Caché High Availability Guide - InterSystems Documentation

once the backup has been started. You can obtain a more accurate estimate by preventingglobal updates while running ^DBSIZE, and then doing your backup before allowing globalupdates to resume.You can estimate the size of backups in two ways:• Run ^DBSIZE interactively• Call ^DBSIZE from a routineCaché Backup UtilitiesNote:A database must be in the list of selected databases to be backed up before you canevaluate it with DBSIZE.2.7.1.1 Run DBSIZE InteractivelyThe following procedure describes the steps necessary to run ^DBSIZE interactively:1.Do ^DBSIZE2. Caché displays the DBSIZE main menu:Incremental Backup Size EstimatorWhat kind of backup:1. Full backup of all in-use blocks2. Incremental since last backup3. Cumulative incremental since last full backup4. Exit the backup program1=>3. Select the type of backup for which you want an estimate: full, incremental, or cumulativeincremental.4. At the “Suspend Updates? Yes=>” prompt, either:Press Enter to suspend updates so that you get a more accurate estimate;orEnter No to continue updates5. Examine the results that are displayed.First, DBSIZE shows you how many Caché blocks you need to do the type of backupyou selected, for:• Each directory in the backup list• All directories in the backup list.Caché High Availability Guide 39