Avatar

Please consider registering
guest

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
sp_Search Search
Advanced Search
Advanced Search

— Forum Scope —




— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

sp_Search Search
Go to Bottom
No permission to create posts
sp_Feed Topic RSS sp_TopicIcon
Server best practice for safety limits
October 20, 2023
16:01, EEST
Avatar
Francesco Zambon
Member
Members
Forum Posts: 78
Member Since:
December 20, 2021
sp_UserOfflineSmall Offline
Go to Top
1sp_Permalink sp_Print

Hello,

as in the demo we have set the “Safety limits” on our server:

// "Safety limits" for ill-behaving clients
opcUaServer.getSessionManager().setMaxSessionCount(500);
opcUaServer.getSessionManager().setMaxSessionTimeout(3600000);// one hour
opcUaServer.getSubscriptionManager().setMaxSubscriptionCount(50);

Where is this information published on the OPC UA tree?
As a best practice, are there any other limits to set?

Best regards,
Francesco

October 23, 2023
14:04, EEST
Avatar
Bjarne Boström
Moderator
Moderators
Forum Posts: 954
Member Since:
April 3, 2012
sp_UserOfflineSmall Offline
Go to Top
2sp_Permalink sp_Print

Hi,

I was going to answer that they are not available from the server address space, but seems 1.05 information model added some nodes below /Root/Objects/Server/ServerCapabilities for these. We could populate them in some future version automatically, but you can write the values for them manually in the current version, if you need them.

However, as that was only added in 1.05, it is unlikely that a lot of servers would yet have these.

As to the “As a best practice, are there any other limits to set?”, there are a lot of parameters you can configure. I cannot go into detail of all of them here or writing this would take days. Assuming run the server on a typical PC hardware, defaults should be ok.

October 23, 2023
16:30, EEST
Avatar
Francesco Zambon
Member
Members
Forum Posts: 78
Member Since:
December 20, 2021
sp_UserOfflineSmall Offline
Go to Top
3sp_Permalink sp_Print

Hi Bjarne,

Thanks for the reply.

We would need these nodes for one of our client’s applications, but we would prefer them to be managed automatically by the SDK.

Is there a release planned for this feature?

Regards,
Francesco

October 24, 2023
11:13, EEST
Avatar
Bjarne Boström
Moderator
Moderators
Forum Posts: 954
Member Since:
April 3, 2012
sp_UserOfflineSmall Offline
Go to Top
4sp_Permalink sp_Print

I have marked that in our issue list, but at the moment I do not know if we do this in the next release (nor when that will be).

No permission to create posts
sp_Feed All RSS
Go to top
Forum Timezone: Europe/Helsinki

Most Users Ever Online: 518

Currently Online:
13 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

hbrackel: 130

pramanj: 86

Francesco Zambon: 78

ibrahim: 75

rocket science: 73

Sabari: 62

kapsl: 57

gjevremovic: 49

Xavier: 43

TimK: 41

Member Stats:

Guest Posters: 0

Members: 665

Moderators: 16

Admins: 1

Forum Stats:

Groups: 3

Forums: 15

Topics: 1430

Posts: 6119

Newest Members:

sophiedavis, anitas, fakenatty, Negansaf, rheakempton93, JPasterkamp, mattiwenell, KevinGainy, jamiescooper, lonmackellar61

Moderators: Jouni Aro: 1002, Otso Palonen: 32, Tuomas Hiltunen: 5, Pyry: 1, Petri: 0, Bjarne Boström: 954, Heikki Tahvanainen: 402, Jukka Asikainen: 1, moldzh08: 0, Jimmy Ni: 26, Teppo Uimonen: 21, Markus Johansson: 42, Niklas Nurminen: 0, Matti Siponen: 297, Lusetti: 0, Ari-Pekka Soikkeli: 5

Administrators: admin: 1