[Veritas-bu] Best way to backup 3TB of data daily?

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Also, if this is true:

=20

Is it better to use multiplexed backups if each source(client) is only
5-10MB/s and the combined sources will give it a smooth 50-60MB/s?

=20

Justin.

=20

________________________________

From: Dean [mailto:dean.deano AT gmail DOT com]=20
Sent: Wednesday, May 11, 2005 6:31 PM
To: Piszcz, Justin
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Best way to backup 3TB of data daily?

=20

You should be able to get much more than 20 MB/s on an LTO2 drive. I
have seen 60 - 80 MB/sec on a single drive. Drip feeding 5 LTO2's with
100MB/sec will lead to shoe-shining on the drives, damaging both drives
and media.

As others suggested, turn the server with all the data into a SAN Media
Server and connect it to your tape SAN, or do some mirroring and
off-host backup.

On 5/12/05, Piszcz, Justin <jpiszcz AT servervault DOT com> wrote:

All,

=20

I was curious if anyone here is backing up large amounts of data, such
as large databases and fileservers that are 3TB or bigger.

What is the best way to accomplish such backups?

=20

Here is one 'idea' - please let me know if there are other, better ways:

=20

If one can sustain 100 megabytes per second over a gigabit link writing
to multiple (5) LTO2 tape drives, each doing 20MB/s then it would still
take around 8 hours to backup this information, essentially you would
need a complete backup solution JUST for this 3TB array.

=20

What are some good methods when backing up such large data sets?

=20

Thanks!

=20

=20


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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Also, if this is =
true:<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Is it better to use multiplexed =
backups if
each source(client) is only 5-10MB/s and the combined sources will give =
it a
smooth 50-60MB/s?<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Justin.<o:p></o:p></span></font></p>=


<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

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<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> Dean
[mailto:dean.deano AT gmail DOT com] <br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Wednesday, May 11, =
2005 6:31
PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> Piszcz, Justin<br>
<b><span style=3D'font-weight:bold'>Cc:</span></b>
veritas-bu AT mailman.eng.auburn DOT edu<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: [Veritas-bu] =
Best way
to backup 3TB of data daily?</span></font><o:p></o:p></p>

</div>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><font size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>You should be =
able to get
much more than 20 MB/s on an LTO2 drive. I have seen 60 - 80 MB/sec on a =
single
drive. Drip feeding 5 LTO2's with 100MB/sec will lead to shoe-shining on =
the
drives, damaging both drives and media.<br>
<br>
As others suggested, turn the server with all the data into a SAN Media =
Server
and connect it to your tape SAN, or do some mirroring and off-host =
backup.<o:p></o:p></span></font></p>

<div>

<p class=3DMsoNormal><span class=3Dgmailquote><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>On 5/12/05, <b><span =
style=3D'font-weight:bold'>Piszcz,
Justin</span></b> &lt;<a =
href=3D"mailto:jpiszcz AT servervault DOT com">jpiszcz AT servervault DOT 
com</a>&gt;
wrote:</span></font></span><o:p></o:p></p>

<div>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>All,</span></font><o:p></o:p=
></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>&nbsp;</span></font><o:p></o=
:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>I
was curious if anyone here is backing up large amounts of data, such as =
large
databases and fileservers that are 3TB or =
bigger.</span></font><o:p></o:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>What
is the best way to accomplish such backups?</span></font><o:p></o:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>&nbsp;</span></font><o:p></o=
:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Here
is one 'idea' &#8211; please let me know if there are other, better =
ways:</span></font><o:p></o:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>&nbsp;</span></font><o:p></o=
:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>If
one can sustain 100 megabytes per second over a gigabit link writing to
multiple (5) LTO2 tape drives, each doing 20MB/s then it would still =
take
around 8 hours to backup this information, essentially you would need a
complete backup solution JUST for this 3TB =
array.</span></font><o:p></o:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>&nbsp;</span></font><o:p></o=
:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>What
are some good methods when backing up such large data =
sets?</span></font><o:p></o:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>&nbsp;</span></font><o:p></o=
:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Thanks!</span></font><o:p></=
o:p></p>

<p><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>&nbsp;</span></font><o:p></o=
:p></p>

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style=3D'font-size:
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