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Good suggestions. For clarification, though, the requester is seeing speeds
drop to 500 kb/sec and saying the native speed is 11 mb/s.
With respect to suggestion 3, does anybody worry about turning off virus
protection during backups? Among other things, I have about 50 million
files with an average size of 50K on various RAID 5 LUNs. I see respectable
backup times, but would like to speed them up. I've considered stopping
virus protection, but I just can't bring myself to do it. Comments?
Thanks,
Matt
-----Original Message-----
From: Kathy Riddlemoser [mailto:kathy AT mitre DOT org]
Sent: Thursday, November 07, 2002 8:10 AM
To: kawumin AT mtn.co DOT ug; veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] slow backups
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 = 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 = 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 'm 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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<DIV>
<DIV><SPAN class=992341613-07112002><FONT face=Arial><FONT color=#0000ff><FONT
size=2><SPAN class=136131713-07112002>Good suggestions. For
clarification,
though, </SPAN><SPAN class=136131713-07112002>the requester is
</SPAN>seeing<SPAN class=136131713-07112002> speeds drop to </SPAN>500<SPAN
class=136131713-07112002> </SPAN>kb/sec and saying the native speed<SPAN
class=136131713-07112002> </SPAN>is 11<SPAN class=136131713-07112002>
</SPAN>mb/s.</FONT></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=992341613-07112002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=992341613-07112002><FONT face=Arial color=#0000ff size=2><SPAN
class=136131713-07112002>With respect to suggestion 3, does anybody worry about
turning off virus protection during backups? Among other things, I have
about 50 million files with an average size of 50K on various RAID 5
LUNs.
I see respectable backup times, but would like to speed them up. I've
considered stopping virus protection, but I just can't bring myself to do
it. Comments?</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=992341613-07112002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=992341613-07112002><SPAN class=136131713-07112002><FONT
face=Arial color=#0000ff size=2>Thanks,</FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=992341613-07112002><FONT face=Arial color=#0000ff
size=2>Matt</FONT></SPAN></DIV>
<DIV><SPAN class=992341613-07112002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV></DIV>
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Kathy Riddlemoser
[mailto:kathy AT mitre DOT org] <BR><B>Sent:</B> Thursday, November 07, 2002
8:10
AM<BR><B>To:</B> kawumin AT mtn.co DOT ug;
veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B> Re: [Veritas-bu]
slow
backups<BR><BR></FONT></DIV>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/sec.
<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 =
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 = 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.
<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
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.
<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 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.
<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=MsoNormal><SPAN style="FONT-SIZE: 12pt"><FONT
face="Times New Roman"><FONT size=+0>Hi</FONT></FONT><O:P></O:P></SPAN></DIV>
<P class=MsoNormal><SPAN style="FONT-SIZE: 12pt"><FONT
face="Times New Roman"><FONT size=+0>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;</FONT></FONT><O:P></O:P></SPAN>
<P class=MsoNormal style="mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><FONT
face="Courier New"><FONT size=-1>For Microsoft Windows (all version) the
latest patch is -
NB_341_4.winnt.intel_250246.exe</FONT></FONT><O:P></O:P></SPAN>
<P class=MsoNormal style="mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><O:P></O:P></SPAN>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><FONT
face="Courier New"><FONT size=-1>For TRU64 the latest patch <SPAN
class=GramE>is<SPAN style="mso-spacerun: yes"></SPAN>-</SPAN>
NB_34_3.clients_246589.tar (this patch provides fixes for both UNIX server
and
clients)</FONT></FONT><O:P></O:P></SPAN>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><FONT
face="Courier New"><FONT size=-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=GramE>scsi</SPAN> cables from the MDR.</FONT></FONT><O:P></O:P></SPAN>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><FONT
face="Courier New"><FONT size=-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=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><FONT
face="Courier New"><FONT size=-1>Thanks,
Nelson.</FONT></FONT></SPAN><O:P></O:P></P></DIV></BLOCKQUOTE></BODY></HTML>
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