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[Veritas-bu] backup speed
2006-03-20 07:13:50
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PS "Firstly I'd recommend you configure your multiplexing to use only one
drive at least to begin with, if you think you really pushing enough data
off the client to drive two then you can set that later. " - to do this
you need to set multiplexing to at least 4 in your storage unit and on the
backup policy schedule (currently it sounds like you have no multiplexing
at all).
Andrew X Smith
20/03/2006 12:03
To: "Atif Munir" <atif76 AT gmail DOT com>, veritas-bu AT
mailman.eng.auburn DOT edu
cc:
Subject: Re: [Veritas-bu] backup speed
Ok,
then there are a few things to point out, firstly with a single client
typically you will struggle to get anywhere near saturating a gigabit
connection just to set your expectations, but you should still get better
than you are seeing. Secondly you are using a database agent and these
often adversely affect performance.
However Im sure you can improve things, heres a few suggestions to start
with.
Firstly I'd recommend you configure your multiplexing to use only one
drive at least to begin with, if you think you really pushing enough data
off the client to drive two then you can set that later.
You also really need to set the buffers on the media (this is your master
I think?) server, this is done by setting a value in the files (which do
not exist by default) in /usr/openv/netbackup/db/config
NUMBER_DATA_BUFFERS and SIZE_DATA_BUFFERS. For LTO3 a good starting point
for these might be number=64 and size=262144.
You may also need to make changes to your /etc/system file as these
settings require sufficient system shared memory to be available, you can
find recommended settings on support.veritas.com or I can tell you what I
have used??
Also you can change the buffer size on the RMAN side too, again I can help
you out if you don't know how to do this,
cheers Andy.
"Atif Munir" <atif76 AT gmail DOT com>
20/03/2006 11:53
To: "andrew.x.smith AT jpmchase DOT com" <andrew.x.smith AT
jpmchase DOT com>
cc:
Subject: Re: [Veritas-bu] backup speed
I am getting 100Mbits per sec.
I have only one client connect to the gigabit switch. and to backup 1.7TB
of data it takes about 9 hours. either i use 3 drives or 4.
My mrtg graphs shows that I could not use more than 100Mbits per sec.
I am using rman netbackup so the option of "Allow multiple data stream is
not highlighted but i am using 4 channels to backup data.
I have no idea where i can see NBU buffer size.
Regards,
atif
On 3/20/06, andrew.x.smith AT jpmchase DOT com <andrew.x.smith AT jpmchase DOT
com > wrote:
Hi Atif,
Do you mean 100Mbytes or 100Mbits a second? Maximum theoretical through
put of 1000baseT is 1000/8=125MBytes a second so 100MBytes would be very
good, in contrast if you are getting only 100Mbits then that is failry
poor - in this instance please post some additional information about your
config as this is a very complex issue. Ie are the clients also connected
on gigabit ethernet, how many clients are there, what are your
multiplexing settings, what are your NBU buffer settings, etc, etc, etc
cheers Andy.
"Atif Munir" <atif76 AT gmail DOT com>
Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu
20/03/2006 10:57
To: veritas-bu AT mailman.eng.auburn DOT edu
cc:
Subject: [Veritas-bu] backup speed
I have a gigabit ethernet. Recently i have installed 5 LTO Gen 3
drives. But I am not getting a very good speed. As a total I am
getting 100Mb/sec, and it take a lot of time to finish my backup.
Why I could not get a good speed.
Regards,
atif
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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<br><font size=2 face="sans-serif">PS "Firstly I'd recommend you configure
your multiplexing to use only one drive at least to begin with, if you think
you really pushing enough data off the client to drive two then you can set
that later. " - to do this you need to set multiplexing to at least 4 in
your storage unit and on the backup policy schedule (currently it sounds like
you have no multiplexing at all).</font>
<br>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td>
<td><font size=1 face="sans-serif"><b>Andrew X Smith</b></font>
<p><font size=1 face="sans-serif">20/03/2006 12:03</font>
<br>
<td>
<br><font size=1 face="sans-serif"> To:
"Atif Munir" <atif76 AT gmail DOT com>,
veritas-bu AT mailman.eng.auburn DOT edu</font>
<br><font size=1 face="sans-serif"> cc:
</font>
<br><font size=1 face="sans-serif"> Subject:
Re: [Veritas-bu] backup speed</font><a
href=Notes:///80256FF100348B4F/DABA975B9FB113EB852564B5001283EA/84CDE5A7FF3E79EB852571370041542C>Link</a></table>
<br>
<br><font size=2 face="sans-serif">Ok,</font>
<br>
<br><font size=2 face="sans-serif"> then there are a few things to point
out, firstly with a single client typically you will struggle to get anywhere
near saturating a gigabit connection just to set your expectations, but you
should still get better than you are seeing. Secondly you are using a database
agent and these often adversely affect performance. </font>
<br>
<br><font size=2 face="sans-serif">However Im sure you can improve things,
heres a few suggestions to start with. </font>
<ul>
<li><font size=2 face="sans-serif">Firstly I'd recommend you configure your
multiplexing to use only one drive at least to begin with, if you think you
