Interesting figures as I have never seen these before.
How did you arrive at 5-800K?? Is this supposing a 10
or 100 megabit card? Can someone elaborate. Thanks.
--- Dave High <Dave.High AT veritas DOT com> wrote:
> Hi Phil,
>
> Typically a half duplex NIC runs at between 500 -
> 800Kb per second depending
> on your machine and network. At 500Kbps, you are
> looking at about 1.8 Gig
> per hour. Sometimes Windows machines at half duplex
> are even slower than 500
> Kbps by the way. I have seen rates of 200 - 300
> Kbps..
>
> It is highly recommended that the NIC be forced to
> 100Mbit both at the card
> level, and at the switch level and never, ever use
> auto negotiate. You would
> be surprised how many times I have gone onsite to
> troubleshoot slow backup
> rates only to have the network guy assure me that
> Auto Negotiate works just
> fine, then I have to prove to them that it is stuck
> in Half Duplex... this
> usually takes about two days to convince them to
> double check and test, and
> it usually clears up the problem.
>
> Anyway, get the card set to 100Mbit full and retry
> the restore. You should
> be able to do between 2 - 4 Megs per second. Use
> Perfmon to look at NIC
> rates while it is running, or use the Unix Activity
> Monitor (Job Monitor) to
> see how fast the backup is running. You should get
> nearly the same speed on
> restores (depending on Multiplexing settings) as you
> do on backups.
>
> Other than that, the restore information from NBU is
> really limited. This
> has been a pet peeve of mine for the longest time.
> NBU 4.5 addresses this
> issue somewhat, but the information is still not as
> full as the backup
> information.
>
> d.
>
> __________
> dave high
> VERITAS Enterprise Consulting
> 702.683.7733
>
> Unix IS user friendly, it's just VERY picky about
> who it chooses as friends
>
>
> > -----Original Message-----
> > From: Weber, Philip [mailto:Philip.Weber AT egg DOT com]
> > Sent: Thursday, April 11, 2002 5:34 AM
> > To: 'veritas-bu AT mailman.eng.auburn DOT edu'
> > Subject: [Veritas-bu] Slow Performance of Restore
> >
> > Hi,
> >
> > I am running a restore of an NT client, approx 110
> Gb expected; over the
> > last 8 hours it has done 10 Gb which seems a tad
> slow. Can anyone offer
> > any
> > hints on how I might troubleshoot this e.g. to
> check throughput, see how
> > much is remaining, or improve performance in the
> future? I thought I had
> > seen this topic discussed recently on the list but
> can't find it on the
> > archives.
> >
> > ...
> >
> > Since I started writing this email I've discovered
> that the NT client has
> > it's 100 MB interface set to Half-Duplex which I
> guess is what is causing
> > the problem. My other questions stand, though, is
> there any source of
> > information on restore progress?
> >
> > thanks, Phil
> >
> > PS Solaris 2.6 master & media servers with 1000 MB
> interfaces, L700 with
> > DLT
> > Drives.
> >
> > Phil Weber
> > IT Infrastructure Unix Systems Engineer
> >
> > Phone: 01384 26 4136
> > Mobile: n/a
> >
> >
> >
> >
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