Software and Hardware for Distributed Systems and Supercomputers

Article # 14_2018

18 с.

PDF

I. A. Chernov, N. N. Nikitina
Effective scanning of parameter space in a Desktop Grid for identification of a hydride decomposition model

We consider parameter identification of a hydride decomposition model by scanning the parameter space in parallel. Such problem is resource demanding, but suits best for Desktop Grid computing. Considering task retrieval as a game, we show that the search process can be improved to produce solutions faster in comparison with random search, with no or minor additional cost. (In Russian).

Key words: Desktop Grid, task scheduling, BOINC, Enterprise Desktop Grid, high-throughput computing, distributed computing, modeling of hydride decomposition

article citation

DOI

Article # 23_2018

14 с.

PDF

Y. V. Shevchuk
Vbinary: variable length integer coding revisited

The article introduces Vbinary, a parametrized variable-length prefix integer coding. The coding is considered by means of examples in comparison with existing codings, including Golomb/Rice and Elias codings. A naming schema is proposed that allows to specify the coding parameters concisely. Vbinary conding uses unusual n-ary extension technique which makes the coding versatile, usable for both bit-based and byte-based data streams. By varying parameters, Vbinary coding can be made efficient for small numbers or large numbers, tailored to specific data distribution, tuned for efficient encoding and decoding. Potential uses for the coding are network protocols, on-disk and in-memory data representation, and final stages of data compression algorithms.

Key words: coding of integers, variable length coding, prefix code, parametrized coding, data compression.

article citation

DOI

Article # 30_2018

15 с.

PDF

Andrey Kamenshchikov, Aleksandr Oleynikov, Tamara Shirobokova
Standards of the interoperability in a high-performance environment

The analysis of the interoperability problem in a high-performance secure environment abroad and in our country was made. This analysis was based on a comparison of GRID, supercomputers, clusters and clouds. The increase in the heterogeneity level and the activity of the use of high-performance secure environment is shown. The authors experience in solving the of interoperability problem is briefly described, and it is proposed to apply the methodology for ensuring interoperability for wide class systems, fixed in GOST R 55062-2012, for a high-performance environment. (In Russian).

Key words: GRID, supercomputers, clusters, clouds, interoperability, standards, information security.

article citation

DOI

Article # 35_2018

15 с.

PDF

Y. V. Shevchuk
Vbinary: variable length integer coding revisited

The article introduces Vbinary, a parametrized variable-length prefix integer coding. The coding is considered by means of examples in comparison with existing codings, including Golomb/Rice and Elias codings. A naming schema is proposed that allows to specify the coding parameters concisely. Vbinary conding uses unusual n-ary extension technique which makes the coding versatile, usable for both bit-based and byte-based data streams. By varying parameters, Vbinary coding can be made efficient for small numbers or large numbers, tailored to specific data distribution, tuned for efficient encoding and decoding. Potential uses for the coding are network protocols, on-disk and in-memory data representation, and final stages of data compression algorithms. (In Russian).

Key words: coding of integers, variable length coding, prefix code, parametrized coding, data compression.

article citation

DOI