1. A method for utilizing a global digests cache in a deduplication process in a data deduplication system using a processor device in a computing environment, comprising: partitioning input data into input data chunks, each of the input data chunks having a size of at least 16 Megabytes (MB); calculating input digest values for each of the input data chunks; finding positions of similar repository data in a repository of data for each of the input data chunks; locating and loading repository digests of the similar repository data into the global digests cache, wherein the global digests cache contains, prior to the loading of the repository digests of the similar repository data, at least a plurality of digests previously loaded by a plurality of deduplication processes; matching input digests of the input data chunks and the repository digests contained in the global digests cache for locating data matches; and using the positions of the similar repository data to locate and linearly load into the global digests cache, digests and digest block boundaries of the similar repository data in a sequence corresponding to a placement order of calculated values of the digests of the similar repository data, the placement order of the calculated values of the digests of the similar repository data correlative to an order in which the input digest values were individually calculated such that the digests of the similar repository data are each individually stored in the global digests cache based on a calculation time and order of when each of the input digests were first calculated when in un-deduplicated form, thereby storing the digests of the similar repository data in a linear and sequential form independent of a deduplicated form by which data the digests describe is stored, wherein the global digest cache comprises a pool of a plurality of sequential arrays of digest entries of the digests and a hash table for pointing to contents within the plurality of sequential arrays.