[Veritas-bu] 9940B config in a L700
2003-04-30 05:05:40
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Travis,
=20
All your drives are direct connect or via fiber switch ??
=20
It seems that all your NetBackup tuning parameters are good so,did you =
try,
as Paul mentioned it, some trivial tests.
=20
Speed disk test with dd command, and tape tests (even with DLT drive).
=20
Fabrice
-----Message d'origine-----
De : Paul Winkeler [mailto:pwinkeler AT pbnj-solutions DOT com]
Envoy=E9 : mardi 29 avril 2003 21:30
=C0 : 'Rosamond, Travis'
Cc : 'Veritas-Bu (E-mail)'
Objet : RE: [Veritas-bu] 9940B config in a L700
Travis
=20
I'll second what the two other gentlemen already mentioned. Since you =
don't
say anything about restore operations failing I am assuming you already =
had
the SIZE_DATA_BUFFERS set properly. The number of buffers is still key
though.
=20
Try this experiment on one of your T9940B drives:
dd if=3D/dev/zero bs=3D1024k count=3D2048 of=3D/dev/rmt/<num>cbn
and use iostat -xn to monitor the write throughput to the drive. I =
have
seen speeds of up to 69MByte/sec this way.
=20
By the way what class sun machine are running this on?
=20
PaulW
=20
www.pbnj-solutions.com <http://www.pbnj-solutions.com/> IT Solutions =
That
Stick
(216) 533-5708
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<DIV><SPAN class=3D567093908-30042003><FONT size=3D2> =
Travis,</FONT></SPAN></DIV>
<DIV><SPAN class=3D567093908-30042003><FONT =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D567093908-30042003><FONT size=3D2>All your drives =
are direct=20
connect or via fiber switch ??</FONT></SPAN></DIV>
<DIV><SPAN class=3D567093908-30042003><FONT =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D567093908-30042003><FONT size=3D2>It seems that all =
your=20
NetBackup tuning parameters are good so,did you try, as Paul mentioned =
it, some=20
trivial tests.</FONT></SPAN></DIV>
<DIV><SPAN class=3D567093908-30042003><FONT =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D567093908-30042003><FONT size=3D2>Speed disk test =
with dd=20
command, and tape tests (even with DLT drive).</FONT></SPAN></DIV>
<DIV><SPAN class=3D567093908-30042003><FONT =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D567093908-30042003><FONT =
size=3D2>Fabrice</FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Message d'origine-----<BR><B>De :</B> Paul =
Winkeler=20
[mailto:pwinkeler AT pbnj-solutions DOT com]<BR><B>Envoy=E9 :</B> mardi =
29 avril=20
2003 21:30<BR><B>=C0 :</B> 'Rosamond, =
Travis'<BR><B>Cc :</B>=20
'Veritas-Bu (E-mail)'<BR><B>Objet :</B> RE: [Veritas-bu] 9940B =
config in=20
a L700<BR><BR></FONT></DIV>
<DIV><SPAN class=3D937152419-29042003><FONT =
size=3D2>Travis</FONT></SPAN></DIV>
<DIV><SPAN class=3D937152419-29042003><FONT =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D937152419-29042003><FONT size=3D2>I'll second what =
the two=20
other gentlemen already mentioned. Since you don't say anything =
about=20
restore operations failing I am assuming you already had the <FONT=20
size=3D2>SIZE_DATA_BUFFERS set properly. The number of buffers =
is still=20
key though.</FONT></FONT></SPAN></DIV>
<DIV><SPAN class=3D937152419-29042003><FONT =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D937152419-29042003><FONT size=3D2>Try this =
experiment on one of=20
your T9940B drives:</FONT></SPAN></DIV>
<DIV><SPAN class=3D937152419-29042003> <FONT =
size=3D2>dd=20
if=3D/dev/zero bs=3D1024k count=3D2048=20
of=3D/dev/rmt/<num>cbn</FONT></SPAN></DIV>
<DIV><SPAN class=3D937152419-29042003><FONT size=3D2>and use iostat =
-xn to monitor=20
the write throughput to the drive. I have seen speeds of up to=20
69MByte/sec this way.</FONT></SPAN></DIV>
<DIV><SPAN class=3D937152419-29042003><FONT =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D937152419-29042003><FONT size=3D2>By the way what =
class sun=20
machine are running this on?</FONT></SPAN></DIV>
<DIV><SPAN class=3D937152419-29042003><FONT =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D937152419-29042003><FONT=20
size=3D2> PaulW</FONT></SPAN></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV align=3Dleft><FONT size=3D2><A=20
href=3D"http://www.pbnj-solutions.com/">www.pbnj-solutions.com</A> IT =
Solutions=20
That Stick</FONT></DIV>
<DIV align=3Dleft><FONT size=3D2>(216)=20
533-5708</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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- [Veritas-bu] 9940B config in a L700, Rosamond, Travis
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- [Veritas-bu] 9940B config in a L700, Brochart, Fabrice
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- [Veritas-bu] 9940B config in a L700, Donaldson, Mark
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