Re: [Networker] How does NetWorker decide if a fil e has changed o r

Yes, we were getting incrementals that were as huge as the full backups.

Like Legato, we at first thought something like virus scanning was touching
all the files.   This was not the case.   We thought it was permission
changes but permissions were only changed on one night.

What we found was that if, for whatever reason; say a file was moved to the
machine; the archive bit is set.   The incremental backups we do on
weeknights would not  clear the archive bit. The level 9 backups we do on
weekends would also not reset the archive bit.   The files get backed up
each and every night. Only the full backup clears all the archive bits.

To get the NTFS change journal to work correctly we turned it on on all
drives the weekend of the full backups.  We needed to increase the default
settings of it too..we used the maximum settings.   With this our
incrementals have become managable.


Robert Maiello
Thomson Healtcare




On Mon, 24 Mar 2003 23:33:12 +0100, Bokkelkamp Ernst
<ernst.bokkelkamp AT SIEMENS DOT COM> wrote:

>I almost leaped into the air because of this message.
>
>This has been my main gripe against MS because in the past a change in ACL
>did not cause a change in the archive bit.
>
>But, once upon a time, I came to the conclusion that what might be the right
>thing to do could be the wrong thing at the wrong time.
>
>It is comforting that a change in ACL would cause a change to be recorded in
>the backup, but it is certainly a PITA if if causes a massive backup session
>because the data and the ACL are backed up at the same time.
>
>Bye
>Ernie
>
>
>-----Original Message-----
>From: francis.berges [mailto:francis.berges AT LAPOSTE DOT NET]
>Sent: Monday, March 24, 2003 5:18 PM
>To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>Subject: [Networker]Re: [Networker] How does NetWorker decide if a file
>has changed o r not?
>
>
>Through i am not a w2k specialist, we got the same probl
>Hello
>
>Through i am not a w2k specialist, we got the same problerm here on a file
>server ).
>this was due to the way of settings permissions
> if you give permissions to a group and you add a person to a group ==> no
>problem
> if you give permissions to a directory to a person, every file in this
>directory get the archive bit set.
>
>HTH
>
>Francis
>
>
>
>Well, I thought of the same thing at first.  But the machine I am talking
>about has
>a twin.  I mean there is an other machine with the exact same settings,
>hardware and
>software.  But this problem does not exist on the second one.
>
>Interesting ha?
>
>-----Original Message-----
>From: lemons_terry AT emc DOT com [mailto:lemons_terry AT emc DOT com]
>Sent: Monday, March 24, 2003 5:58 PM
>To: Emre PEKAR
>Cc: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>Subject: RE: [Networker] How does NetWorker decide if a file has changed o r
>not?
>
>
>Perhpas your virus scanning software is doing this; this has been reported
>several times in this mailing list in the past.
>
>tl
>
>-----Original Message-----
>From: Emre PEKAR [mailto:emre.pekar AT DATA-TEK.COM DOT TR]
>Sent: Monday, March 24, 2003 10:50 AM
>To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>Subject: Re: [Networker] How does NetWorker decide if a file has changed
>o r not?
>
>
>Guys,
>The reason why I am interested on the topic is that on my W2K servers,
>I get an incremental backup as large as the full backups on my large
>file systems.  I am trying to determine the reasons for this.
>
>When I conduct a test on the same server with a small saveset there appears
>to be nothing wrong. ?
>
>-----Original Message-----
>From: Robert Maiello [mailto:robert.maiello AT MEDEC DOT COM]
>Sent: Monday, March 24, 2003 5:45 PM
>To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>Subject: Re: [Networker] How does NetWorker decide if a file has changed or
>not?
>
>
>Others here may answer your question better but I'd thought I jump in and
>make you aware of the Networker and the Windows 2000 archive bit;  if the
>archive bit gets set in Windows 2000 that file will get backed up forever
>until a full backup is done.
>
>We've switched to using the NTFS change journal for our larger systems where
>where we don't want giant incrementals every night.
>
>
>Robert Maiello
>Thomson Healthcare
>
>On Mon, 24 Mar 2003 15:57:39 +0200, Emre PEKAR <emre.pekar AT DATA-TEK.COM DOT 
>TR>
>wrote:
>
>>Dear all,
>>Does anybody know how NetWorker decides on the changed files?
>>What is the working algorithm behind the incremental backups?
>>I know that you can make NetWorker use modify date by a directive,
>>or make it use the NTFS change log.
>>But in the normal case what does it use?  If it is only the size, than it
>>would
>>be too simple :)
>>
>>Best regards,
>>
>>Richard E. PEKAR
>>
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Re: [Networker] How does NetWorker decide if a fil e has changed o r not?
