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I'm attemping to restore several Exchange storage groups to a dedicated
recovery server.
=20
The backup server and the exchange recovery server both have GigE, and
are on the same VLAN and switch.
The restore starts off screaming, averaging around 60,000KB/s and
peaking well into the 80's, then after about 100 gigs have been
restored, it slows to around 7,000KB/s.
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It makes no difference which storage group I'm restoring, or in what
order....
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For example, if I start 4 separate jobs for 4 storage groups, the first
100 megs of each SG is fast, then slows to 7MB/s
If I start one job with all 4 storage groups, the first 100G of the
first SG is fast, then the remainder of that SG, and all of the other 3
SGs are slow.
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I'm currently backing up the 4 SGs using multistreaming, one stream per
SG, and mulltiplexing 2 streams per tape.
(4 SGs, 4 streams, 2 tape drives) and getting sustained speeds over
20,000KB/s PER STREAM during the backup.
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This is getting frustrating, as I'm backing up 660 gigs of exchange data
in under three hours, but the last full restore ended up taking 26
hours!
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Any ideas?
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Paul
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<DIV><FONT face=3DTahoma size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>I'm =
attemping to=20
restore several Exchange storage groups to a dedicated recovery=20
server.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D140015113-08122004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>The =
backup server=20
and the exchange recovery server both have GigE, and are on the same =
VLAN and=20
switch.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>The =
restore starts=20
off screaming, averaging around 60,000KB/s and peaking well into the =
80's, then=20
after about 100 gigs have been restored, it slows to around=20
7,000KB/s.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D140015113-08122004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>It =
makes no=20
difference which storage group I'm restoring, or in what=20
order....</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D140015113-08122004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>For =
example, if I=20
start 4 separate jobs for 4 storage groups, the first 100 megs of each =
SG is=20
fast, then slows to 7MB/s</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>If I =
start one job=20
with all 4 storage groups, the first 100G of the first SG is fast, then =
the=20
remainder of that SG, and all of the other 3 SGs are =
slow.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D140015113-08122004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>I'm =
currently=20
backing up the 4 SGs using multistreaming, one stream per SG, and =
mulltiplexing=20
2 streams per tape.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>(4 =
SGs, 4 streams, 2=20
tape drives) and getting sustained speeds over 20,000KB/s PER STREAM =
during the=20
backup.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D140015113-08122004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>This =
is getting=20
frustrating, as I'm backing up 660 gigs of exchange data in under three =
hours,=20
but the last full restore ended up taking 26 hours!</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D140015113-08122004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D140015113-08122004>Any=20
ideas?</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D140015113-08122004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D140015113-08122004>Paul</SPAN></FONT></DIV></BODY></HTML>
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