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Hi
Thank for your reply. However, a few things to note.
The tapes are supposed to backup at 11mb/s but instead, when we have all
drives backing up the speed drops to 500kb/s, which is very low. Please
advice.
Thanks, Nelson.
=20
-----Original Message-----
From: Kathy Riddlemoser [mailto:kathy AT mitre DOT org]=20
Sent: Thursday, November 07, 2002 4:10 PM
To: Nelson Kawumi; veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] slow backups
=20
This is what I understand from your note. You have 1 Master server =
(Win2k)
and 5 Media servers (4 Win2k + 1 Unix) and according to your note they =
all
use the same SDLT unit which contains 12 drives and the SDLT is attached =
to a
SAN. You're seeing 11mb/sec written to tape.=20
I'm not sure why you are complaining. I've got an LTO that I use to =
back up
1.4TB of data off a Compaq SAN utilizing only one LTO drive (the data is =
all
under one mount point) and it takes 68 hours which turns out to be about =
17
GB an hour and 5 mb/sec. I'd love to see 11 mb/sec.=20
I currently have a ticket open with Veritas to assist me with trying to =
gain
better performance. Here is my layout:=20
1) Master / Media server =3D Ultra2 running Solaris 2.7w/1G mem and =
w/Qualstar
6460 4 DLT drives backing up unix, linux and windows clients. No big =
deal
under this situation. I'm very happy with speed and time (upgrading to =
Sun
220R, Solaris 2.7, 2G mem and 2 450 CPUs)=20
2) Media server =3D Dell 1650, 2G mem, 2 450 CPU's (heck of a lot more =
than the
Master's got above) with an Overland Neo series LTO (2 drives & 30 =
slots).
This is also a Netbackup Professional NBUP server. It's storage is 2 TB =
on a
Compaq SAN with direct fiber connection to this box and I'm only writing =
17
GB an hour. However, it starts out at 40 Gig and then drops.=20
Some of the things I'm doing......=20
1) updating drivers (if needed) on library and its drives=20
2) updating firmware (if needed) on library and its drives=20
3) I do have all the latest NBU v3.4.1 patches, but am double checking=20
3) turn off anti-virus software that might run during backup=20
4) turn off NBUPclient connections to the server over the weekend and =
see if
backup improves (NBUP clients backup to SAN and then I backup the data =
to
tape).=20
5) identify any other services that may be running that can be stopped =
during
backup window.=20
Now, if you can be more specific to what media server, what type of data
you're backing up that will help. Are you backing up data straight from =
the
client to tape? If so, what kind of network connection do you have. =
Might
want to lock your network switch and server down to 100mb/full duplex. =
You
may be transporting at 10 versus 100 and even at half duplex.=20
Are you backing up a ton of very small files. This in it self is a =
major
problem. Alot of small files take longer to back up than large ones. I
don't think I resolved things for you,but may be have given you some =
other
avenues to venture down.=20
Regards,=20
Kathy=20
=20
kawumin AT mtn.co DOT ug wrote:=20
Hi
I have a windows 2000 advanced server master server, 4 windows 2000 =
advanced
server media servers and 2 tru64 UNIX media servers. I 'm using Veritas
Netbackup Datacenter v3.4.1 with patches;=20
For Microsoft Windows (all version) the latest patch is -
NB_341_4.winnt.intel_250246.exe=20
For TRU64 the latest patch is- NB_34_3.clients_246589.tar (this patch
provides fixes for both UNIX server and clients)=20
The master and media servers are connected to the Compaq SL9326 library =
with,
12 SDLT drives, through a Compaq SAN switch, 10Km single fiber link to =
the
Compaq Modular Data router (MDR) and scsi cables from the MDR.=20
I have a problem the backups take so long when running, the speeds drop =
per
stream to 500kb/sec. which is very low. Yet the speed for a native =
backup
(which we use) for and SDLT tape drive is 11mb/sec. please help!!=20
Thanks, Nelson.
