Hi
I thought some of you might be interested to hear what resolved this issue.
Basically, the issue was that we were getting 3-4mBps backup rate on a Windows
2003 client which had been backing up fine when on Windows2000 (same hardware).
The card in the Windows 2003 client is an Intel Pro 1000 MT dual port adapter.
If we set the card to 100mbps, we got a throughput on backups of around 10-12
mBps.
By unchecking the various 'Offload' parameters in the Advanced settings on the
adapter, and re-setting to gigabit, we now have throughput of 30+ mBps.
As it's a fairly beefy box we're hoping it wont have an adverse effect on day
to day use (by putting the load back on the client CPU's as oppsed to the card).
We're a bit concerned that we've just 'masked' the real issue (ie why does this
card behave so poorly under Windows2003 when it worked fine under Windows2000),
but at least we can get our backups done in a reasonable time now! (We did try
an older driver, but that made no difference).
As a test, I also made this change on a much less powerful Windows2000 server
(HP) with an HP dual port card. Performance did increase slightly on this box
too.
Anyone out there doing a similar thing with their gigabit cards?
Cheeers... Allan.
>>> an AT CEH.AC DOT UK 22/11/05 08:36 >>>
We've checked the NIC settings and the switch port settings (also tried
different switch port).
Did some more tests yesterday...
FTP of a 1gByte file from the Windows client to the Networker Server took 58
seconds.
Initiating a backup of that file from the Windows client - 5 mins 40 seconds
(lets be kind and allow 40 seconds for the tape to position ;-)
Again, it ties in with what I've seen on the other backups - throughput on this
backup hovered around 3-4mB sec.
We were convinced it must be a hardware issue, but we've swapped almost
everything we can (cables, ports etc). Will try another NIC in the Windows
box, but I'm not convinced. As I say, FTP is fine.
Any other ideas?
Allan.
>>> Peter.Orton AT KPMG.CO DOT UK 21/11/05 13:49 >>>
It sounds like the problem here is as Ed says, most likely that the NIC
on the Windows client is set to Half Duplex and needs to be set to Full
Duplex.
Regards
Pete orton
-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On Behalf Of Coty, Edward
Sent: 21 November 2005 13:41
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Windows 2003 - Poor performance
Check the nic cards settings and make sure you have no nic card and
switch
port mismatch.
Ed Coty
Open Systems Storage Engineering, LCNA
973-533-2098
-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On
Behalf Of Allan Nelson
Sent: Monday, November 21, 2005 4:00 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Windows 2003 - Poor performance
Hi
Wonder if anyone else has any problems with slow backups when backing up
Windows 2003 servers?
Server: Solaris 9 - Networker 7.2.1 server - gigabit card
Client: Windows 2003 - Networker 7.2.1 client - gigabit card
Jukebox: Quantum ML1800 with 2 x SDLT600 drives.
We've just recently upgraded this Windows box to Windows 2003 (from
Windows2000), and found the performance on backups has gone through the
floor.
For example this weeks full backup ...
W2003server: D:\ level=full, 294 GB 18:25:19
66556 files
( roughly 16GB hr)
It's not contention of any kind, as the biggest filesystem on a Netware
client (300 gb - 900,000 files) finishes in 10 hours. Even on this, I
get
around 24GB hr backup speed, and there are many more small files than on
the
Windows2003 server.
For the next 8 hours this is the only saveset still running, and it
seems to
be backing up at around 2-3mB sec.
We've tried FTP's etc and they seem normal (ie nice and fast).
Data is on a RAID5 array directly attached to the server (9 * 146gb
drives).
When this server was on Windows 2000 and Networker 7.2.1 it backed up
MUCH
faster - OK, there are around 20,000 fewer files (but more data) but I
wouldn't expect that to make over 10 hours difference in backup time.
W2000server: D:\ level=full, 300 GB 08:08:02
40139 files
(roughly 37GB hr)
Unfortunately? this is the only Windows2003 server I have so have
nothing to
compare it with.
Any ideas for resolving this would be greatly appreciated.
Cheeers... Allan.
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