[Opensim-dev] load sharing.....

[Charles Krinke]

Dear Johan:

I also don't want to perturb any plans, but I can imagine some use cases where certain regions are more essential to, say, a grid, then other regions. 

We have the notion of a default region for our UserServer and it works quite well. But, if the default region goes down, then the viability of the grid itself is questioned quickly.

So, I would tend to vote that some method to ensure the default region on a grid can have its load balanced or revert to a backup, that this might help us.

Charles


----- Original Message ----
From: バンション ヨハン <johan at 3di.jp>
To: opensim-dev at lists.berlios.de
Sent: Monday, July 14, 2008 8:00:15 PM
Subject: Re: [Opensim-dev] load sharing.....

Hi Terry,

As Adam suggested, the 3Di load balancing code has much of the functionality you request. We can already clone a region and specify for each copy how much it should update. We haven't implemented the scenario you describe (an active region with a standby region that you could switch do), but it is just a matter of extending the GUI and making small extensions to the current code. 

So it is no technical problem, but is it worth doing? Who do you think would be interested in this functionality? I could do this, or direct someone to do it, if it is useful, but if it ends up not being used I'd rather use my time on other things.

/Johan

----- Original Message -----
From: "Adam Frisby" <adam at deepthink.com.au>
To: terry at usfastweb.com, opensim-dev at lists.berlios.de
Sent: Monday, July 14, 2008 3:14:20 PM (GMT+0900) Asia/Tokyo
Subject: Re: [Opensim-dev] load sharing.....

I know the 3Di load balancing code could potentially lend itself to this sort of application.

The best method would be to somehow serialise the scene regularly and send that to a home sim, then write an application plugin to catch exceptions and if one occurs, manually send a "force teleport" (also known as a border crossing packet) to jump the user onto the standby.

I don't actually think that would be insanely difficult to do.

Adam

> -----Original Message-----
> From: opensim-dev-bounces at lists.berlios.de [mailto:opensim-dev-
> bounces at lists.berlios.de] On Behalf Of Terry F.
> Sent: Sunday, 13 July 2008 9:59 PM
> To: opensim-dev at lists.berlios.de
> Subject: [Opensim-dev] load sharing.....
>
> Hi all,
>
> This question is being directed towards those of you with the
> load-balancing knowledge, but others may know as well.
> Hope it doesn't come across as a silly question.
>
> Would/could the load-balancing abilities be able to be configured in
> such a way as to act like a "Mirror" and take over the region serving
> responsibilities in the event of a simulator crash until the server was
> able to be restarted?  Or... would the "Crash" event simply cause a
> crash of all "Mirrored" instances as well?
>
> Just a thought... didn't know if it were a possibility or just wishful
> thinking.
>
> Thank-you for your time,
> -Terry
>
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