DOI: 10.25136/2644-5522.2017.4.23799

Abstract: This article concerns the issue of improving performance when processing large amounts of information in data warehouses (storages). The main purpose is to increase the speed of the process of wiping out information in the cache of data warehouses, and, consequently to improve the processing speed of the cached data. The subject of research involves the algorithms of data extortion LRU1 and LRU2, as well as and structural organization of the control table. The article proposes the implementation of algorithms for wiping out information in the data warehouse cache on the basis of an associative data array. The results of a comparative analysis of the basic algorithms of information displacement used in the operational memory of computer systems (LRU, LFU, FIFO, Random) are presented in this article. The results of the development of algorithms for accelerated information extrusion in the cache of data warehouses are also presented. The author construes the systems of canonical equations for these algorithms are. The  mathematical model, which is used by the author,  is an executable formalized specification allowing for a direct transition from the DCS (the system of canonical equations) to the further hardware or software implementation of the proposed algorithms.

DOI: 10.7256/2306-4196.2015.5.17035

Abstract: The article discusses the implementation of a productive and reliable cluster with low cost. As a solution, the authors recommend building a cluster system based on the PCI Express data input / output protocol. The main goal is to find ways to increase the productivity of the cluster system and its circuit protection. The subjects of the study are the algorithms for data transfer and processing on the switch, algorithms for search and displacement data in storage system, switch ports arbitration scheme. The research methodology includes structured systems analysis in the domain of the connection structures, the construction of cache storage, methods of constructing cluster systems. The authors propose the following structural and algorithmic solutions: a modified algorithm for address translation of the external PCI Express Switch; an improved method and algorithm for data searching and processing in the cache data storage systems based on a unique hash; formalization of all stages of arbitration algorithms for ports and virtual switch channels.