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
Subscription Performance
February 11, 2015
9:05, EET
Avatar
cguerin
Vienna, Austria
Member
Members
Forum Posts: 20
Member Since:
April 9, 2013
sp_UserOfflineSmall Offline
sp_UserWebsite
Go to Top
1sp_Permalink sp_Print

Hi, I just tested your new released OPC UA Client.
It works well with my OPC UA Server.
Just a bit concerned about performance when monitoring “a lot” of monitoredItems.
For doing so your Client requires first to Read the NodeId multiple time for multiple property and also Browse multiple.
I counted almost 17 Read or Browse for 1 CreateMonitoredITems.
Maybe will be interressant to Read and Browse with one Request for all the NodeId or 10,20,50 per cents. It will be much more efficient.

Regards.
Camille.

March 12, 2015
12:02, EET
Avatar
Jouni Aro
Moderator
Moderators
Forum Posts: 1027
Member Since:
December 21, 2011
sp_UserOfflineSmall Offline
sp_UserWebsite
Go to Top
2sp_Permalink sp_Print

Sorry for the delayed answer. Just noticed that the server was keeping messages waiting for moderation, but had not notified anyone about that.

Yes, the reason for these extra calls is actually the usage of the SDK feature, AddressSpace.getNode(), which is used to fetch all meta information related to each node.

Will see if we can optimise that somehow in a future SDK.

February 15, 2016
10:21, EET
Avatar
pramanj
Member
Members
Forum Posts: 86
Member Since:
October 21, 2014
sp_UserOfflineSmall Offline
Go to Top
3sp_Permalink sp_Print

But CreatMonitoredItems will be a one time activity right? Even if its inefficient, reliability is more improtant than efficiency in my opinion.

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

Most Users Ever Online: 1919

Currently Online:
31 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

Heikki Tahvanainen: 402

hbrackel: 144

rocket science: 88

pramanj: 86

Francesco Zambon: 83

Ibrahim: 78

Sabari: 62

kapsl: 57

gjevremovic: 49

Xavier: 43

Member Stats:

Guest Posters: 0

Members: 793

Moderators: 7

Admins: 1

Forum Stats:

Groups: 3

Forums: 15

Topics: 1538

Posts: 6493

Newest Members:

sophiadavis, Waynegalse, Phillipbus, Oscarsat, WilliamJer, WilliamTunse, mvsjonah79, RaymondSmutt, Merlin AI pap, patlawrence98

Moderators: Jouni Aro: 1027, Pyry: 1, Petri: 0, Bjarne Boström: 1037, Jimmy Ni: 26, Matti Siponen: 353, Lusetti: 0

Administrators: admin: 1