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[Veritas-bu] Fragment Size
2002-05-15 12:14:57
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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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<TITLE>RE: [Veritas-bu] Fragment Size</TITLE>
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<P> <FONT SIZE=3D2>Hi =
all,</FONT>
</P>
<P><FONT SIZE=3D2>I've never tested that ,but customer said me that you =
can 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 and you can't finish write your fragment(EOT detected !!), then =
you have to 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: Michael Suen [<A =
HREF=3D"mailto:suen AT cosmos.buffalo DOT edu">mailto:suen AT cosmos.buffalo
DOT edu</=
A>]</FONT>
<BR><FONT SIZE=3D2>Sent: mercredi 15 mai 2002 17:53</FONT>
<BR><FONT SIZE=3D2>To: Carlos Perales</FONT>
<BR><FONT SIZE=3D2>Cc: veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>Subject: Re: [Veritas-bu] Fragment Size</FONT>
</P>
<BR>
<P> <FONT SIZE=3D2>Hello =
Carlos</FONT>
</P>
<P> <FONT SIZE=3D2>The =
Fragemnet size has affect if you are planning</FONT>
<BR> <FONT SIZE=3D2>to backup =
to disk storage unit.</FONT>
</P>
<P> <FONT SIZE=3D2>It is the =
Max size of the file it will create to store</FONT>
<BR> <FONT SIZE=3D2>your =
backup. In the "old days" there is a limited of</FONT>
<BR> <FONT SIZE=3D2>a single =
large file of max 2G. If you lower the</FONT>
<BR> <FONT SIZE=3D2>Frag size =
to like 1G, and your backup is total 5G,</FONT>
<BR> <FONT SIZE=3D2>it will =
create Five, 1 G files in that specific </FONT>
<BR> <FONT =
SIZE=3D2>directory.</FONT>
</P>
<P> <FONT SIZE=3D2>There is =
no frag size for tape storgae unit. (0)</FONT>
<BR> <FONT SIZE=3D2>It =
doesn't matter how big, just store to there.</FONT>
</P>
<P> <FONT SIZE=3D2>And, yes =
you have to change/update your storage unit.</FONT>
</P>
<P> <FONT SIZE=3D2>thx</FONT>
</P>
<P> =
=
<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>> </FONT>
<BR><FONT SIZE=3D2>> Hi,</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> I've a question.</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> How does fragment size affects backups ?</FONT>
<BR><FONT SIZE=3D2>> What are the pros and cons ?</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> Is there like a "better" fragment =
size setting ?</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> In case of making this modification, Do I only =
have to change the setting to the</FONT>
<BR><FONT SIZE=3D2>> storage unit ?</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> THanks,</FONT>
<BR><FONT SIZE=3D2>> Carlos</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
_______________________________________________</FONT>
<BR><FONT SIZE=3D2>> Veritas-bu maillist - =
Veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>> <A =
HREF=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu"; =
TARGET=3D"_blank">http://mailman.eng.auburn.edu/mailman/listinfo/veritas=
-bu</A></FONT>
<BR><FONT SIZE=3D2>> </FONT>
</P>
<BR>
<BR>
<BR>
<P><FONT =
SIZE=3D2>_______________________________________________</FONT>
<BR><FONT SIZE=3D2>Veritas-bu maillist - =
Veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2><A =
HREF=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu"; =
TARGET=3D"_blank">http://mailman.eng.auburn.edu/mailman/listinfo/veritas=
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