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I'm curious: Why do people use different volume pools? We have one pool
for Exchange backups, and three others to go with our Iron Mountain weekly
rotations, but I'm not sure what that's buying us. For tracking Iron
Mountain boxes, we use volume groups, so the three pools for that are
redundant. It's nice to be able to easily break out the Exchange tapes, bu=
t
there are other ways of getting that information. So I don't think the cas=
e
for separate volume pools is all that compelling for us. How do other folk=
s
use them?
other than being able to track easily how much
On 3/23/06, andrew.x.smith AT jpmchase DOT com <andrew.x.smith AT jpmchase DOT
com> wrote=
:
>
>
> Hi Paul,
>
> 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,
>
> cheers Andy.
>
>
>
>
>
> *"Paul Keating" <pkeating AT bank-banque-canada DOT ca>*
> Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu
>
> 23/03/2006 13:05
>
> To: <veritas-bu AT mailman.eng.auburn DOT edu>
> cc:
> Subject: [Veritas-bu] on the subject of disk based
> backups....
>
>
>
> I'm also interested in thoughts regarding VTL vs DSSU.
>
> DSSU interests me mostly because I can write multiple jobs at once withou=
t
> any regard for tape pool, mpx or not, retention, etc.....
>
> ...then it all gets sorted out to appropriate tapes during the destaging
>
> 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 regardi=
ng
> estimated compression, etc.)
>
> Just a couple things off the top of my head.
>
> 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 tha=
t
> made one option better than the other.
>
> Paul
>
>
--
Phil Rand
philrand AT pobox DOT com
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I'm curious: Why do people use different volume pools? We have =
one pool for Exchange backups, and three others to go with our Iron Mountai=
n weekly rotations, but I'm not sure what that's buying us. For track=
ing Iron Mountain boxes, we use volume groups, so the three pools for that =
are redundant. It's nice to be able to easily break out the Exchange =
tapes, but there are other ways of getting that information. So I don=
't think the case for separate volume pools is all that compelling for us.&=
nbsp; How do other folks use them?
<br><br>other than being able to track easily how much <br><br><div><span c=
lass=3D"gmail_quote">On 3/23/06, <b class=3D"gmail_sendername"><a href=3D"m=
ailto:andrew.x.smith AT jpmchase DOT com">andrew.x.smith AT jpmchase DOT
com</a></b> <=
<a href=3D"mailto:andrew.x.smith AT jpmchase DOT com">
andrew.x.smith AT jpmchase DOT com</a>> wrote:</span><blockquote
class=3D"gmail=
_quote" style=3D"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt=
0pt 0.8ex; padding-left: 1ex;"><div style=3D"direction: ltr;">
<br><font face=3D"sans-serif" size=3D"2">Hi Paul,</font>
<br>
<br><font face=3D"sans-serif" size=3D"2"> from my experience what you=
say about DSSU is incorrect, a single DSSU cannot stage the data off to mu=
ltiple tape tape pools - if you have a requirement to stage to different ta=
pe pools you need to have a at least one DSSU per tape pool,
</font>
<br>
<br><font face=3D"sans-serif" size=3D"2"> =
cheers Andy.</font>
<br>
<br>
<br>
<br>
<br>
<table width=3D"100%">
<tbody><tr valign=3D"top">
<td>
<br></td><td><font face=3D"sans-serif" size=3D"1"><b>"Paul Keating&quo=
t; <<a href=3D"mailto:pkeating AT bank-banque-canada DOT ca"
target=3D"_blank" =
onclick=3D"return top.js.OpenExtLink(window,event,this)">pkeating@bank-banq=
ue-canada.ca
</a>></b></font>
<br><font face=3D"sans-serif" size=3D"1">Sent by: <a href=3D"mailto:veritas=
-bu-admin AT mailman.eng.auburn DOT edu" target=3D"_blank" onclick=3D"return
top.j=
s.OpenExtLink(window,event,this)">veritas-bu-admin AT mailman.eng.auburn DOT
edu</=
a></font>
<p><font face=3D"sans-serif" size=3D"1">23/03/2006 13:05</font>
<br>
</p></td><td><font face=3D"Arial" size=3D"1"> </=
font>
<br><font face=3D"sans-serif" size=3D"1"> To: &n=
bsp; <<a href=3D"mailto:veritas-bu AT mailman DOT
eng.aubur=
n.edu" target=3D"_blank" onclick=3D"return top.js.OpenExtLink(window,event,=
this)">veritas-bu AT mailman.eng.auburn DOT edu</a>>
</font>
<br><font face=3D"sans-serif" size=3D"1"> cc: &n=
bsp; </font>
<br><font face=3D"sans-serif" size=3D"1"> Subjec=
t: [Veritas-bu] on the subject of disk based bac=
kups....</font></td></tr></tbody></table></div><div style=3D"direction: ltr=
;"><span class=3D"e" id=3D"q_10a27552f2084fd4_1">
<br>
<br>
<br><font face=3D"Times New Roman" size=3D"2">I'm also interested in though=
ts regarding VTL vs DSSU.</font>
<p><font face=3D"Arial" size=3D"2">DSSU interests me mostly because I can w=
rite multiple jobs at once without any regard for tape pool, mpx or not, re=
tention, etc.....</font>
</p><p><font face=3D"Arial" size=3D"2">...then it all gets sorted out to ap=
propriate tapes during the destaging</font>
</p><p><font face=3D"Arial" size=3D"2">VTL still presents itself to NBU as =
a tape, so each virtual tape drive must be licensed with Veritas, in additi=
onal to the physical tape drives (unless the VTL is run inline, though ther=
e could be issues there regarding estimated compression, etc.)=20
</font>
</p><p><font face=3D"Arial" size=3D"2">Just a couple things off the top of =
my head.</font>
</p><p><font face=3D"Arial" size=3D"2">Just wondering who is using DSSU, ad=
n who is using VTL, adn why you made that choice....ie.what were the key re=
quirements for your environment that made one option better than the other.
</font>
</p><p><font face=3D"Arial" size=3D"2">Paul</font>
</p><p>
</p><p>
</p><p></p><p></p><p></p><p></p><p></p><p></p><p></p></span></div></blockqu=
ote></div><br><br clear=3D"all"><br>-- <br>Phil Rand<br><a href=3D"mailto:p=
hilrand AT pobox DOT com">philrand AT pobox DOT com</a><br>
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