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[Veritas-bu] performance of the STK 9840B tape drive with the SunFire 4800 machine
2003-04-24 12:11:48
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Subject: |
[Veritas-bu] performance of the STK 9840B tape drive with the SunFire 4800 machine |
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From: |
pwinkeler AT pbnj-solutions DOT com (Paul Winkeler) |
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Date: |
Thu, 24 Apr 2003 12:11:48 -0400 |
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Yes we have; although we did not test the QLogic HBA itself we did test
various models from JNI and Emulex in SunFire 880 units and found that
typically 1Mbit/sec HBA's peaked out at about 60MByte/sec when fed with =
more
than one stream of fairly compressible data. With "real" data the rate =
was
somewhat lower yet. Note that we used the new T9940B drives which are =
rated
at a native speed of 30MByte/sec and use the same HBA interface as the
T9840B drives
=20
Paul Winkeler
www.pbnj-solutions.com IT Solutions That Stick
-----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 Vijay =
Korde
Sent: Thursday, April 24, 2003 10:24 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] performance of the STK 9840B tape drive with the
SunFire 4800 machine
Hi to all,
=20
I'm researching the performance of the STK 9840B tape drive with the =
SunFire
4800 machine. We have a Qlogics 2200 HBA and find a throughput =
limitation of
about 60 MB/sec regardless of the number of drives. Has anyone observed
similar problems? What kind of performance have other users seen in this
environment? We're using Veritas Netbackup, but the performance =
limitation
is the same with other software.
=20
Regards,
=20
Vijay
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<DIV><SPAN class=3D450510316-24042003><FONT face=3DArial color=3D#0000ff =
size=3D2>Yes we=20
have; although we did not test the QLogic HBA itself we did test various =
models=20
from JNI and Emulex in SunFire 880 units and found that typically =
1Mbit/sec=20
HBA's peaked out at about 60MByte/sec when fed with more than one stream =
of=20
fairly compressible data. With "real" data the rate was somewhat =
lower=20
yet. Note that we used the new T9940B drives which are rated at a =
native=20
speed of 30MByte/sec and use the same HBA interface as the T9840B=20
drives</FONT></SPAN></DIV>
<DIV><SPAN class=3D450510316-24042003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D450510316-24042003><SPAN =
class=3D872101116-24042003><FONT=20
face=3DArial color=3D#0000ff size=3D2> Paul =
Winkeler</FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D450510316-24042003><SPAN =
class=3D872101116-24042003><FONT=20
face=3DArial color=3D#0000ff size=3D2> <A=20
href=3D"http://www.pbnj-solutions.com";>www.pbnj-solutions.com</A> IT =
Solutions=20
That Stick</FONT></SPAN></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
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<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr =
align=3Dleft><FONT=20
face=3DTahoma 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>Vijay=20
Korde<BR><B>Sent:</B> Thursday, April 24, 2003 10:24 AM<BR><B>To:</B>=20
veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B> [Veritas-bu] =
performance=20
of the STK 9840B tape drive with the SunFire 4800 =
machine<BR><BR></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Hi to all,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>I'm researching the performance of =
the STK 9840B=20
tape drive with the SunFire 4800 machine. We have a Qlogics 2200 HBA =
and find=20
a throughput limitation of about 60 MB/sec regardless of the number of =
drives.=20
Has anyone observed similar problems? What kind of performance have =
other=20
users seen in this environment? We're using Veritas Netbackup, but the =
performance limitation is the same with other software.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Regards,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial =
size=3D2>Vijay</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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