Well, the raw wire speed for the network connection on each server is 12.5
Megabytes per second. Seeing 25% of that, after your protocol and
application overhead, isn't great, but it isn't completely terrible.
I only get about 2 Mb/sec over 100baseT using Veritas's BackupExec with
Agents. Compression is turned on, too. The 'sending' servers are old and
slow, so that might be the problem on my network. But our backup window is
large, so I haven't really bothered with tuning it.
See what kind of raw transfer rate you get by timing a straight
server-to-server file copy. That should give you an indication of the peak
rates you can achieve.
Also, check for file fragementation on the source servers. I went from 1.5
to 2.2 Mbytes/sec backups after defragging one of my 'source' servers.
-ryan-
> -----Original Message-----
> From: Bendall, Paul (KBPB) [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, March 07, 2002 5:33 AM
> To: NT 2000 Discussions
> Subject: Backup Performance fine tuning
>
>
> Hi,
>
> I was wondering if any one knows of a whitepaper that
> discusses fine tuning servers and NIC's to maximise
> throughput for backups. I have a farm of servers running
> Windows NT and Windows 2000 that are each dual NIC'ed one for
> production one for backup. The backup NIC's form a local LAN
> unrouted and terminate on a 1 GB NIC connected to s Gigabit
> port on the switch. However the performance off the servers
> is not that great about 3MB/Sec. The backup software is
> Veritas Netbackup latest version and patches.
>
> TIA
>
> Paul
>
>
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