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Hi,
=20
we run backups to an LTO library, single tape drive, so expected to be =
able to render at least 10 Mbyte per sec of data sent to the tape. What =
we see in the job-details is an max throughput of about 2.5 Mbyte per =
sec, regardless of the client that is sending its data to the backup =
server.
=20
The network topology is such that many clients are separated from the =
backup server by a firewall, which could be a cause for the slower =
network throughput.
=20
But when the backup is being taken of a fileserver that sits on the same =
network segment as the backup server (so without intermediate firewall), =
we get still the same throughput of 2.5MBps.
=20
I do not see any collisions on the network interface of the backup =
server, so I do not suspect a saturated network link.
=20
How can we diagnose the place where the throughput is being slowed down =
?=20
All boxes (server and client) are Solaris-9 hosts, backup server is =
SUN-SF280R, link to L25 robot is Ultra-SCSI (supposedly to give me max =
of 80 MBps, no?)
=20
TIA
=20
Rob
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<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004>Hi,</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D156382805-30062004>we run =
backups to an=20
LTO library, single tape drive, so expected to be able to render at =
least 10=20
Mbyte per sec of data sent to the tape. What we see in the job-details =
is an max=20
throughput of about 2.5 Mbyte per sec, regardless of the client that is =
sending=20
its data to the backup server.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D156382805-30062004>The =
network topology=20
is such that many clients are separated from the backup server by a =
firewall,=20
which could be a cause for the slower network =
throughput.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D156382805-30062004>But =
when the backup=20
is being taken of a fileserver that sits on the same network segment as =
the=20
backup server (so without intermediate firewall), we get still the same=20
throughput of 2.5MBps.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D156382805-30062004>I do =
not see any=20
collisions on the network interface of the backup server, so I do not =
suspect a=20
saturated network link.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D156382805-30062004>How =
can we diagnose=20
the place where the throughput is being slowed down ? =
</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D156382805-30062004>All =
boxes (server=20
and client) are Solaris-9 hosts, backup server is SUN-SF280R, link to =
L25 robot=20
is Ultra-SCSI (supposedly to give me max of 80 MBps, =
no?)</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004>TIA</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D156382805-30062004>Rob</SPAN></FONT></DIV></BODY></HTML>
=00
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