Veritas-bu

[Veritas-bu] Incrementals between classes

2001-09-23 14:13:31
Subject: [Veritas-bu] Incrementals between classes
From: lists AT deiknumi DOT com (Andre Stemmet)
Date: Sun, 23 Sep 2001 12:13:31 -0600
Hi All,

I have two classes backing up overlapping data on several Windows 2000 
Servers.  One goes to a tape drive/robot with a long retention time and the 
other to a local hard drive with short a retention time.

For Example:

Class = WinDataDisk
File List = C:\, D:\, E:\ 
Schedule = FULL, run Weekly, retain 2 weeks
Schedule = INCR, run Daily, retain 1 week

Class = WinDataTape
File List = C:\, D:\, F:\ 
Schedule = FULL, run Weekly, retain 3 months
Schedule = CINCR, run every 3 Days, retain 2 months
Schedule = INCR, run daily, retain 1 month

I have turned off the Perform Incrementals Based on Archive Bit setting on 
the client.

The question is will NetBackup do the incrementals for WinDataTape based on 
backups that ran for WinDataDisk of solely based on WinDataTape.

Tanks for your help.
Andre

------------------

On page 478 of the NetBackup DataCenter System Administrator s Guide - 
Windows NT/2000 (page 516 of the PDF) it says

Determining Files Due for Backup

Windows NT/2000 Clients On Windows NT/2000 clients, NetBackup performs 
incremental backups of files based on the Perform Incrementals Based on 
Archive Bit setting in the NetBackup Configuration dialog box. To open this 
dialog box, start the client-user interface on the client, click Configure on 
the Actions menu, and go to the General tab. If the Perform incrementals 
based on archive bit box is checked, incrementals for this client are based 
on the state of each file s archive bit. The operating system sets the bit 
whenever a file is changed and it remains set until cleared by NetBackup. The 
conditions under which NetBackup clears the bit, depends on the type of 
backup being performed. u For a full backup, NetBackup backs up files 
regardless of the state of their archive bit. After a full backup, the 
archive bit is always cleared. u For a differential-incremental backup, 
NetBackup backs up files that have the archive bit set and have therefore 
been changed. When the client receives a response from the server indicating 
that the backup was successful (or partially successful) the archive bits are 
cleared. This allows the next differential incremental to back up only files 
that have changed since the previous full or differential-incremental backup. 
u For a cumulative-incremental backup, NetBackup backs up files that have the 
archive bit set, but does not clear the archive bits after the backup. This 
allows the next cumulative incremental to back up not only changed files, but 
also files that were in this cumulative incremental. If the Perform 
Incrementals Based on Archive Bit box is clear, NetBackup includes a file in 
an incremental backup only if the file's datetime stamp has been changed 
since the last backup. The datetime stamp indicates when the file was last 
backed up. u For a full backup, NetBackup backs up files regardless of the 
datetime stamp. u For a differential-incremental backup, NetBackup compares 
the file's datetime stamp against the last full or incremental backup. u For 
a cumulative-incremental backup, NetBackup compares the file's datetime stamp 
against the last full backup. If you install or copy files from another 
computer, the new files retain the datetime stamp of the originals. If the 
original date is before the last backup date on this computer, then the new 
files are not be backed up until the next full backup.

-- 
Andre Stemmet
stemmet AT deiknumi DOT com

The information contained in this message may be incorrect and cause you to 
spill your coffee, harm your dog or loose all your data.  You have been 
warned.

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