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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Hi<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Thank for your reply. However, a =
few
things to note.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>The tapes are supposed to backup at =
11mb/s
but instead, when we have all drives backing up the speed drops to =
500kb/s,
which is very low. Please advice.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Thanks, =
Nelson.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b> Kathy Riddlemoser
[mailto:kathy AT mitre DOT org] <br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, November =
07, 2002
4:10 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> Nelson Kawumi;
veritas-bu AT mailman.eng.auburn DOT edu<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: [Veritas-bu] =
slow
backups</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>This is what I understand from your =
note. You
have 1 Master server (Win2k) and 5 Media servers (4 Win2k + 1 Unix) and
according to your note they all use the same SDLT unit which contains 12 =
drives
and the SDLT is attached to a SAN. You're seeing 11mb/sec written =
to
tape. <o:p></o:p></span></font></p>
<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>I'm not sure why you are complaining. =
I've got
an LTO that I use to back up 1.4TB of data off a Compaq SAN utilizing =
only one
LTO drive (the data is all under one mount point) and it takes 68 hours =
which
turns out to be about 17 GB an hour and 5 mb/sec. I'd love to see =
11
mb/sec. <o:p></o:p></span></font></p>
<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>I currently have a ticket open with Veritas =
to assist
me with trying to gain better performance. Here is my layout: <br>
1) Master / Media server =3D Ultra2 running Solaris 2.7w/1G mem and =
w/Qualstar
6460 4 DLT drives backing up unix, linux and windows clients. No =
big deal
under this situation. I'm very happy with speed and time =
(upgrading to
Sun 220R, Solaris 2.7, 2G mem and 2 450 CPUs) <br>
2) Media server =3D Dell 1650, 2G mem, 2 450 CPU's (heck of a lot more =
than the
Master's got above) with an Overland Neo series LTO (2 drives =
& 30
slots). This is also a Netbackup Professional NBUP server. =
It's
storage is 2 TB on a Compaq SAN with direct fiber connection to this box =
and
I'm only writing 17 GB an hour. However, it starts out at 40 Gig =
and then
drops. <o:p></o:p></span></font></p>
<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>Some of the things I'm doing...... <br>
1) updating drivers (if needed) on library and its drives <br>
2) updating firmware (if needed) on library and its drives <br>
3) I do have all the latest NBU v3.4.1 patches, but am double checking =
<br>
3) turn off anti-virus software that might run during backup <br>
4) turn off NBUPclient connections to the server over the weekend and =
see if
backup improves (NBUP clients backup to SAN and then I backup the data =
to
tape). <br>
5) identify any other services that may be running that can be stopped =
during
backup window. <o:p></o:p></span></font></p>
<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>Now, if you can be more specific to what =
media server,
what type of data you're backing up that will help. Are you =
backing up
data straight from the client to tape? If so, what kind of network
connection do you have. Might want to lock your network =
switch and
server down to 100mb/full duplex. You may be transporting at =
10
versus 100 and even at half duplex. <o:p></o:p></span></font></p>
<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>Are you backing up a ton of very small =
files. This
in it self is a major problem. Alot of small files take longer to =
back up
than large ones. I don't think I resolved things for you,but may =
be have
given you some other avenues to venture down. =
<o:p></o:p></span></font></p>
<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>Regards, <br>
Kathy <br>
<o:p></o:p></span></font></p>
<p style=3D'margin-left:.5in'><font size=3D3 face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt'>kawumin AT mtn.co DOT ug wrote: =
<o:p></o:p></span></font></p>
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<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>Hi<u3:p></u3:p><o:p></o:p></span></font></p>
</div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>I have a windows 2000 advanced server master =
server, 4
windows 2000 advanced server media servers and 2 tru64 UNIX media =
servers. I
‘m using Veritas Netbackup Datacenter v3.4.1 with =
patches;<u3:p></u3:p> <o:p></o:p></span></font></p>
<p class=3DMsoNormal =
style=3D'margin-left:.5in;mso-layout-grid-align:none;
text-autospace:none'><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt;font-family:"Courier New"'>For Microsoft Windows (all version) =
the
latest patch is - =
NB_341_4.winnt.intel_250246.exe<u3:p></u3:p></span></font> =
<o:p></o:p></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3D"Courier New"><span
style=3D'font-size:10.0pt;font-family:"Courier New"'><u3:p></u3:p>For =
TRU64 the
latest patch is- NB_34_3.clients_246589.tar (this patch provides =
fixes for
both UNIX server and clients)<u3:p></u3:p></span></font> <o:p></o:p></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3D"Courier New"><span
style=3D'font-size:10.0pt;font-family:"Courier New"'>The master and =
media servers
are connected to the Compaq SL9326 library with, 12 SDLT drives, through =
a
Compaq SAN switch, 10Km single fiber link to the Compaq Modular Data =
router
(MDR) and scsi cables from the MDR.<u3:p></u3:p></span></font> =
<o:p></o:p></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3D"Courier New"><span
style=3D'font-size:10.0pt;font-family:"Courier New"'>I have a problem =
the backups
take so long when running, the speeds drop per stream to 500kb/sec. =
which is
very low. Yet the speed for a native backup (which we use) for and SDLT =
tape
drive is 11mb/sec. please help!!<u3:p></u3:p></span></font> =
<o:p></o:p></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3D"Courier New"><span
style=3D'font-size:10.0pt;font-family:"Courier New"'>Thanks, =
Nelson.</span></font><u3:p></u3:p><o:p></o:p></p>
</blockquote>
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