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[Veritas-bu] [Incremental: (Differential + Cumulative)] + Full Backup Policy Question
2005-11-09 14:34:49
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Subject: |
[Veritas-bu] [Incremental: (Differential + Cumulative)] + Full Backup Policy Question |
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From: |
jpiszcz AT servervault DOT com (Piszcz, Justin) |
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Date: |
Wed, 9 Nov 2005 14:34:49 -0500 |
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I have a client that will be backing up a data set which:
=20
1) The client needs a full backup every 90 days with incrementals
backups in between on a 1 year retention policy.
=20
I explained to the client that doing differential-incrementals would be
a nightmare to do a full restore.
I then continued to explain that cumulative-incrementals would use a lot
of tapes.
=20
I suggested the following:
=20
Day 0: Perform full backup.
Day 1: Perform differential-incremental.
Day 2: Perform differential-incremental.
Day 3: Perform differential-incremental.
Day 4: Perform differential-incremental.
Day 5: Perform differential-incremental.
Day 6: Perform differential-incremental.
Day 7: Perform cumulative-incremental. ***
Day 8: Perform differential-incremental.
Day 9: Perform differential-incremental.
Day 10: Perform differential-incremental.
Day 11: Perform differential-incremental.
Day 12: Perform differential-incremental.
Day 13: Perform differential-incremental.
Day 14: Perform cumulative-incremental. ***
Day 15: Perform differential-incremental.
Day 16: Perform differential-incremental.
Day 17: Perform differential-incremental.
Day 18: Perform differential-incremental.
Day 19: Perform differential-incremental.
Day 20: Perform differential-incremental.
Day 21: Perform cumulative-incremental. ***
Day 22: Perform differential-incremental.
Day 23: Perform differential-incremental.
Day 24: Perform differential-incremental.
Day 25: Perform differential-incremental.
Day 26: Perform differential-incremental.
Day 27: Perform differential-incremental.
Day 28: Perform cumulative-incremental. **
Day 29: Perform differential-incremental.
Day 30: Perform differential-incremental.
Day 31: Perform differential-incremental.
=20
Suppose at the end of the month the client wanted a FULL restoration of
all files, by using this method tell me if this is correct:
=20
1) Restore Day 0's full backup.
2) Restore the cumulative backup from Day7, Day14, Day21,Day28.
3) Restore the differential-incremental backups from Day29,30,31.
=20
Then I would have fully restored all of the files, correct?
=20
Please let me know if this makes sense.
=20
Thanks!
=20
Justin.
=20
=20
=20
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I have a client that will be backing up a data set =
which:<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 =
lfo1'><![if !supportLists]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><span
style=3D'mso-list:Ignore'>1)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'> =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>The client needs
a full backup every 90 days with incrementals backups in between on a 1 =
year
retention policy.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I explained to the client that doing
differential-incrementals would be a nightmare to do a full =
restore.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I then continued to explain that =
cumulative-incrementals
would use a lot of tapes.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I suggested the =
following:<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><b><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;font-weight:bold'>Day 0: Perform full =
backup.<o:p></o:p></span></font></b></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 1: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 2: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 3: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 4: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 5: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 6: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><b><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;font-weight:bold'>Day 7: Perform =
cumulative-incremental. ***<o:p></o:p></span></font></b></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 8: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 9: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 10: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 11: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 12: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 13: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><b><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;font-weight:bold'>Day 14: Perform =
cumulative-incremental. ***<o:p></o:p></span></font></b></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 15: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 16: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 17: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 18: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 19: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 20: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><b><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;font-weight:bold'>Day 21: Perform =
cumulative-incremental. ***<o:p></o:p></span></font></b></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 22: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 23: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 24: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 25: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 26: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 27: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><b><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial;font-weight:bold'>Day 28: Perform =
cumulative-incremental. **<o:p></o:p></span></font></b></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 29: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 30: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Day 31: Perform =
differential-incremental.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Suppose at the end of the month the client wanted a =
FULL
restoration of all files, by using this method tell me if this is =
correct:<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 =
lfo2'><![if !supportLists]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><span
style=3D'mso-list:Ignore'>1)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'> =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Restore Day 0’s
full backup.<o:p></o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 =
lfo2'><![if !supportLists]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><span
style=3D'mso-list:Ignore'>2)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'> =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Restore the
cumulative backup from Day7, Day14, =
Day21,Day28.<o:p></o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 =
lfo2'><![if !supportLists]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><span
style=3D'mso-list:Ignore'>3)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'> =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Restore the =
differential-incremental
backups from Day29,30,31.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Then I would have fully restored all of the files, =
correct?<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Please let me know if this makes =
sense.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Thanks!<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Justin.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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