Re: Speed question
From: Jorgen Moquist (jorgen.moquist_at_n.o.s.p.a.m.mailbox.swipnet.se)
Date: 01/18/05
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Date: Tue, 18 Jan 2005 00:09:31 +0100
gpmartinson wrote:
> I have a series of 40 sunray1 terminals that connect to a very old
> underpowered solaris server. I have detached the xsessions from each
> of these clients so that they use a newer linux desktop for desktop and
> applications. My question is about the nature of the sunray software.
> I would like to speed up the performance of the sunrays. I could:
>
> A. Move all of the services off the older server and use the linux
> machine which increases the performance needs of the linux machine and
> cuts out the solaris box. This may be faster, but I am not certain
> about the speed gains and the amount of overhead generated by sunray
> services.
>
i read some early docs on sunray terminals, that they use about 30mhz cpu
of the server. that would be some max 1200mhz on the sun.
if all of them are active.
> B. Maintain the current configuration because the existing older
> solaris server handles part of the load and the speed reduction is due
> to the slow performance of running 40 linux desktops on one server over
> a private stiched 100BT network.
>
you need to check for the bottleneck, memory, cpu or network.
vmstat for memory & cpu
netstat for network
iostat for disks
one way to do this is if you are using Solaris8, is reading
/etc/rc2.d/S21perf
> C. Scrap the sunrays at least partially and buy low-cost macs or PCs
> reducing the total strain on the network.
> or
> D. Buy a better server for the sunrays on the Linux side of things to
> replace the exising set up.
>
> I was an early adopter of the sunray model in a school(9-12) and am
> really unhappy about performance and spend a significant portion of my
> day apologizing for poor performance. I don't have a ton of money to
> buy more hardware, but I feel an urgent need to address a serious need.
> Any suggestions?
>
/Jörgen
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