Techniques are provided for providing mappings between logical time values and real time values in a multinode system.

It deals with time clocks logical to real....in this instance it deals with updating data structures from one environment to another.

volatile to non-volatile

The techniques include, if a first event occurs, then writing an LTV-to-RTV mapping to a non-volatile data structure. If a second event occurs, then a check is performed to determine whether any of the LTV-to-RTV mappings in the volatile data structure are newer than all LTV-to-RTV mappings in a non-volatile data structure. If there are newer mappings in the volatile data structure, then one or more LTV-to-RTV mappings are written to the non-volatile data structure based on those “newer” LTV-to-RTV mappings from the volatile data structure. Upon receiving a request an LTV for a particular RTV, the particular RTV is determined based on information from an information source such as the volatile data structure or the non-volatile data structure.

e.Digital does not up date data structures between volatile and non- volatile environments. Their process is controlled entirely within the non volatile environment, where there's only a small cache out in front of it.

Maybe there are related claims deeper in the patent, however, from first glance nothing strikes me.

doni