Veritas-bu

[Veritas-bu] Different throughputs for different drives

2001-08-06 23:00:01
Subject: [Veritas-bu] Different throughputs for different drives
From: richard_plourde AT hp DOT com (PLOURDE,RICHARD (HP-Canada,ex1))
Date: Mon, 6 Aug 2001 20:00:01 -0700
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Hi all,
 
I'm performing offline_split backups of SAP instances with the NetBackup SAP
client and BusinessCopy extensions. I use six drives to backup  a 457 Gb
database. Netbackup spreads the load equally (about 77Gb each) among the six
drives (HP LTO Ultrium 230). When the backup runs I get different
throughputs (from 11 to 30 Mb/s). So my backup is as fast as my slowest
session.
 
Why does this happen?
 
Regards,

  _____  


 <http://www.hp.com/>  

Richard Plourde
technical consultant
Hewlett-Packard (Canada) Ltd.

514.428.4641Phone
514.428.2190Fax

 <mailto:richard_plourde AT hp DOT com> richard_plourde AT hp DOT com 


  _____  

 

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<DIV><FONT face=3DArial size=3D2><SPAN class=3D669134702-07082001>Hi=20
all,</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D669134702-07082001></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D669134702-07082001>I'm =
performing=20
offline_split backups of SAP instances&nbsp;with the NetBackup =
SAP&nbsp;client=20
and BusinessCopy extensions. I use six drives to backup&nbsp; a 457 Gb =
database.=20
Netbackup spreads the load equally (about 77Gb each) among the six =
drives (HP=20
LTO Ultrium 230). When the backup runs I get&nbsp;different throughputs =
(from 11=20
to 30 Mb/s). So my backup is as fast as my slowest =
session.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D669134702-07082001></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D669134702-07082001>Why =
does this=20
happen?</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D669134702-07082001></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D669134702-07082001>Regards,</SPAN></FONT></DIV>
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      face=3D"Futura Bk" color=3D#000000 size=3D1>
      <P style=3D"MARGIN-TOP: 0px"><A href=3D"http://www.hp.com/";><IMG =
height=3D131=20
      src=3D"cid:669134702@07082001-31df" width=3D140 border=3D0></A> =
</P></FONT></TD>
    <TD vAlign=3Dtop width=3D250>
      <DIV><FONT face=3D"Futura Bk" color=3D#0a357e size=3D2><B>Richard =

      Plourde</B></FONT></DIV>
      <DIV><FONT face=3D"Futura Bk" size=3D1>technical =
consultant</FONT><BR><FONT=20
      face=3D"Futura Bk" size=3D1>Hewlett-Packard (Canada) =
Ltd.</FONT><BR><BR><FONT=20
      face=3D"Futura Bk" size=3D1>514.428.4641Phone</FONT><BR><FONT =
face=3D"Futura Bk"=20
      size=3D1>514.428.2190Fax</FONT><BR><!-- If you DO NOT want to =
share your cell phone, just delete the next line --><BR><FONT=20
      face=3D"Futura Bk" size=3D1><A =
href=3D"mailto:richard_plourde AT hp DOT com"><FONT=20
      face=3DArial color=3D#000000=20
      size=3D2>richard_plourde AT hp DOT com</FONT></A>&nbsp;</FONT><!-- If =
you DO NOT want or have an ecardfile, just delete the next three lines =
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