Tuesday, September 18, 2007

Opensim: "sandbox" vs "grid mode" => "standalone" vs "distributed"

This week is going to be RL-busy, so besides the auto-upgrading sim for testing the latest release, I won't contribute too much.

However, with the "official" release 0.4 approaching,
I wanted to write about a common misunderstanding when it comes to talking about "standalone" or "sandbox" mode vs. "grid mode" - which should really be now called "distributed" mode.

misconception#1: You can have only one 256x256 sim in standalone mode.

No, technically you can have as many as you want, assuming you have enough memory. I tested with 5x5, but it runs quite a bit slow. ODE physics may have issues (or so I heard) with multiregion setup - but you *can* run many regions within the same opensim in standalone mode. How to do it ?
Very simple. You will need to create the new files in the bin/Regions directory, one file per each new region. Things to watch out for: ensure the database names there, the port numbers, and coordinates are unique - otherwise you will get an unfriendly barf when trying to launch the opensim :) I've made once a multiregion helper script in ruby to automate the creation of the region XML files.

misconception#2: To allow anyone else besides me to connect, I need to run in grid mode.

No, as soon as your IP is reachable from the your friends' computers, and the necessary ports are open, and you create the accounts for them ("create user Firstname Lastname password 1000 1000") - they can connect without any problem.

indeed using anything other than "test" for the password puts you in a very awkward situation of needing to know your friends' password to create the account (and there's no means to change it at the moment - which, I agree, is altogether a bad-ass thing from the "puristic security" perspective). However, as we do not trade gold of anything at this time in opensims, I would not consider this to be a showstopper.


Caroline said...

Hey there,

This is Caroline from SocialRank.

I am trying to get in touch with you but couldn't find your email address.

We're launching a new Web 2.0 site dedicated to Second Life and we have started indexing your blog posts as part of our content filter.

I'd like to send you an invite to a beta preview. Can you get back to me with your email address.

Mine is caroline@sweetsecondlife.com

Kind regards,



Sean Dague said...

Great post explaining the current state of things. Keep up all the great blogging on OpenSim! :)

Veyron Supercharge said...

Dalien, I'm curious about doing more on this opensim of yours, but I'm a bit confused with a few details.

Perhaps a Google Group or something would be useful to put all the information together and have a place to have two way discussions about it would be useful?



Dalien said...

Veyron: Occam's principle. :) Take a look at opensimulator.org - there are maillists - feel free to join, and also there's IRC :)

Veyron Supercharge said...

Yes, but there's no link from here. There's nothing obvious. This is supposed to be hyper textual, and all that jazz. What, I am supposed to think of these things on my own?


Dalien said...

the link is on the right side, under "quick links" :-)

catch me on googletalk (dalienta / gmail) if you get lost.