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Re: [milo-dev] Performance of Eclipse Milo
The foundation's C# library is maintained and good quality. If you're willing to use .NET it's not a bad choice. I don't think they have any support channel besides GitHub issues or much of a community though.

I've heard of FreeOpcUA but I'm not very familiar with its quality or its community.

Milo has some examples but is definitely lacking in documentation. A big push on docs is one of the TODOs before an eventual 1.0 release. Support is handled on the mailing list. When 1.0 is released I will likely offer a commercial support option for those who need it.

On Fri, May 17, 2019 at 4:07 AM Cihad Güzel <cihadgzl@xxxxxxxxx> wrote:
Hi Kevin,

Thanks for fast response. 

I didn't mention the OPC Foundation's Java Library.  Yes, you're right. They will no longer support Java library.
I only look for free open source libraries. Prosys library can not be considered.
They have C# library as well. And it seems, it is stabil and popular in community. They have well documented examples, but Eclipse Milo doesn't as I've seen.

On the other hand, there are another library provided by FreeOpcUA( https://github.com/FreeOpcUa).
And they have a good community behind, as well.

So, I am not looking for language spesific. I consider about community, documentation, support, bugs etc.
Have you ever made comparision with these libraries?

Rrgards



Kevin Herron <kevinherron@xxxxxxxxx>, 17 May 2019 Cum, 13:58 tarihinde şunu yazdı:
Well, for starters, the OPC Foundation's Java stack is now abandoned.

Even it were still maintained, it was only a stack, it did not include any SDK functionality. There's a weird line in the OPC toolkit ecosystem between stack and SDK. A stack is just the channels, serialization, data structures, and security, without any of the higher level functionality you need to build an application. An SDK adds high level functionality to the stack and makes it something you can actually use to build an application.

Eclipse Milo provides both a stack and SDK.

At this point, if you need an OPC UA toolkit for Java you only have two viable choices: 
- Eclipse Milo (free, open source)
- Prosys OPC UA Java SDK (paid, commercial)


On Fri, May 17, 2019 at 3:40 AM Cihad Güzel <cihadgzl@xxxxxxxxx> wrote:
Hi Kevin,

Thanks for answering my questions.

OPC is supported by OPC Foundation. As I've seen OPC Foundation has some libraries. I want to make the right decision.
Can you tell me why we use Eclipse Milo? What are the advantages and disadvantages comparing OPC Foundation libraries?

Regards

Kevin Herron <kevinherron@xxxxxxxxx>, 16 May 2019 Per, 15:33 tarihinde şunu yazdı:
The client is very fast, you will certainly be limited by the OPC UA server you are connected to.

If you're reading the same tags over and over it's best to use a subscription rather than the read service.

On Thu, May 16, 2019 at 1:19 AM Cihad Güzel <cihadgzl@xxxxxxxxx> wrote:
Hi,

Can you tell me the performance of client sdk?
For example, How many tag can be read from OPC UA server how frequently?
What about comparision of OPC Foundation client libraries about performance?
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