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Hi Dieter,

  When you say "good" I will assume you mean compared to the theoretical 
maximum and compared to what other people can achieve. Well firstly you 
need to consider what the theoretical maximum is for your hardware, 
depending on what type of SDLT you have then u will have a maximum of at 
least 15MB/sec uncompressed, your network will be at least 100Mbit so is 
12.5MB/sec - and your actual throughput is (((512*1024)/23)/60)/60 = 
6.3MB/sec. So in conclusion your performance would not appear to be 
particularly good, particularly if you are using gigabit Ethernet. There 
are of course other factors and I've had to speculate on your config as 
you didn't post sufficient detail,

                cheers Andy.






Deiter Scott <scottd AT HanoverDirect DOT com>
Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu
21/03/2006 20:52

 
        To:     veritas-bu AT mailman.eng.auburn DOT edu
        cc: 
        Subject:        [Veritas-bu] backup speed


I have been watching this discussion and trying to compare with our 
config.
Solaris 9 master/media server with a storagetek robot using SDLT tape.
Many assorted windows and unix clients.
All at 5.1 mp 4
One particular windows client is a NAS file server.  This is backing up 
over a gigabit network.
This is approaching 0.5 terabyte and take 23 hours to backup at 4-5 
Mb/sec.  Not sure what M stands for!
 
I'm trying to determine if this is good or bad.  We can not test a large 
ftp because of the setup on the client.
 
 


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<br><font size=2 face="sans-serif">Hi Dieter,</font>
<br>
<br><font size=2 face="sans-serif">&nbsp; When you say &quot;good&quot; I will 
assume you mean compared to the theoretical maximum and compared to what other 
people can achieve. Well firstly you need to consider what the theoretical 
maximum is for your hardware, depending on what type of SDLT you have then u 
will have a maximum of at least 15MB/sec uncompressed, your network will be at 
least 100Mbit so is 12.5MB/sec - and your actual throughput is 
(((512*1024)/23)/60)/60 = 6.3MB/sec. So in conclusion your performance would 
not appear to be particularly good, particularly if you are using gigabit 
Ethernet. There are of course other factors and I've had to speculate on your 
config as you didn't post sufficient detail,</font>
<br>
<br><font size=2 face="sans-serif">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 
&nbsp; &nbsp; cheers Andy.</font>
<br>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td>
<td><font size=1 face="sans-serif"><b>Deiter Scott &lt;scottd AT HanoverDirect 
DOT com&gt;</b></font>
<br><font size=1 face="sans-serif">Sent by: veritas-bu-admin AT 
mailman.eng.auburn DOT edu</font>
<p><font size=1 face="sans-serif">21/03/2006 20:52</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;veritas-bu AT mailman.eng.auburn DOT edu</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;[Veritas-bu] backup speed</font></table>
<br>
<br>
<br><font size=3 color=#000080 face="Times New Roman">I have been watching this 
discussion and trying to compare with our config.</font>
<br><font size=2 color=#000080 face="Arial">Solaris 9 master/media server with 
a storagetek robot using SDLT tape.</font>
<br><font size=2 color=#000080 face="Arial">Many assorted windows and unix 
clients.</font>
<br><font size=2 color=#000080 face="Arial">All at 5.1 mp 4</font>
<br><font size=2 color=#000080 face="Arial">One particular windows client is a 
NAS file server. &nbsp;This is backing up over a gigabit network.</font>
<br><font size=2 color=#000080 face="Arial">This is approaching 0.5 terabyte 
and take 23 hours to backup at 4-5 Mb/sec. &nbsp;Not sure what M stands 
for!</font>
<br><font size=2 color=#000080 face="Arial">&nbsp;</font>
<br><font size=2 color=#000080 face="Arial">I'm trying to determine if this is 
good or bad. &nbsp;We can not test a large ftp because of the setup on the 
client.</font>
<br><font size=2 color=#000080 face="Arial">&nbsp;</font>
<br><font size=2 color=#000080 face="Arial">&nbsp;</font>
<br>
<br>
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