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excellent info...Now that you mention it....my one small DSSU I have
configured to offload to a specific tape pool, so I should have known
that.
That definately sways me in the direction of VTL then.
-----Original Message-----
From: andrew.x.smith AT jpmchase DOT com
[mailto:andrew.x.smith AT jpmchase DOT com]=20
Sent: March 23, 2006 8:30 AM
To: Paul Keating
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] on the subject of disk based
backups....
=09
=09
Hi Paul,=20
=09
from my experience what you say about DSSU is incorrect, a
single DSSU cannot stage the data off to multiple tape tape pools - if
you have a requirement to stage to different tape pools you need to have
a at least one DSSU per tape pool,=20
=09
cheers Andy.=20
=09
=09
=09
=09
=09
"Paul Keating" <pkeating AT bank-banque-canada DOT ca>=20
Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu=20
23/03/2006 13:05=20
=20
To: <veritas-bu AT mailman.eng.auburn DOT edu>=20
cc: =20
Subject: [Veritas-bu] on the subject of disk based
backups....
I'm also interested in thoughts regarding VTL vs DSSU.=20
DSSU interests me mostly because I can write multiple jobs at
once without any regard for tape pool, mpx or not, retention, etc.....=20
...then it all gets sorted out to appropriate tapes during the
destaging=20
VTL still presents itself to NBU as a tape, so each virtual tape
drive must be licensed with Veritas, in additional to the physical tape
drives (unless the VTL is run inline, though there could be issues there
regarding estimated compression, etc.)=20
Just a couple things off the top of my head.=20
Just wondering who is using DSSU, adn who is using VTL, adn why
you made that choice....ie.what were the key requirements for your
environment that made one option better than the other.=20
Paul=20
=09
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<DIV><SPAN class=3D777014815-23032006><FONT face=3DArial color=3D#800000 =
size=3D2>excellent info...Now that you mention it....my one small DSSU I =
have=20
configured to offload to a specific tape pool, so I should have known=20
that.</FONT></SPAN></DIV>
<DIV><SPAN class=3D777014815-23032006><FONT face=3DArial color=3D#800000 =
size=3D2>That=20
definately sways me in the direction of VTL then.</FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #800000 2px =
solid; MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr =
align=3Dleft><FONT=20
face=3DTahoma size=3D2>-----Original Message-----<BR><B>From:</B>=20
andrew.x.smith AT jpmchase DOT com [mailto:andrew.x.smith AT jpmchase DOT
com]=20
<BR><B>Sent:</B> March 23, 2006 8:30 AM<BR><B>To:</B> Paul=20
Keating<BR><B>Cc:</B> =
veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B> Re:=20
[Veritas-bu] on the subject of disk based=20
backups....<BR><BR></FONT></DIV><BR><FONT face=3Dsans-serif =
size=3D2>Hi=20
Paul,</FONT> <BR><BR><FONT face=3Dsans-serif size=3D2> from my =
experience=20
what you say about DSSU is incorrect, a single DSSU cannot stage the =
data off=20
to multiple tape tape pools - if you have a requirement to stage to =
different=20
tape pools you need to have a at least one DSSU per tape pool,</FONT>=20
<BR><BR><FONT face=3Dsans-serif size=3D2> =
=20
cheers Andy.</FONT> <BR><BR><BR><BR><BR>
<TABLE width=3D"100%">
<TBODY>
<TR vAlign=3Dtop>
<TD>
<TD><FONT face=3Dsans-serif size=3D1><B>"Paul Keating"=20
<pkeating AT bank-banque-canada DOT ca></B></FONT> <BR><FONT=20
face=3Dsans-serif size=3D1>Sent by:=20
veritas-bu-admin AT mailman.eng.auburn DOT edu</FONT>=20
<P><FONT face=3Dsans-serif size=3D1>23/03/2006 13:05</FONT> =
<BR></P>
<TD><FONT face=3DArial size=3D1> =
</FONT><BR><FONT=20
face=3Dsans-serif size=3D1> To: =
=20
<veritas-bu AT mailman.eng.auburn DOT edu></FONT> =
<BR><FONT=20
face=3Dsans-serif size=3D1> cc: =
=20
</FONT> <BR><FONT face=3Dsans-serif size=3D1> =
=20
Subject: [Veritas-bu] =
on the=20
subject of disk based =
backups....</FONT></TR></TBODY></TABLE><BR><BR><BR><FONT=20
face=3D"Times New Roman" size=3D2>I'm also interested in thoughts =
regarding VTL vs=20
DSSU.</FONT>=20
<P><FONT face=3DArial size=3D2>DSSU interests me mostly because I can =
write=20
multiple jobs at once without any regard for tape pool, mpx or not, =
retention,=20
etc.....</FONT>=20
<P><FONT face=3DArial size=3D2>...then it all gets sorted out to =
appropriate tapes=20
during the destaging</FONT>=20
<P><FONT face=3DArial size=3D2>VTL still presents itself to NBU as a =
tape, so each=20
virtual tape drive must be licensed with Veritas, in additional to the =
physical tape drives (unless the VTL is run inline, though there could =
be=20
issues there regarding estimated compression, etc.) </FONT>
<P><FONT face=3DArial size=3D2>Just a couple things off the top of my =
head.</FONT>=20
<P><FONT face=3DArial size=3D2>Just wondering who is using DSSU, adn =
who is using=20
VTL, adn why you made that choice....ie.what were the key requirements =
for=20
your environment that made one option better than the other.</FONT>=20
<P><FONT face=3DArial size=3D2>Paul</FONT>=20
<P>
<P></P></BLOCKQUOTE></BODY></HTML>
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