Goldstar Logo
Your Source for PSQL Database Products, Services and Training Since 1997 EMail: Sales@goldstarsoftware.com 
Phone: 1-708-647-7665 
Web Site Login 
Free PSQL Support
Quick Links
Database Engines
+ Actian Zen v13
+ Actian PSQL v13
+ Actian PSQL v12
+ Actian PSQL v11
+ Pervasive PSQL v10
+ Pervasive PSQL v9
+ Pervasive.SQL V8
+ Pervasive.SQL 2000i
+ Pervasive.SQL 7
+ Btrieve v12
+ Btrieve 6.15

+ Data Protection Products

+ Goldstar Software Services

+ Goldstar Software Tools

+ Other Solutions

AMS Users: Click Me Fix My PSQL License Repair PSQL Files Get Support Now Join Our Mailing List

Navigation Background

Sidebar: Continuous Operations Mode In a Nutshell

The Btrieve 6.15 and MicroKernel database engines support the use of continuous operations mode for files. This mode, usually activated by the BUTIL -STARTBU command on the server, is used to allow the backup of open Btrieve files.

First, the engine freezes a data file in its current state and reopens it in a shared, read-only mode so that the backup software can easily access it. Then, the engine creates and opens a delta file, with a ^^^ extension, to which all new or changed pages are written. When data is read from the file, the engine checks the delta file first to see if an updated page is available. If a new page is not found, the page is retrieved from the main data file instead.

When the files are removed from continuous mode, the changed pages are committed back to the primary file, and the delta files are deleted.

Return to Main Article
  Copyright © 1997-2017, Goldstar Software Inc., All rights reserved. PRODUCTS | SERVICES | TRAINING | SUPPORT | DOWNLOADS | ABOUT US  
Goldstar Software Inc. | 3007 Carmel Dr | Flossmoor IL 60422 Legal Statements | EULAs | Uninstall | Privacy Statements | Contact Us