METHOD FOR MINIMAL SERVICE IMPACT DURING SOFTWARE UPGRADE IN NETWORK ELEMENTS (NES)

METHOD FOR MINIMAL SERVICE IMPACT DURING SOFTWARE UPGRADE IN NETWORK ELEMENTS (NES)

Exemplary methods include in response to receiving an indication to perform an in-service software upgrade (ISSU), an init process executing on a current root file system is configured to perform operations comprising: 1) releasing the current root file system by setting an indication that the ISSU...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OWENS Peter J, TATI Srikar, BHARATHI Vijayaraghavan
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:Exemplary methods include in response to receiving an indication to perform an in-service software upgrade (ISSU), an init process executing on a current root file system is configured to perform operations comprising: 1) releasing the current root file system by setting an indication that the ISSU is in progress, and terminating processes executing on the current root file system, and 2) switching from the current root file system to a new root file system by moving a root from the current root file system to the new root file system, moving critical system files from the current root file system to the new root file system, unmounting the current root file system, and executing an init process on the new root file system. The init process executing on the new root file system is configured to perform operations comprising starting processes on the new root file system.