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BTW, I think your maths is a bit wrong:

1.7TB of data it takes about 9 hours

((1782579.2Mb/9)/60)/60 = 55Mbytes a second = 440Mbits a second. This 
isn't bad.....  Maybe ur MRTG is somehow limited to showing 100Mb as its 
maximum value????






"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">BTW, I think your maths is a bit 
wrong:</font>
<br>
<br><font size=3 face="Times New Roman">1.7TB of data it takes about 9 
hours</font>
<br>
<br><font size=2 face="sans-serif">((1782579.2Mb/9)/60)/60 = 55Mbytes a second 
= 440Mbits a second. This isn't bad..... &nbsp;Maybe ur MRTG is somehow limited 
to showing 100Mb as its maximum value????</font>
<br>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td>
<td><font size=1 face="sans-serif"><b>&quot;Atif Munir&quot; &lt;atif76 AT 
gmail DOT com&gt;</b></font>
<p><font size=1 face="sans-serif">20/03/2006 11:53</font>
<br>
<td><font size=1 face="Arial">&nbsp; &nbsp; &nbsp; &nbsp; </font>
<br><font size=1 face="sans-serif">&nbsp; &nbsp; &nbsp; &nbsp; To: &nbsp; 
&nbsp; &nbsp; &nbsp;&quot;andrew.x.smith AT jpmchase DOT com&quot; 
&lt;andrew.x.smith AT jpmchase DOT com&gt;</font>
<br><font size=1 face="sans-serif">&nbsp; &nbsp; &nbsp; &nbsp; cc: &nbsp; 
&nbsp; &nbsp; &nbsp;</font>
<br><font size=1 face="sans-serif">&nbsp; &nbsp; &nbsp; &nbsp; Subject: &nbsp; 
&nbsp; &nbsp; &nbsp;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 &quot;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"> &lt;</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">&gt; 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>
 &nbsp;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>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;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>&quot;Atif Munir&quot; 
&lt;</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>&gt;</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">&nbsp; &nbsp; &nbsp; &nbsp; 
</font><font size=1 face="sans-serif"><br>
 &nbsp; &nbsp; &nbsp; &nbsp;To: &nbsp; &nbsp; &nbsp; &nbsp;</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">&nbsp; &nbsp; &nbsp; &nbsp; cc: &nbsp; 
&nbsp; &nbsp; &nbsp;</font><font size=3 face="Times New Roman"> </font>
<br><font size=1 face="sans-serif"><br>
 &nbsp; &nbsp; &nbsp; &nbsp;Subject: &nbsp; &nbsp; &nbsp; &nbsp;[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 &nbsp;- &nbsp;</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>
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