Networker

Re: [Networker] full versus level 1, etc?

2003-01-31 10:15:43
Subject: Re: [Networker] full versus level 1, etc?
From: Robert Maiello <robert.maiello AT MEDEC DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Fri, 31 Jan 2003 10:15:41 -0500
Wes,

Legato should put something in the docs about how Windows 2000's default
handling of the archive bit.   As we just found out.. if the archive bit
on a file is set (and the create and modification time have not been updated)
then the file will get backed up forever ..until a full backup resets the
bit.  This renders whatever level one specifies (1-9 anyway) meaningless
for files of this type.

All this talk of backup levels is good; but, this default behaviour in W2k
is counterintuitive and unlike other backup products.

Or perhaps I missed it in the docs.


Robert Maiello
Thomson Healthcare

On Thu, 30 Jan 2003 18:38:05 -0800, Wes Ono <wono AT LEGATO DOT COM> wrote:

>Jason,
>
>Thanks for noticing this.
>
>This has been corrected in the NetWorker Administrator's Guide for Windows,
>Version 6.2.  It is also corrected in the NetWorker 7.0 Administrator's
>Guides for both UNIX and Windows.
>
>Level X backs up changes since last level X-1 or lower.
>
>Wes
>
>-----Original Message-----
>From: Heller, Jason [mailto:Jason.Heller AT HARLEY-DAVIDSON DOT COM]
>Sent: Thursday, January 30, 2003 7:17 PM
>To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>Subject: Re: [Networker] full versus level 1, etc?
>
>
>Be careful though how you read the manual - look through the examples and
>pictures.
>If I am reading it correctly, there is conflicting statements.
>
>One statement in Table 47  is that a Level X backs up all changes since the
>last Level X or lower.
>One statement in Example 3 is that a Level X backs up all changes since the
>last Level X-1 or lower.
>
>I haven't tested, but I believe the latter is true - a Level X will backup
>all data changed since the last lower level (Level X-1), even if previous
>level X's exist.
>
>For example::
>        Day 1:  Level 0 (full) - will backup all files (full backup)
>        Day 2:  Level 5 - will backup all files since Day 1 (all files since
>the last level 0-4)
>        Day 3:  Level 5 - will backup all files since Day 1 again
>        Day 4:  Level 7 - will backup all files since Day 3
>        Day 5:  Level 3 - will backup all files since Day 1
>
>An incremental backup will, as always, backup all files since the last
>successful backup of any type (except manual?)
>
>Again, this is my understanding, please test in your environment before
>relying on these statements.
>
>-Jason-
>
>PS - here's a cut-and-paste from the manual:
>
>P.285, Table 47. Backup Levels
>
>Level [1 - 9] Backs up files that have changed since the last backup with a
>lower or
>equally numbered backup level. For example:
>
>        * A level 1 backup backs up all the files that have changed since
>the last full backup (considered a level zero).
>
>        * A level 3 backup backs up all the files that have changed since
>the last level 3 backup, level 2 backup, level 1 backup, or full backup.
>
>        * A level 9 backs up all the files that have changed since the last
>level 9, 8, 7, 6, 5, 4, 3, 2, 1, or full (0) backup.
>
>P. 288,
>Example: Backup Levels Part 3
>
>Continuing the example, in Figure 28 a level 5 backup on October 15 backs up
>all of the data that changed since the last lower-numbered backup.
>
>
>
>-----Original Message-----
>From: Byron Servies [mailto:bservies AT PACANG DOT COM]
>Sent: Thursday, January 30, 2003 10:57 AM
>To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>Subject: Re: [Networker] full versus level 1, etc?
>
>
>On January 30, 2003 at 12:22, Robert L. Harris wrote:
>> Anyone have a good breakdown on what the difference is between a level1,
>> a full, a level 9, etc?
>
>Hi,
>
>The Administrators Guide has a very good description,
>including decent pictures.
>
><http://web1.legato.com/infodev/publications/NetWorker/UNIX/6.1/uxag.pdf>
>
>Note that levels are not specific to version 6.1: it is just
>the most recent copy of the manual.
>
>HTH,
>
>Byron
>
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