Patent ID: 8538922
Filing Date: 2013-09-17
Classification: G06F

Abstract:
1. A computer, comprising: memory for storing a program; the memory comprising a first epoch column pair associated with a first global identification (ID), wherein the first global ID has an available first maximum value; the memory comprising a second epoch column pair associated with a second global identification, wherein the second global ID has an available second maximum value; wherein the first epoch column pair and the second epoch column pair respectively comprise create timestamps and end timestamps for a plurality of tuples; and a processor, functionally coupled to the memory, the processor being responsive to computer-executable instructions contained in the program and operative for: upon receiving first snapshots, increasing the first global ID with each of the first snapshots; when the first global ID reaches a predefined value, switching to the second global ID associated with the second epoch column pair; wherein switching to the second global ID associated with the second epoch column pair comprises: upon receiving second snapshots, increasing the second global ID with each of the second snapshots; and resetting the first global ID and resetting the first epoch column pair, based on conditions comprising: