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[Veritas-bu] Fragment Size
2002-05-15 18:51:16
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RE: [Veritas-bu] Fragment SizeCheck again on your negative ... normal
end-of-tape processing is performed regardless of whether you record one big
fragment or many small ones.
Regards,
-Brian
-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Brochart,
Fabrice
Sent: Wednesday, May 15, 2002 11:15 AM
To: 'Michael Suen'; Carlos Perales
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Fragment Size
Hi all,
I've never tested that ,but customer said me that you can create fragment
for tape to "accelerate" restore !
Take a look at the SAG page 643.
But the negative point is, if you arrive at the end of tape and you can't
finish write your fragment(EOT detected !!), then you have to rewrite the
whole fragment.
Hth
F@b
-----Original Message-----
From: Michael Suen [mailto:suen AT cosmos.buffalo DOT edu]
Sent: mercredi 15 mai 2002 17:53
To: Carlos Perales
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Fragment Size
Hello Carlos
The Fragemnet size has affect if you are planning
to backup to disk storage unit.
It is the Max size of the file it will create to store
your backup. In the "old days" there is a limited of
a single large file of max 2G. If you lower the
Frag size to like 1G, and your backup is total 5G,
it will create Five, 1 G files in that specific
directory.
There is no frag size for tape storgae unit. (0)
It doesn't matter how big, just store to there.
And, yes you have to change/update your storage unit.
thx
Mike
On Wed, 15 May 2002, Carlos Perales wrote:
>
>
>
> Hi,
>
> I've a question.
>
> How does fragment size affects backups ?
> What are the pros and cons ?
>
> Is there like a "better" fragment size setting ?
>
> In case of making this modification, Do I only have to change the
setting to the
> storage unit ?
>
> THanks,
> Carlos
>
>
>
> _______________________________________________
> Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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<HTML><HEAD><TITLE>RE: [Veritas-bu] Fragment Size</TITLE>
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<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D060004922-15052002>Check=20
again on your negative ... normal end-of-tape processing is performed =
regardless=20
of whether you record one big fragment or many small =
ones.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D060004922-15052002></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D060004922-15052002>Regards,</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D060004922-15052002>-Brian</SPAN></FONT></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B>=20
veritas-bu-admin AT mailman.eng.auburn DOT edu=20
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]<B>On Behalf Of =
</B>Brochart,=20
Fabrice<BR><B>Sent:</B> Wednesday, May 15, 2002 11:15 AM<BR><B>To:</B> =
'Michael Suen'; Carlos Perales<BR><B>Cc:</B>=20
veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B> RE: [Veritas-bu] =
Fragment=20
Size<BR><BR></FONT></DIV>
<P> <FONT size=3D2>Hi =
all,</FONT> </P>
<P><FONT size=3D2>I've never tested that ,but customer said me that =
you can=20
create fragment for tape to "accelerate" restore !</FONT> </P>
<P><FONT size=3D2>Take a look at the SAG page 643.</FONT> </P>
<P><FONT size=3D2>But the negative point is, if you arrive at the end =
of tape=20
and you can't finish write your fragment(EOT detected !!), then you =
have to=20
rewrite the whole fragment.</FONT></P>
<P><FONT size=3D2>Hth</FONT> </P>
<P><FONT size=3D2>F@b</FONT> </P><BR><BR>
<P><FONT size=3D2>-----Original Message-----</FONT> <BR><FONT =
size=3D2>From:=20
Michael Suen [<A=20
=
href=3D"mailto:suen AT cosmos.buffalo DOT edu">mailto:suen AT cosmos.buffalo
DOT edu</A=
>]</FONT>=20
<BR><FONT size=3D2>Sent: mercredi 15 mai 2002 17:53</FONT> <BR><FONT =
size=3D2>To:=20
Carlos Perales</FONT> <BR><FONT size=3D2>Cc:=20
veritas-bu AT mailman.eng.auburn DOT edu</FONT> <BR><FONT size=3D2>Subject: =
Re:=20
[Veritas-bu] Fragment Size</FONT> </P><BR>
<P> <FONT size=3D2>Hello =
Carlos</FONT>=20
</P>
<P> <FONT size=3D2>The =
Fragemnet size=20
has affect if you are planning</FONT>=20
<BR> <FONT size=3D2>to =
backup to disk=20
storage unit.</FONT> </P>
<P> <FONT size=3D2>It is the =
Max size=20
of the file it will create to store</FONT>=20
<BR> <FONT size=3D2>your =
backup. In=20
the "old days" there is a limited of</FONT>=20
<BR> <FONT size=3D2>a single =
large=20
file of max 2G. If you lower the</FONT>=20
<BR> <FONT size=3D2>Frag =
size to like=20
1G, and your backup is total 5G,</FONT>=20
<BR> <FONT size=3D2>it will =
create=20
Five, 1 G files in that specific=20
</FONT><BR> <FONT=20
size=3D2>directory.</FONT> </P>
<P> <FONT size=3D2>There is =
no frag=20
size for tape storgae unit. (0)</FONT>=20
<BR> <FONT size=3D2>It =
doesn't matter=20
how big, just store to there.</FONT> </P>
<P> <FONT size=3D2>And, yes =
you have=20
to change/update your storage unit.</FONT> </P>
<P> <FONT =
size=3D2>thx</FONT> </P>
<P> =20
=20
<FONT size=3D2>Mike</FONT> =
</P>
<P><FONT size=3D2>On Wed, 15 May 2002, Carlos Perales wrote:</FONT> =
</P>
<P><FONT size=3D2>> </FONT><BR><FONT size=3D2>> </FONT><BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> Hi,</FONT> <BR><FONT size=3D2>> =
</FONT><BR><FONT=20
size=3D2>> I've a question.</FONT> <BR><FONT size=3D2>> =
</FONT><BR><FONT=20
size=3D2>> How does fragment size affects backups ?</FONT> =
<BR><FONT=20
size=3D2>> What are the pros and cons ?</FONT> <BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> Is there like a "better" fragment size =
setting=20
?</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>> In =
case of making=20
this modification, Do I only have to change the setting to the</FONT>=20
<BR><FONT size=3D2>> storage unit ?</FONT> <BR><FONT size=3D2>>=20
</FONT><BR><FONT size=3D2>> THanks,</FONT> <BR><FONT size=3D2>>=20
Carlos</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>>=20
</FONT><BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>>=20
_______________________________________________</FONT> <BR><FONT =
size=3D2>>=20
Veritas-bu maillist - =
Veritas-bu AT mailman.eng.auburn DOT edu</FONT>=20
<BR><FONT size=3D2>> <A=20
href=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu"=20
=
target=3D_blank>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu=
</A></FONT>=20
<BR><FONT size=3D2>> </FONT></P><BR><BR><BR>
<P><FONT =
size=3D2>_______________________________________________</FONT>=20
<BR><FONT size=3D2>Veritas-bu maillist - =20
Veritas-bu AT mailman.eng.auburn DOT edu</FONT> <BR><FONT size=3D2><A=20
href=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu"=20
=
target=3D_blank>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu=
</A></FONT>=20
</P></BLOCKQUOTE></BODY></HTML>
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