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DELT element migration: is there a timer defined on it before the operation fails?

Solved493 views20th June 2024adl2099 DELT element migration
4
Alberto De Luca [DevOps Enabler]4.58K 17th April 2024 0 Comments

Hi Dojo,

When using the DELT migration, in case of a network timeout impacting the comms between source & destination server in the cluster, is there a chance the migration would still complete if the comms are quickly restored?

Essentially, is there a timer // time to wait // before the operation would abort?
And in the worst case scenario that the element goes lost, what are the ways to retrieve it?

Thanks

Alberto De Luca [DevOps Enabler] Selected answer as best 20th June 2024

1 Answer

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Simon Declerck [SLC] [DevOps Advocate]829 Posted 17th June 2024 1 Comment

Hi Alberto,

When using the migration functionality of DELT within a cluster a network outage between the source & destination will interrupt the process if it happens during the transfer of the DELT package.

Once a DELT export/import/migration has started there is no specific way of cancelling this. The system will execute this until it has completed or until one of its steps encounters an exception. A network outage during the migration at the time of transferring the package will result in a timeout exception occurring which will stop the migration from proceeding. Depending on the timing of this outage, the element may already have been deleted from the source system.

To monitor the progress of all DELT actions on the system you can check the SLDELT log file on both the source & destination server.

As for recovery of lost elements,
When performing a migration, the system really performs an export on the source, deletes the element and then proceeds to transfer the package to the destination and import it there.
As such, you can recover any lost elements by connecting to the source system and browsing to C:\Skyline DataMiner\System Cache\DELT\Export. in this directory you can find all of the recently exported DELT packages.
You can manually copy this package over to the destination server and import it there.

Alberto De Luca [DevOps Enabler] Selected answer as best 20th June 2024
Alberto De Luca [DevOps Enabler] commented 20th June 2024

Thanks for this detailed answer, Simon.
Marking as solved

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