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A Study on the Test Results and Implementation of Correlated Result Saving System using the Gluster File System  

Yeom, Jae-Hwan (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Oh, Se-Jin (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Roh, Duk-Gyoo (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Jung, Dong-Kyu (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Hwang, Ju-Yeon (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Oh, Chungsik (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Kim, Hyo-Ryoung (Radio Astronomy Division, Korea Astronomy and Space Science Institute)
Publication Information
Journal of the Institute of Convergence Signal Processing / v.17, no.2, 2016 , pp. 53-60 More about this Journal
Abstract
In this paper, we introduce the implementation and test results of a new method of correlated result storage to achieve the full performance of the Daejeon hardware correlator. Recently, the observation of 8 Gbps speed, which is the maximum observational standard of KVN(Korean VLBI Network), has been performed. The correlation processing using the Daejeon hardware correlator is also required. Therefore, a new correlation result storage introduction has become necessary. The maximum correlation result output speed of the Daejeon hardware correlator is 1.4 GB/sec per 25.6 ms integration time. The conventional correlation result storage system can not cope with the maximum correlation output speed of the Daejeon hardware correlator, and the output speed is limited to 1/4. That is, among the four input ports of the Daejeon hardware correlator, the three inputs are limited to correspond to the observation rate of 1 Gbps. This new storage system uses the Gluster file system among many of the latest technologies used in storage systems. In tests that meet the maximum output rate of 1.4 GB/sec for the Daejeon hardware correlator, 350 MB/sec for each of the four optical outputs, resulting in 1.4 GB/sec in total.
Keywords
KVN; KaVA(KVN and VERA Array); 8 Gbps Daejeon hardware correlator; Distributed Files System; Gluster File System;
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