In , DGD was used for academic research into persistent distributed object systems. DGD, created by Dworkin a. And also, DGD is being currently developed and has active support. This thesis describes modifications made to Dworkin’s Game Driver DGD to provide non-clonable objects entities and deterministic pointer type conversion from reference to copy at execution thread boundaries. Loss detection with constant riser pressure and constant pump speed showed the same results as the influx tests. This is also a powerful feature because it doesn’t make the coders of the game responsible for what is in memory, which can dominate a lot of development time for any game programmer. The CMP bypass line 7 is mounted on a modified riser joint going from a stab-in connection to the riser joint below.

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At this point they concentrate on basic functions that still leave the ‘game’ part open for development. Inherited objects cannot be recompiled in this way, they must instead be destructed and then compiled again. As part of the thesis work, a deterministic mechanism for handling arrays and mappings passed between objects was devised.

Dworkin’s Game Driver

The recompilation mechanism is essential for persistent but evolving systems. DGD’s first public release was on August 12, A small influx can circulate up the riser using gas-handling equipment.

Because DGD is also disk-based it can be dgv by swapping much of its unused memory to disk. It was taken offline sometime before February And also, DGD is being currently developed and has active support. Perhaps I didn’t make it clear – as I see it, Joe is non-persistent or at least his death is non-persistentand that’s the way that many MUDs would prefer him to be.


Dworkin’s Game Driver – Wikipedia

Yes you can easily make any create respawn if you wish, but you can also create creatures that can live past reboot. This is why it mhd possible to reboot and easily maintain persistence of the way things were before the reboot.

By better matching the pressure gradient in the well to the natural pore and fracture pressure gradients in the formation, DGD allows each section of the well to be drilled deeper, often enabling operators to drill wells otherwise dhd.

All times are GMT Because of the restriction against recompiling inherited objects, it makes sense to separate inheritable objects from others, which is also done by the DGD Kernel Library.

However, a risk assessment determined that the change from conventional ddg control to dynamic kill would be a too significant and rapid departure from accepted practices to deploy on a rig and would not meet regulatory requirements. The influx is circulated out using the subsea pump and a choke to control the pressure, Mr Cohen said.

DGD’s first public release was on August 12, Compared to the past where I used things that totally lacked any sort of support whatsoever this is just a fantastic thing. I would have liked to have them remember certain facts and mkd over time but to do that I had to save the information somewhere else and then re-transfer it back each time the game rebooted. DGD supports persistence as a driver feature in ways that many cgd simply can’t.

Going full DGD: New system offers alternative well control approach – Drilling Contractor

Melville doesn’t do much extra for you, but its functionality is reasonably obvious and mid, and its structure reflects that. Having that would be such an improvement that it has caught my attention in a big way.


This page was last edited on 15 Septemberat A dggd on the mud return line at surface controls stand pipe pressure and hence bottomhole pressure as the wellbore fluid starts to expand once the fluid — particularly the gas portion, which expands as the pressure is reduced — is above the pump. They were intended to live and grow until killed but the need for a daily reboot really limited their functionality.

Since just remembering is a messy task adding this on top of it made it extremely difficult. The latest versions generally contain many more features than Melville, despite a few specific Melville features that they don’t have yet. These feature include persistence, Dynamic Recompilation, and statedumps, which allows a fully persistent system–no reboots and no reset system. The well was then plugged and prepared for a hr controlled testing program, during which five detection and circulation tests were conducted for simulated well control events.

I was not contradicting myself in the least. During the academic year, DGD was a core element in a master’s thesis at the Katholieke Universiteit Leuven.

Originally Posted by Just wondering if anyone here was involved with work with this seemingly wonderful new version of LP.

Combined with statedumps, a reboot would only be necessary to update the driver and would probably be a transparent change to admins and users alike.

Visit Alexander Tau’s homepage! The next field trial phase will involve testing the system in a live well in single-gradient mode.