Re: slow network
Re: slow network
- Subject: Re: slow network
- From: Nick Phillips <email@hidden>
- Date: Fri, 17 Feb 2006 14:42:59 +1300
On 17/02/2006, at 11:14 AM, Bill Campbell wrote:
Sorry if this is a stupid question but I am new to x11.
I am running a small media suite of 50 imac g5's and an xserve, (i
asked a question a few weeks ago and fixed my problems with the
advice given)
and have started experimenting with x11. I have put it on all
machines and have managed to get GIMP installed as the students need
an image manipulation program. . All logged in users can open GIMP
fine, x11 boots nicely etc. problem is that GIMP runs 3 times slower
on network clients than when I run it on my laptop or any other
computer locally. Is this speed decrease using x11 apps over a
gigabit network to be expected? each g5 has a gig of ram.
Is it a memory cache issue? Is there a workaround? Thanks for any
help or tips or pointers!
What type of network, 10/100, megabit...?
Do you have reasonably smart switches, or ancient 10baseT hubs?
Gigabit, he says.
Is the software on a server or on the clients?
If you have NFS mounted servers, it's probably a Good Idea(tm) to
set the options so that they use tcp, not udp for the NFS
connections.
It's probably also a good idea to make sure that GIMP's tile cache is
large enough, and that its swap file is on the local machine, not the
network. It usually asks for a location for this during the install
on Linux, but I don't recall whether it does on OS X.
Have a look at /Applications/Gimp.app/Contents/Resources/etc/gimp/2.0/
gimprc -- the section where the swap file is set says:
# Sets the swap file location. The gimp uses a tile based memory
allocation
# scheme. The swap file is used to quickly and easily swap tiles out
to disk
# and back in. Be aware that the swap file can easily get very large
if the
# GIMP is used with large images. Also, things can get horribly slow
if the
# swap file is created on a directory that is mounted over NFS. For
these
# reasons, it may be desirable to put your swap file in "/tmp". This
is a
# single folder.
#
# (swap-path "${gimp_dir}")
So you probably want to set this explicitly to a path on the local
machine. Note that settings in that file can be overridden by those
in ~/.gimp-2.2/gimprc
Cheers,
Nick
--
Nick Phillips / +64 3 479 4195 / email@hidden
# these statements are my own, not those of the University of Otago
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