very slow login times

[rmcdaniel at indata.us]

Here's the scoop this morning.  I have run all updates on the server and
rebuilt the client /opt/ltsp/i386 to make sure that I had all current
updates applied.  I am still seeing excessive bandwidth used on the
switch with just 1 thin client attached and booting off of the server. 
To eliminate any network suspicion, I have a regular pc with XP running
off of the same switch in the lab.  When I access a youtube video with
the thin client, I max my switch port at 100% utilization with 100%
unicast packets.  When I access the same youtube video with the pc, the
switch utilization is very low 2%.  It seems like some great
inefficiencies in the networking protocols on the thin clients.  I can
load K12LTSP centos 5 and compare the results.  The only problem with
that is that there isn't any sound in flash...


Ron McDaniel
rmcdaniel at indata.us



-------- Original Message --------
Subject: Re: very slow login times
From: Warren Togami <wtogami at redhat.com>
Date: Wed, November 05, 2008 5:19 pm
To: Development discussion of K12Linux <k12linux-devel-list at redhat.com>

rmcdaniel at indata.us wrote:
> This is interesting. I am using a HP Proliant server with Dual Quad
> Core cpu's, 4 GB memory, and about 210GB of storage. I am also seeing
> very slow bootup and login times. I am suspecting that it has something
> to do with my network. When I run the resource monitor on the server,
> nothing looks like it is getting close to maxing out. I am running the
> 32 bit version of the OS and my clients are HP T5530 with 128 MB of mem.
> Tomorrow I am going to look at my network and see if I have any
> problems.
> 
> 
> Ron McDaniel
> rmcdaniel at indata.us
> 

Have you tried to plug a thin client directly into the 1GB ethernet 
interface on the server instead of going through switches? I've often 
seen bad switches or cables cause slow bootup and slow login.

Warren

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