Networker

Re: [Networker] Incrementals and Indexes ?

2008-04-02 18:34:00
Subject: Re: [Networker] Incrementals and Indexes ?
From: Michael Nored <mrnored AT NETZERO DOT NET>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Wed, 2 Apr 2008 18:32:39 -0400
I did test this on a system that is using change journal and it does display
as I would expect it to.

Michael Nored
Consultant
Nored Consulting, LLC
 
M: (407) 399-8162
T:  (352) 350-7142
E: mnored AT Netzero DOT net


-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Mathew Harvest
Sent: Wednesday, April 02, 2008 6:18 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Incrementals and Indexes ?

Its not you ... its Networker ... engineering apparently have a ticket -
LGTpa35113 (I think) for this problem... 

In the mean time you just need to ask your users to not rename any
directories or move any files, or you could do daily full backups...

Mat.


-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Roy Wiseman
Sent: Thursday, 3 April 2008 8:01 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Incrementals and Indexes ?

Thanks Michael,

I've refreshed the GUI and no change unfortunately. I've been seeing
this
behaviour for a few weeks and it's only now that I thought I'd ask
someone about it. Version is NetWorker Management Console version
3.4.1.Build.335 based on NetWorker version 7.4 SP1.Build.335.

I do a full backup. Then I rearrange the folder structure. Then I change
say
2 files. The 2 changed files will be caught in the incremental but
nothing
else, and when I open up NetWorker User and point the Browse Time at the
day
of the incremental, I only see the 2 changed files and nothing else (no
directory structure or files). Am I doing something really naive here ?
These are fairly pristine installations, no options changed and the
group
and pool are just by the defaults. If I flip the Browse Time back a day
I
see everything, but for today, for the incremental, I see only the two
changed files. Any ideas what I'm doing wrong here ?

Thanks,

Roy.

On Wed, Apr 2, 2008 at 11:03 PM, Michael Nored <mrnored AT netzero DOT net>
wrote:

> Roy,
> Works for me I see the file in the recovery GUI under the new folder
name.
> Did you refresh your GUI in between backups?
>
> Michael Nored
> Consultant
> Nored Consulting, LLC
>
> M: (407) 399-8162
> T:  (352) 350-7142
> E: mnored AT Netzero DOT net
>
>
> -----Original Message-----
> From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On
> Behalf Of Roy Subs
> Sent: Wednesday, April 02, 2008 4:03 PM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: [Networker] Incrementals and Indexes ?
>
> Hi,
>
> I've got a question about how NetWorker processes incrementals.
> I backed up a new folder, D:\Stuff, so an inital full save set was
made of
> 20,000 files taking up 5 GB.
> I then created a new subfolder, D:\Stuff\Temp, and I moved ALL files
from
> D:\Stuff into D:\Stuff\Temp. So, I now have D:\Stuff\Temp which
contains
> all the files, and D:\Stuff which has no files, but just the subfolder
> Temp
> in it. I then started an incremental backup.
> Final result: *nothing* was backed up.
>
> So what is the process for the incr ? Is it :
> 1. NetWorker indexes all the files in the location to be incrementally
> backed up ?
> 2. then, it creates CRC's and cross-references that to the index of
the
> original full ?
> 3. then, only files that do not have a match in the existing full
index
> from step 2 ?
>
> BUT, and this is sorta important, if I go to NetWorker User, and look
at
> available files from that incr backup, NOTHING is there. This makes
sense
> of course, as there were no file changes incrementally backed up, but
what
> if you massively altered the directory structure and you lost that ??
You
> would not be able to reconstruct the changed structure !
>
> e.g. a user called Joe Tucci spends 8 hours on Wednesday reorganising
his
> work folder. he does not EDIT a single file, but that 8 hours of
> organisation work IS work (ok, maybe Joe should've had a better
> organisation system for his files before now, but still ...). Then, on
> Thursday morning an incremental backup happens at 3:33 am. On Thursday
> morning, a NAS box explodes wiping out the entire data center (as that
was
> the particular revision of Celerra that they made out of
nitro-glycerine.
> an easy design mistake to make. oops). But, Joe thinks "that's ok !,
the
> backups were made, so all my folder reorganisation is safe !" ... but
> actually, Joe's out of luck, as NOTHING was saved of his
reorganisation as
> NetWorker decided that no files had changed so it simply backed up
NOTHING
> (so all the 8 hours of folder reorganisation that Joe did is lost).
Joe
> can
> get all his files back from the Wednesady morning backup, but he's
going
> to
> have to do all that 8 hours of reorganisation again by hand.
>
> Is that right ?? I'm just quite curious, as it might be useful to
backup
> changed folder structures (i.e. fair enough don't backup the files as
> nothings changed, but DO at least backup an index of the changed
folder
> structure every night). Is there some option to do this ? And also,
what
> is
> the exact process by which NetWorker determines what will and will not
be
> backed up ?
>
> Thanks,
>
> Roy.
>
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>
>
>

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