Where are strategies stored?

[ErikY]

It seems to me that the strategies are not stored in the workspace XML, can anyone tell me what XML the strategies are actually stored in?

Its incredibly frustrating when a workspace crashes and I lose all my strategies and then have to rebuild them

[NinjaTrader_ChelseaB]

Hello ErikY,

The instances (not the code) of strategies are stored in both the database and the workspace. The information about the strategy is saved in the database, and the ID for the instance is stored in the workspace. When the workspace opens, it fetches information to re-initialize the instance from the database based on that ID.

As long as the workspace is saved and the workspace and database are not removed or reset, and the implementation of the strategy code has not changed, I would expect all instances to restore when the workspace is open.

[ErikY]

Hello ErikY,

The instances (not the code) of strategies are stored in both the database and the workspace. The information about the strategy is saved in the database, and the ID for the instance is stored in the workspace. When the workspace opens, it fetches information to re-initialize the instance from the database based on that ID.

As long as the workspace is saved and the workspace and database are not removed or reset, and the implementation of the strategy code has not changed, I would expect all instances to restore when the workspace is open.

ok, so whats happening is Ninja is hanging for some reason, and my workspace crashes, ninja has to be hard exited, and then I lose all 70 of my strategies and have to rebuild them. So it sounds like with what you described, there is no way to get them back without rebuilding them? The workspace itself I cna make a copy of, but no way to do with with strategies? If so, thst really unfortunate

[NinjaTrader_ChelseaB]

Hello ErikY,

If NinjaTrader closes without saving the workspace, then the strategies and other windows will not be saved in the workspace or restored.

After rebuilding the workspace immediately manually save it before enabling any strategies.

Then if NinjaTrader freezes and you have to close it, the workspace is already saved and will restore the way it was last saved and you won't have to rebuild it.


The hang would likely be caused by a running script or amount of running scripts.
If a specific script is causing the hang, I would recommend investigating what code in that script is causing that behavior.

If the amount of scripts is causing the hang, I would recommend reducing the amount of running scripts.

This thread discusses performance.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/platform-technical-support-aa/1055200-nt8-jump-in-memory-usage?p=1055235#post1055235

[ErikY]

So, I saved after enabling them, and that did not seem to work, you specifically have to save the workspace before enabling them? Why is that?

[NinjaTrader_ChelseaB]

Hello ErikY,

The scripts being enabled is going to take up resource performance and could cause the hang before you can save the workspace..
I'm suggesting you save the workspace before NinjaTrader hangs.

I am not able to reproduce. Below is a link to a video.
https://drive.google.com/file/d/18Ot...w?usp=drivesdk


Your strategy might also not be written correctly to save in a workspace. Do you see errors on the Log tab of the Control Center when saving the workspace?