to questions that have been troubling people for over 25 * 10-2 centuries:

Why doesn't the before-image file have before-images ?

Why aren't the data on disk ever current when the database is being used?

What are checkpoints ?

Why do we have them ?

When your system crashes (and they all do eventually) how can the RDBMS recreate all the data that were lost in the crash and restore your database to a consistent state?

224_bi_checkpoints_crashes_v03.pdf

Comments
  • Hello Gus,Thank you, this is really a good presentation.Regards,Kaan