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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.
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.
I currently have a ticket open with Veritas to assist me with trying to
gain better performance. Here is my layout:
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)
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.
Some of the things I'm doing......
1) updating drivers (if needed) on library and its drives
2) updating firmware (if needed) on library and its drives
3) I do have all the latest NBU v3.4.1 patches, but am double checking
3) turn off anti-virus software that might run during backup
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).
5) identify any other services that may be running that can be stopped
during backup window.
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.
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.
Regards,
Kathy
kawumin AT mtn.co DOT ug wrote:
> Hi
>
> I have a windows 2000 advanced server master server, 4 windows 2000
> advanced server media servers and 2 tru64 UNIX media servers. I =91m
> using Veritas Netbackup Datacenter v3.4.1 with patches;
>
> For Microsoft Windows (all version) the latest patch is -
> NB_341_4.winnt.intel_250246.exe
>
> For TRU64 the latest patch is- NB_34_3.clients_246589.tar (this patch
> provides fixes for both UNIX server and clients)
>
> 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.
>
> 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!!
>
> Thanks, Nelson.
>
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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.
<p>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/s=
ec.
<p>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 mor=
e
than the Master's got above) with an Overland Neo series LTO (2 dri=
ves
& 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.
<p>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 checkin=
g
<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 stoppe=
d
during backup window.
<p>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 stra=
ight
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 vers=
us
100 and even at half duplex.
<p>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.
<p>Regards,
<br>Kathy
<br>
<p>kawumin AT mtn.co DOT ug wrote:
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<div class=3DSection1>
<div class=3D"MsoNormal"><span style=3D'font-size:
12.0pt'><font face=3D"Times New Roman"><font size=3D+0>Hi</font></font><o=
:p></o:p></span></div>
<p class=3D"MsoNormal"><span style=3D'font-size:
12.0pt'><font face=3D"Times New Roman"><font size=3D+0>I
have a windows 2000 advanced server master server, 4 windows 2000 advance=
d
server media servers and 2 tru64 UNIX media servers. I =91m using Veritas=
Netbackup Datacenter v3.4.1 with patches;</font></font><o:p></o:p></span>=
<p class=3D"MsoNormal" style=3D"mso-layout-grid-align:none;text-autospace=
:none"><span style=3D'font-size:10.0pt;font-family:"Courier New"'><font f=
ace=3D"Courier New"><font size=3D-1>For
Microsoft Windows (all version) the latest patch is - NB_341_4.winnt.inte=
l_250246.exe</font></font><o:p></o:p></span>
<p class=3D"MsoNormal" style=3D"mso-layout-grid-align:none;text-autospace=
:none"><span style=3D'font-size:10.0pt;font-family:"Courier New"'><o:p></=
o:p></span>
<p class=3D"MsoNormal"><span style=3D'font-size:10.0pt;
font-family:"Courier New"'><font face=3D"Courier New"><font size=3D-1>For=
TRU64 the latest patch <span class=3DGramE>is<span =
style=3D'mso-spacerun:yes'></span>-</span>
NB_34_3.clients_246589.tar (this patch provides fixes for both UNIX serve=
r
and clients)</font></font><o:p></o:p></span>
<p class=3D"MsoNormal"><span style=3D'font-size:10.0pt;
font-family:"Courier New"'><font face=3D"Courier New"><font size=3D-1>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 <span class=3DGramE>scsi</s=
pan>
cables from the MDR.</font></font><o:p></o:p></span>
<p class=3D"MsoNormal"><span style=3D'font-size:10.0pt;
font-family:"Courier New"'><font face=3D"Courier New"><font size=3D-1>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!!</font><=
/font><o:p></o:p></span>
<p class=3D"MsoNormal"><span style=3D'font-size:10.0pt;
font-family:"Courier New"'><font face=3D"Courier New"><font size=3D-1>Tha=
nks,
Nelson.</font></font></span><o:p></o:p></div>
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