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Hello Hampus,=20
Are you using multiple streams from the client node when doing a backup?
Are there other non-backup tasks running on the client when doing =
backups?
Are you using tape multiplexing? If so at what level?
What is the nature of the files being restored?=20
We find that windows system state backups and restores are slower then =
non-system state.=20
Many small files, or files with many special attributes such as acl's =
will slow things down. So if your client had a few large files the speed =
would be faster.=20
Of course you newer hardware might have faster memory, faster disks, =
faster networking.=20
=20
We are using a factor of 8 on tape multiplexing, which is too many for =
some of our clients, and two few for others, but seems to work out on =
average. On backup any single stream does not run that fast If all =
clients were equal, we would be talking about a little over 4KB per =
client.=20
During a restore we are seeing i/o rates against the tape at the full =
rated speed of the tape drives(35KB).
len=20
----- Original Message -----=20
From: Hampus Lind=20
To: veritas-bu AT mailman.eng.auburn DOT edu=20
Sent: Saturday, April 22, 2006 8:27 AM
Subject: [Veritas-bu] Restore faster than backup...
Hi all,
I have seen some strange things here during a netware backup and =
restore.=20
We have replaced the hw for a netware server and before we did that I =
did a full backup which took 8h and 30 minutes. Later when the server =
was replaced I did a full restore that took 58 minutes.
I was very happy about this restore time, I thought now we also we =
have improved the backup time. But when I run a backup it still takes =
forever..
I always thought that a restore took longer time then a backup.. =
Anyone have any idea about this scenario?
Thanks and regards,=20
Hampus Lind
Rikspolisstyrelsen
National Police Board
Tel dir: +46 (0)8 - 401 99 43
Tel mob: +46 (0)70 - 217 92 66
E-mail: hampus.lind AT rps.police DOT se
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<DIV><FONT face=3DArial size=3D2>Hello Hampus, </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Are you using multiple streams from the =
client node=20
when doing a backup?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Are there other non-backup tasks =
running on the=20
client when doing backups?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Are you using tape multiplexing? If so =
at what=20
level?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>What is the nature of the files being =
restored?=20
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>We find that windows system state =
backups and=20
restores are slower then non-system state. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Many small files, or files with many =
special=20
attributes such as acl's will slow things down. So if your client had a =
few=20
large files the speed would be faster. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Of course you newer hardware might have =
faster=20
memory, faster disks, faster networking. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2> </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>We are using a factor of 8 on tape =
multiplexing,=20
which is too many for some of our clients, and two few for others, but =
seems to=20
work out on average. On backup any single stream does not run that fast =
If all=20
clients were equal, we would be talking about a little over 4KB per =
client.=20
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>During a restore we are seeing =
i/o rates=20
against the tape at the full rated speed of the tape =
drives(35KB).</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>len</FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dhampus.lind AT rps.police DOT se=20
href=3D"mailto:hampus.lind AT rps.police DOT se">Hampus Lind</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
title=3Dveritas-bu AT mailman.eng.auburn DOT edu=20
=
href=3D"mailto:veritas-bu AT mailman.eng.auburn DOT edu">veritas-bu AT mailman
DOT eng.=
auburn.edu</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, April 22, 2006 =
8:27=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [Veritas-bu] Restore =
faster than=20
backup...</DIV>
<DIV><BR></DIV>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hi =
all,</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I have seen some strange =
things=20
here during a netware backup and restore=85 </SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">We have replaced the hw =
for a=20
netware server and before we did that I did a full backup which took =
8h and 30=20
minutes. Later when the server was replaced I did a full restore that =
took 58=20
minutes=85</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I was very happy about =
this=20
restore time, I thought now we also we have improved the backup time. =
But when=20
I run a backup it still takes forever..</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I always thought that a =
restore=20
took longer time then a backup.. Anyone have any idea about this=20
scenario?</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thanks and regards,=20
</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Hampus=20
Lind<BR>Rikspolisstyrelsen<BR>National Police Board<BR>Tel dir: +46 =
(0)8 - 401=20
99 43<BR>Tel mob: +46 (0)70 - 217 92 66<BR>E-mail: <A=20
=
href=3D"mailto:hampus.lind AT rps.police DOT se">hampus.lind AT rps.police DOT
se</A></=
SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"></SPAN></FONT> </P></DIV></BLOCKQUOTE></BODY></HTML>
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