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I didn't see an answer to your question on the NetBackup functionality for
going to disk with DSSUs and then getting multiple copies to disk.
As you stated, it wouldn't make sense to use ITC to go to the DSSU and tape
at the same time.
You can however, use ITC during the migration from disk to tape so it's from
disk to multiple tapes. This does not require the Vault installation or
license.
The only drawback is using different retentions. Unlike normal ITC jobs
where you can mix retention levels for the copies, for some reason in the
GUI the multiple copies window under DSSUs doesn't show retention levels as
something that can be altered... seems really stupid. Hopefully a fix to
this is on it's way. I haven't looked at doing this through the CLI, so I
don't know if it's this way on purpose or just a bug in the GUI.
- Scott
_____
From: Paul Esson [mailto:paul.esson AT redstor DOT com]
Sent: Wednesday, June 09, 2004 11:24 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Disk Based Backup
Folks,
I am currently deliberating over disk based backup options and would welcome
comments from those with first hand experience.
Specifically, I am trying to way up the pros and cons of using a Virtual
Tape Library versus sharing storage out to media servers from say a SATA
disk array. The latter looks attractive particularly since the introduction
in v5.0 of Disk Staging Storage Units (DSSUs). Is anyone using DSSUs
currently? With VTL there seems to be the cost issue of licensing drives as
in a regular library.
What I would like to do is write all backups initially to disk but then
stage the full backups to tape. I had hoped to create two tape copies one
to remain onsite (in a tape library) and the other to go offsite. However,
I am somewhat confused as to the NetBackup functionality required to achieve
this? If I use the DSSU the data appears to be migrated to tape as part of
the policy anyway, but how would I achieve my twin copies on tape, ideally
with different retention levels? Do I actually require to use inline copy
or even Vault (duplication) to achieve my end? The concern I have with
inline copy is that the quicker write to disk will be negated by having to
write to tape at the same time and before the job completes. As for Vault I
don't know the product at all but believe it is licensed by drive (How does
this work if your source is a disk storage unit?) and that could prove
costly. I have also read on this list adverse comments about duplication
speeds, although I would be writing from disk to tape.
All comments on any of these items very welcome.
Regards,
Paul Esson
Senior Support Engineer
Redstor Limited
Direct: +44 (0) 1224 595381
Mobile: +44 (0) 7766 906514
E-Mail: paul.esson AT redstor DOT com
Web: www.redstor.com
REDSTOR LIMITED
Torridon House
73-75 Regent Quay
Aberdeen
UK
AB11 5AR
Disclaimer:
The information included in this e-mail is of a confidential nature and is
intended only for the addressee. If you are not the intended addressee, any
disclosure, copying or distribution by you is prohibited and may be
unlawful. Disclosure to any party other than the addressee, whether
inadvertent or otherwise is not intended to waive privilege or
confidentiality.
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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'>I didn’t see an answer to =
your
question on the NetBackup functionality for going to disk with DSSUs =
and then
getting multiple copies to disk.<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> </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'>As you stated, it wouldn’t =
make
sense to use ITC to go to the DSSU and tape at the same =
time.<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> </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'>You can however, use ITC during =
the
migration from disk to tape so it’s from disk to multiple =
tapes.
This does not require the Vault installation or =
license.<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> </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'>The only drawback is using =
different
retentions. Unlike normal ITC jobs where you can mix retention =
levels for
the copies, for some reason in the GUI the multiple copies window under =
DSSUs doesn’t
show retention levels as something that can be altered… seems =
really
stupid. Hopefully a fix to this is on it’s way. I =
haven’t
looked at doing this through the CLI, so I don’t know if =
it’s this
way on purpose or just a bug in the GUI.<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> </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> </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'>- Scott =
<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> </o:p></span></font></p>=
<div>
<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
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</span></font></div>
<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'> Paul =
Esson
[mailto:paul.esson AT redstor DOT com] <br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Wednesday, June =
09, 2004
11:24 AM<br>
<b><span style=3D'font-weight:bold'>To:</span></b>
veritas-bu AT mailman.eng.auburn DOT edu<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [Veritas-bu] =
Disk Based
Backup</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> </o:p></span></font></p>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DVerdana><span =
style=3D'font-size:10.0pt;
font-family:Verdana'>Folks,</span></font><o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DVerdana><span =
style=3D'font-size:10.0pt;
font-family:Verdana'>I am currently deliberating over disk based backup =
options
and would welcome comments from those with first hand experience. =
</span></font><o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DVerdana><span =
style=3D'font-size:10.0pt;
font-family:Verdana'>Specifically, I am trying to way up the pros and =
cons of
using a Virtual Tape Library versus sharing storage out to media =
servers from
say a SATA disk array. The latter looks attractive particularly =
since the
introduction in v5.0 of Disk Staging Storage Units (DSSUs). Is =
anyone
using DSSUs currently? With VTL there seems to be the cost issue =
of
licensing drives as in a regular library.</span></font><o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DVerdana><span =
style=3D'font-size:10.0pt;
font-family:Verdana'>What I would like to do is write all backups =
initially to
disk but then stage the full backups to tape. I had hoped to =
create two
tape copies one to remain onsite (in a tape library) and the =
other to
go offsite. However, I am somewhat confused as to the NetBackup
functionality required to achieve this? If I use the DSSU the =
data
appears to be migrated to tape as part of the policy anyway, but how =
would I
achieve my twin copies on tape, ideally with different retention
levels? Do I actually require to use inline copy or even Vault
(duplication) to achieve my end? The concern I have with inline =
copy is
that the quicker write to disk will be negated by having to write to =
tape at
the same time and before the job completes. As for Vault I don't =
know the
product at all but believe it is licensed by drive (How does this =
work if
your source is a disk storage unit?) and that could prove costly. =
I have
also read on this list adverse comments about duplication speeds, =
although I
would be writing from disk to tape.</span></font><o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DVerdana><span =
style=3D'font-size:10.0pt;
font-family:Verdana'>All comments on any of these items very =
welcome.</span></font><o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DVerdana><span =
style=3D'font-size:10.0pt;
font-family:Verdana'>Regards,</span></font><o:p></o:p></p>
</div>
<div>
<p class=3Dsection1 style=3D'margin-bottom:12.0pt'><font size=3D2 =
face=3DVerdana><span
style=3D'font-size:10.0pt;font-family:Verdana'>Paul Esson<br>
Senior Support Engineer<br>
Redstor Limited<br>
<br>
Direct: +44 (0) 1224 =
595381<br>
<st1:City w:st=3D"on"><st1:place =
w:st=3D"on">Mobile</st1:place></st1:City>:
+44 (0) 7766 906514<br>
E-Mail: =
paul.esson AT redstor DOT com<br>
Web:
www.redstor.com<br>
<br>
REDSTOR LIMITED<br>
Torridon House<br>
73-75 Regent Quay<br>
<st1:City w:st=3D"on"><st1:place =
w:st=3D"on">Aberdeen</st1:place></st1:City><br>
<st1:country-region w:st=3D"on"><st1:place =
w:st=3D"on">UK</st1:place></st1:country-region><br>
AB11 5AR<br>
<br>
Disclaimer:<br>
The information included in this e-mail is of a confidential nature and =
is
intended only for the addressee. If you are not the intended =
addressee,
any disclosure, copying or distribution by you is prohibited and may be
unlawful. Disclosure to any party other than the addressee, =
whether
inadvertent or otherwise is not intended to waive privilege or =
confidentiality.<o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
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