Patent ID: 7380080
Filing Date: 2008-05-27
Classification: G06F

Abstract:
1. An apparatus for calculating unneeded data storage credits for a data transmission to a pair of storage devices, comprising: a subtractor having a first input, a second input, and an output, said first input being connected to a signal carrying a measure of free space in a first of said storage devices, said second input being connected to a signal carrying a measure of free space in a second of said storage devices, and said output carrying a free space difference signal; an adder having a first input connected to at least a portion of said free space difference signal for said pair of storage devices, and having a second input connected to a new entry count signal for a fuller storage device of said pair of storage devices; a comparator having a first input connected to an output of said adder, and having a second input connected to a new entry count signal for an emptier storage device of said pair of storage devices, said comparator having an output signal carrying whichever of said first input and said second input had a smaller value or a predetermined one of said first and second inputs if said first input and said second input had equal values; and a switch having a first input connected to said comparator output, and having a second input connected to said new entry count signal for said emptier storage device, said switch having an output carrying said indication of unneeded data storage credits.