NetXMS Support Forum

Hi guys, I have a little question about DCI..

NetXMS works well but when a node goes down or get "DCI unsupported" due to an SNMP error, interface status changed, .... we lost all data stored in our dB for this DCI

This is normal? How can i solve this problem?

Thanks!

Certainly NOT normal.

But with the given information ... helping is impossible.
What version is used? How are the DCIs configured? An example of what happend? Have you tried to debug?

Hi, we are using NetXMS 2.0.8. under Windows Server 2008 R2 and MySQL. I will try to explain my problem to easily understanding

We have some wireless link under monitoring with the next DCI's:

- Wireless Link Signal
- Wireless Link Capacity
- Ethernet Throughtput
- Frecuency
- Ethernet Speed
- ...

For example, if remote unit goes down, the DCI values for wireless link signal and capacity on AP are Invalid/Unsupported (this is normal) but the previously data stored in dB for this DCI are lost.

This problem appears only in a few nodes because other nodes with this problem stores data perfectly in dB

Thanks!

Hi,

are you using instance discovery?

Best regards,
Victor

Hi Victor,

Yes i am using instance discovery

Thanks!

One possible reason is instances disappearing and re-appearing. If on one configuration poll instance is missing server will detele DCIs for that instance, and create new DCIs when instance appears again. You can check if this is the case by noting DCI IDs and check if they are changing.

Best regards,
Victor

I believe there is an open feature request to "cache" instance discovery DCIs so they are not deleted right away but only after some time (or a number of polls, but ideally something that is configurable per instance discovery DCI).

Are there plans for an implementation in one of the next 2.1 releases?

Cheers

Yes, I think it's quite important. I'll try to schedule it for 2.1-RC1.

Best regards,
Victor

Ok, thank you very much