Often see history curve of industrial control software, even if a large amount of data also draw fast, excuse me what method did, please directly!

CodePudding user response:

That was sampled data,

If like you said, a lot of data, assuming that Scott said map, adjusted the history both of this car for two months, the somebody else Scott is a package of 1 SEC, 2 months of data also shall not be more than 10 G, do you think how long it would take 10 G data hard to plot are not painted, pure data loading back is not a short time

So now to industrial control class, do not use this universal database MSSQL again, he usually choose temporal database, temporal database query is automatically sampling

CodePudding user response:

For example, we can choose the Prometheus (he built a temporal database)
https://www.cnblogs.com/fat-girl-spring/p/13720642.html

He is in fact the your request of "interval vector (Range vector) : a set of temporal sequence, each sequence contains multiple sampling over a period of time value"

That when we will be able to query query, give me a week sampling data (5000 sampling points), then draw the 5000 point there would be no problem to you,

CodePudding user response:

reference 1st floor wanghui0380 response:

that is sampled data,

If like you said, a lot of data, assuming that Scott said map, adjusted the history both of this car for two months, the somebody else Scott is a package of 1 SEC, 2 months of data also shall not be more than 10 G, do you think how long it would take 10 G data hard to plot are not painted, pure data loading back is not a short time

So now to industrial control class, do not use this universal database MSSQL again, he usually choose temporal database, temporal database query is automatically sampling

According to your meaning, curve data is treated with sampling? Not all the data?

CodePudding user response:

Tens of thousands of points history curve plotting, there should be no card, use GDI drawing