Hi David,

Sun hardware is really not my area of expertise, but I'm sure there are
others on amanda-users who can answer this.  If your Sun boxes will only
do 10 Mbps/half-duplex then just make sure your switch ports are set to
either auto/auto or 10/half and you'll be fine.

-Mitch


On Fri, 7 Feb 2003 David.Lee AT arvatousa DOT com wrote:

> Mitch.
> Here is the version of my Sun OS:
> "SunOS gitpocs02 5.7 Generic_106541-08 sun4u sparc SUNW,Ultra-5_10"
> The /dev/hme is "FEPS Ethernet Driver  v1.115"
> The host seems too old to support 100/full-duplex.
> Do you agree?
>
> Thanks!
>
> David
>
> -----Original Message-----
> From: Mitch Collinsworth [mailto:mitch AT ccmr.cornell DOT edu]
> Sent: Thursday, February 06, 2003 7:18 PM
> To: David.Lee AT arvatousa DOT com
> Cc: amanda-users AT amanda DOT org
> Subject: Re: speed problem
>
>
>
> On Thu, 6 Feb 2003 David.Lee AT arvatousa DOT com wrote:
>
> > My tape server is a Linux host (Redhat 7.3).
> > My clients are either Linux hosts or Sun Solaris hosts.
> > All client hosts are on the same domain.
> > When I run 'amdump' to backup Linux hosts, the speed is pretty good.
> > When I run 'amdump' to backup Sun Solaris hosts, the speed is extremely
> > slow.
> > It seems not a network or hardware issue.
>
> Seems?  You don't sound particularly sure on this point...  In my
> experience one thing that is a frequent cause of deadly slow network
> backups is a duplex mismatch between a backup client and the ethernet
> switch it connects to.  I've seen systems that the user had been happily
> using without complaint for weeks or months before asking for backups.
> When their backup went painfully slow I'd check their network settings
> and invariably find a duplex mismatch.
>
> Another cause of slowness can be doing client compression, especially
> "client best" on slow hardware.  How old/slow are your Solaris boxen?
>
> -Mitch
>