ArribaSIM is a fork of OpenSim developed by Freaky Tech. Freaky cleaned up a great many bugs and removed dead code, while staying compatible with OpenSim: an ArribaSIM can be docked into an ordinary OpenSim-based grid.
Because of that bug fixing, ArribaSIM is more stable and faster than vanilla OpenSim.
In 2022, Akira Sonoda developed ArribaSIM further, on the basis of the current OpenSim 0.9.
Surabaya is a Java-based cache for textures and inventory structure. It supplies the viewer with textures and inventory directly and quickly, to keep lag down and speed up the rezzing of regions.
It is a grid-wide service and can be added to a simulator through an entry in the simulator's configuration files.
Thanks to changes in its code, ArribaSIM 0.9 performs very well even without the Surabaya interface. It is therefore operated without Surabaya.
Dereos was founded by Akira Sonoda, Freaky Tech and a number of other users as a group of German-speaking regions within OSGrid, with the aim of running simulators as stably and efficiently as possible.
When the great crash hit OSGrid, the community moved to the Metropolis grid. After a while it became difficult to go on providing the reliability we were aiming for as a group of regions inside the OpenSim-based Metropolis grid, and that led to a meeting at the pool on Lys Sandbox:
On Sunday, 25 January 2015, all users of the Dereos group who were present decided to open a grid of their own. With the help of Freaky Tech, the developer of ArribaSIM, Akira put the project into practice in next to no time.
At the end of 2022, Akira Sonoda modernised the ArribaSIM developed by Freaky Tech, on the basis of the current simulator version 0.9.
The grid is named Dereos in memory of that group of regions in the OpenSim grid, and of the idea of operating simulators stably and efficiently.
Because of the many international visitors who arrive over HyperGrid, and the friendships that grew out of them, the subtitle “German-speaking regions” has been dropped. What used to be a shorthand has simply become a name that stands for stability and performance — for everyone who visits us or lives here, whatever language they speak.
And here we are… ArribaSIM & Surabaya! A new hope.
Dereos is not a grid where you can freely create an account, and freely docking simulators is not possible either.
The grid and the website are a purely non-commercial hobby project, maintained and looked after on a voluntary basis.
Note: If you are interested, please get in touch with Akira Sonoda.
The login URI, or grid URL, for the viewer is http://dereos.org/.
