| 摘要 |
The present document describes a method and system for providing Hybrid On Demand (HOD) software and/or data to a plurality of normal nodes associated with a work unit. The normal nodes are serviced via two or more parent nodes using different communication networks. Normal nodes, which are connected to the Local Area Network (LAN) of the work unit, may receive software and/or data services from a local node via the LAN, and normal nodes which are outside of the LAN may receive software and/or data services from a SUPR node via a Wide Area Network (WAN) such as the internet. After synchronization with one the normal nodes, the parent nodes synchronize the updated data with each other, and then they push the updated data to all the normal nodes associated with the work unit to mirror the same data on all the normal nodes. Frequencies of synchronization and provision of software and/or data services and/or updates is governed by a set of synchronization rules that are embedded in the business layer of the nodes. This scenario may also be used for synchronizing data in a cache cloud manner between the different nodes of the wide and the local networks.
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