really pushing enough data off the client to drive two then you can set that
later. </font>
<li><font size=2 face="sans-serif">You also really need to set the buffers on
the media (this is your master I think?) server, this is done by setting a
value in the files (which do not exist by default) in
/usr/openv/netbackup/db/config NUMBER_DATA_BUFFERS and SIZE_DATA_BUFFERS. For
LTO3 a good starting point for these might be number=64 and size=262144. </font>
<li><font size=2 face="sans-serif">You may also need to make changes to your
/etc/system file as these settings require sufficient system shared memory to
be available, you can find recommended settings on support.veritas.com or I can
tell you what I have used?? </font>
<li><font size=2 face="sans-serif">Also you can change the buffer size on the
RMAN side too, again I can help you out if you don't know how to do this,</font>
<br>
<br><font size=2 face="sans-serif">
cheers Andy.</font>
<br>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td>
<td><font size=1 face="sans-serif"><b>"Atif Munir" <atif76 AT
gmail DOT com></b></font>
<p><font size=1 face="sans-serif">20/03/2006 11:53</font>
<br>
<td><font size=1 face="Arial"> </font>
<br><font size=1 face="sans-serif"> To:
"andrew.x.smith AT jpmchase DOT com"
<andrew.x.smith AT jpmchase DOT com></font>
<br><font size=1 face="sans-serif"> cc:
</font>
<br><font size=1 face="sans-serif"> Subject:
Re: [Veritas-bu] backup speed</font></table>
<br>
<br>
<br><font size=3 face="Times New Roman">I am getting 100Mbits per sec. <br>
I have only one client connect to the gigabit switch. and to backup 1.7TB of
data it takes about 9 hours. either i use 3 drives or 4.<br>
<br>
My mrtg graphs shows that I could not use more than 100Mbits per sec.<br>
I am using rman netbackup so the option of "Allow multiple data stream is
not highlighted but i am using 4 channels to backup data.<br>
<br>
I have no idea where i can see NBU buffer size.<br>
<br>
Regards,<br>
atif<br>
</font>
<br><font size=3 face="Times New Roman">On 3/20/06, </font><a
href=mailto:andrew.x.smith AT jpmchase DOT com><font size=3 color=blue
face="Times New Roman"><b><u>andrew.x.smith AT jpmchase DOT
com</u></b></font></a><font size=3 face="Times New Roman"> <</font><a
href=mailto:andrew.x.smith AT jpmchase DOT com><font size=3 color=blue
face="Times New Roman"><u>andrew.x.smith AT jpmchase DOT com
</u></font></a><font size=3 face="Times New Roman">> wrote:</font>
<br><font size=2 face="sans-serif"><br>
Hi Atif,</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="sans-serif"><br>
Do you mean 100Mbytes or 100Mbits a second? Maximum theoretical through
put of 1000baseT is 1000/8=125MBytes a second so 100MBytes would be very good,
in contrast if you are getting only 100Mbits then that is failry poor - in this
instance please post some additional information about your config as this is a
very complex issue. Ie are the clients also connected on gigabit ethernet, how
many clients are there, what are your multiplexing settings, what are your NBU
buffer settings, etc, etc, etc</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="sans-serif"><br>
cheers
Andy.</font><font size=3 face="Times New Roman"> <br>
<br>
<br>
<br>
</font>
<table width=100%>
<tr valign=top>
<td width=2%>
<td width=49%><font size=1 face="sans-serif"><b>"Atif Munir"
<</b></font><a href=mailto:atif76 AT gmail DOT com target=_blank><font
size=1 color=blue face="sans-serif"><b><u>atif76 AT gmail DOT
com</u></b></font></a><font size=1 face="sans-serif"><b>></b></font><font
size=3 face="Times New Roman"> </font><font size=1 face="sans-serif"><br>
Sent by: </font><a href="mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu"
target=_blank><font size=1 color=blue face="sans-serif"><u>veritas-bu-admin AT
mailman.eng.auburn DOT edu</u></font></a><font size=3 face="Times New Roman">
</font>
<p><font size=1 face="sans-serif">20/03/2006 10:57</font><font size=3
face="Times New Roman"> </font>
<td width=47%><font size=1 face="Arial">
</font><font size=1 face="sans-serif"><br>
To: </font><a
href="mailto:veritas-bu AT mailman.eng.auburn DOT edu" target=_blank><font
size=1 color=blue face="sans-serif"><u>veritas-bu AT mailman.eng.auburn DOT
edu</u></font></a><font size=3 face="Times New Roman"> </font>
<br><font size=1 face="sans-serif"> cc:
</font><font size=3 face="Times New Roman"> </font>
<br><font size=1 face="sans-serif"><br>
Subject: [Veritas-bu]
backup speed</font></table>
<br><font size=3 face="Times New Roman"><br>
<br>
</font><font size=2 face="Courier New"><br>
I have a gigabit ethernet. Recently i have installed 5 LTO Gen 3<br>
drives. But I am not getting a very good speed. As a total I am<br>
getting 100Mb/sec, and it take a lot of time to finish my backup.<br>
<br>
Why I could not get a good speed.<br>
<br>
Regards,<br>
atif<br>
<br>
_______________________________________________<br>
Veritas-bu maillist - </font><a href="mailto:Veritas-bu AT
mailman.eng.auburn DOT edu" target=_blank><font size=2 color=blue face="Courier
New"><u>Veritas-bu AT mailman.eng.auburn DOT edu</u></font></a><font size=2
color=blue face="Courier New"><u><br>
</u></font><a href="http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu";
target=_blank><font size=2 color=blue face="Courier
New"><u>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu</u></font></a><font
size=3 face="Times New Roman"><br>
<br>
</font>
<br>
<br>
<br>
<br>
<br></ul>
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