Patent ID: 9582510
Date: 2017-02-28
CPC Classifications: G06F

Claim:
1. A method for upgrading a system, the method comprising: migrating a copy of data from a first computing system to a communicatively coupled second computing system at a first time during a system upgrade, wherein access to the first computing system is disabled during the migrating at the first time; at subsequent times during the system upgrade, migrating a copy of changed data, the copy of the changed data being migrated from the first computing system to the second computing system until a threshold is reached, wherein access to the first computing system is enabled and maintained live during the migrating at the subsequent times, wherein the migrating of the copy of the changed data at the subsequent times includes updating corresponding migrated data requiring transformation in data structure by: in response to reaching the threshold, migrating a copy of remaining changed data from the first computing system to the second computing system, wherein access to the first computing system is disabled during the migrating of the remaining changed data.