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A New Algorithm to Store and Transfer VLBI Data to the Software Correlator of the Russian Academy of Sciences

I. A. Bezrukov, A. V. Vylegzhanin, Y. L. Kurdubova, V. Y. Mishin, A. I. Salnikov, V. A. Yakovlev

Transactions of IAA RAS, issue 46, 3–9 (2018)

Keywords: VLBI, ‘Quasar’ VLBI network, RT-13, VLBI Global Observing System (VGOS), data storage, data transfer, Link Aggregation Control Protocol (LACP), software correlator, HDD arrays.

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Abstract

About 20 Tbytes of observational VLBI data which are received from the RT-13 radio telescopes (IAA RAS “Badary” and “Zelenchukskaya” observatories) are buffered preliminarily every day in the St. Petersburg data storage system. Then these data are transferred to the correlator in the RAS Correlation Processing Center via the local network. The RAS software correlator is developed in the Correlation Processing Center of the Russian Academy of Sciences. Data integrity and high speed of its delivery are the main requirements for the data exchange process between the data storage system and the correlator. The data storage system servers and the correlator are connected to the RAS Correlation Processing Center local network through a switchboard with 10 GbE ports to meet these requirements. Our article contains recommendations to improve the software of the storage system which are based on the data storage system operating experience. The upgraded software of the data storage systems will increase the disc memory, the speed of data exchange, and fault-tolerance.

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I. A. Bezrukov, A. V. Vylegzhanin, Y. L. Kurdubova, V. Y. Mishin, A. I. Salnikov, V. A. Yakovlev. A New Algorithm to Store and Transfer VLBI Data to the Software Correlator of the Russian Academy of Sciences // Transactions of IAA RAS. — 2018. — Issue 46. — P. 3–9.

@article{bezrukov2018,
  abstract = {About 20 Tbytes of observational VLBI data which are received from the RT-13 radio telescopes (IAA RAS “Badary” and “Zelenchukskaya” observatories) are buffered preliminarily every day in the St. Petersburg data storage system. Then these data are transferred to the correlator in the RAS Correlation Processing Center via the local network. The RAS software correlator is developed in the Correlation Processing Center of the Russian Academy of Sciences. Data integrity and high speed of its delivery are the main requirements for the data exchange process between the data storage system and the correlator. The data storage system servers and the correlator are connected to the RAS Correlation Processing Center local network through a switchboard with 10 GbE ports to meet these requirements. Our article contains recommendations to improve the software of the storage system which are based on the data storage system operating experience. The upgraded software of the data storage systems will increase the disc memory, the speed of data exchange, and fault-tolerance.},
  author = {I.~A. Bezrukov and A.~V. Vylegzhanin and Y.~L. Kurdubova and V.~Y. Mishin and A.~I. Salnikov and V.~A. Yakovlev},
  doi = {10.32876/ApplAstron.46.3-9},
  issue = {46},
  journal = {Transactions of IAA RAS},
  keyword = {VLBI, ‘Quasar’ VLBI network, RT-13, VLBI Global Observing System (VGOS), data storage, data transfer, Link Aggregation Control Protocol (LACP), software correlator, HDD arrays},
  pages = {3--9},
  title = {A New Algorithm to Store and Transfer VLBI Data to the Software Correlator of the Russian Academy of Sciences},
  url = {http://iaaras.ru/en/library/paper/1870/},
  year = {2018}
}

TY  - JOUR
TI  - A New Algorithm to Store and Transfer VLBI Data to the Software Correlator of the Russian Academy of Sciences
AU  - Bezrukov, I. A.
AU  - Vylegzhanin, A. V.
AU  - Kurdubova, Y. L.
AU  - Mishin, V. Y.
AU  - Salnikov, A. I.
AU  - Yakovlev, V. A.
PY  - 2018
T2  - Transactions of IAA RAS
IS  - 46
SP  - 3
AB  - About 20 Tbytes of observational VLBI data which are received from
the RT-13 radio telescopes (IAA RAS “Badary” and “Zelenchukskaya”
observatories) are buffered preliminarily every day in the St.
Petersburg data storage system. Then these data are transferred to
the correlator in the RAS Correlation Processing Center via the local
network. The RAS software correlator is developed in the Correlation
Processing Center of the Russian Academy of Sciences. Data integrity
and high speed of its delivery are the main requirements for the data
exchange process between the data storage system and the correlator.
The data storage system servers and the correlator are connected to
the RAS Correlation Processing Center local network through a
switchboard with 10 GbE ports to meet these requirements. Our article
contains recommendations to improve the software of the storage
system which are based on the data storage system operating
experience. The upgraded software of the data storage systems will
increase the disc memory, the speed of data exchange, and fault-
tolerance.
DO  - 10.32876/ApplAstron.46.3-9
UR  - http://iaaras.ru/en/library/paper/1870/
ER  -