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... and I'm not sure of your background, unix or windows, but it is not=20
uncommon to have a combination of differential and cumulative backups on=20
the same client in a unix environment to spread the distance between fulls =
out even longer.
You will NOT get the same results when you do this in a Windows=20
environment, when you're using the archive bit. Mixing the two,=20
cumulatives and differentials, against the same data in a Windows=20
environment does not buy you anything, and can sometimes be worse.
- Scott
"Patrick Whelan" <consultant0610 AT hotmail DOT com>
Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu
01/22/2003 04:48 AM
=20
To: Laurence.Moughan AT o2 DOT com, veritas-bu AT
mailman.eng.auburn DOT edu
cc:=20
Subject: Re: [Veritas-bu] backup types pro and cons
It depends on what your backing up, how much changes from backup to backup =
and are you cncerned from a DR point of view, or just daily restores. In=20
general cumulative takes more tape and more time to backup, but less time=20
to=20
restore, i.e. Full + 1 cum. -- Diff. takes less tape and time, unless a=20
lot=20
of files change, but it takes Full + all diff. tapes since the last full.
In general there is no set answer. It depends on the environment in which=20
the question is asked.
Patrick Whelan
Crackx.com
Ges f=FCr informationstechnologie mbH
Frankfurt Germany
Mobile +49 (0)1733272233
>From: "Moughan, Laurence" <Laurence.Moughan AT o2 DOT com>
>To: "'veritas-bu AT mailman.eng.auburn DOT edu'"=20
><veritas-bu AT mailman.eng.auburn DOT edu>
>Subject: [Veritas-bu] backup types pro and cons
>Date: Wed, 22 Jan 2003 10:19:20 -0000
>
>Hi All,
>
>Differential versus cumulative - ??
>
>any pros and cons to said ?
>
>
>Thanks
>
>Laurence
>
>
>**************************************************************************=
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<br><font size=3D2 face=3D"Arial">... and I'm not sure of your background, =
unix or windows, but it is not uncommon to have a combination of differenti=
al and cumulative backups on the same client in a unix environment to sprea=
d the distance between fulls out even longer.</font>
<br>
<br><font size=3D2 face=3D"Arial">You will NOT get the same results when yo=
u do this in a Windows environment, when you're using the archive bit. &nbs=
p;Mixing the two, cumulatives and differentials, against the same data in a=
Windows environment does not buy you anything, and can sometimes be worse.=
</font>
<br>
<br>
<br><font size=3D2 face=3D"Arial">- Scott</font>
<br>
<br>
<br>
<br>
<table width=3D100%>
<tr valign=3Dtop>
<td>
<td><font size=3D1 face=3D"sans-serif"><b>"Patrick Whelan" <co=
nsultant0610 AT hotmail DOT com></b></font>
<br><font size=3D1 face=3D"sans-serif">Sent by: veritas-bu-admin AT mailman DOT
en=
g.auburn.edu</font>
<p><font size=3D1 face=3D"sans-serif">01/22/2003 04:48 AM</font>
<br>
<td><font size=3D1 face=3D"Arial"> </font>
<br><font size=3D1 face=3D"sans-serif"> To: &nbs=
p; Laurence.Moughan AT o2 DOT com, veritas-bu AT
mailman.eng DOT aubu=
rn.edu</font>
<br><font size=3D1 face=3D"sans-serif"> cc: &nbs=
p; </font>
<br><font size=3D1 face=3D"sans-serif"> Subject:=
Re: [Veritas-bu] backup types pro and cons</fon=
t></table>
<br>
<br>
<br><font size=3D2 face=3D"Courier New">It depends on what your backing up,=
how much changes from backup to backup <br>
and are you cncerned from a DR point of view, or just daily restores. In <b=
r>
general cumulative takes more tape and more time to backup, but less time t=
o <br>
restore, i.e. Full + 1 cum. -- Diff. takes less tape and time, unless a lot=
<br>
of files change, but it takes Full + all diff. tapes since the last full.<b=
r>
In general there is no set answer. It depends on the environment in which <=
br>
the question is asked.<br>
<br>
<br>
<br>
Patrick Whelan<br>
Crackx.com<br>
Ges f=FCr informationstechnologie mbH<br>
Frankfurt Germany<br>
Mobile +49 (0)1733272233<br>
<br>
<br>
<br>
<br>
<br>
>From: "Moughan, Laurence" <Laurence.Moughan AT o2 DOT
com><br>
>To: "'veritas-bu AT mailman.eng.auburn DOT edu'" <br>
><veritas-bu AT mailman.eng.auburn DOT edu><br>
>Subject: [Veritas-bu] backup types pro and cons<br>
>Date: Wed, 22 Jan 2003 10:19:20 -0000<br>
><br>
>Hi All,<br>
><br>
>Differential versus cumulative - ??<br>
><br>
>any pros and cons to said ?<br>
><br>
><br>
>Thanks<br>
><br>
>Laurence<br>
><br>
><br>
>***********************************************************************=
*****************<br>
><br>
>This E-mail is from O2. The E-mail and any files<br>
>transmitted with it are confidential and may also be privileged and <br>
>intended<br>
>solely for the use of the individual or entity to whom they are address=
ed.<br>
>Any unauthorised direct or indirect dissemination, distribution or copy=
ing<br>
>of this message and any attachments is strictly prohibited. If you have=
<br>
>received the E-mail in error please notify postmaster AT O2 DOT com or<br>
> telepho=
ne ++ 353 1 6095000.<br>
><br>
>***********************************************************************=
******************<br>
><br>
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>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu<br>
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