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- W2023342925 abstract "The Atacama Large Millimeter /submillimeter Array (ALMA) will be a unique research instrument composed of at least66 reconfigurable high-precision antennas, located at the Chajnantor plain in the Chilean Andes at an elevation of 5000m. This paper describes the experience gained after several years working with the monitoring system, which has astrong requirement of collecting and storing up to 150K variables with a highest sampling rate of 20.8 kHz. The originaldesign was built on top of a cluster of relational database server and network attached storage with fiber channelinterface. As the number of monitoring points increases with the number of antennas included in the array, the currentmonitoring system demonstrated to be able to handle the increased data rate in the collection and storage area (only onemonth of data), but the data query interface showed serious performance degradation. A solution based on no-SQLplatform was explored as an alternative to the current long-term storage system. Among several alternatives, mongoDBhas been selected. In the data flow, intermediate cache servers based on Redis were introduced to allow faster streamingof the most recently acquired data to web based charts and applications for online data analysis." @default.
- W2023342925 created "2016-06-24" @default.
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- W2023342925 date "2014-07-18" @default.
- W2023342925 modified "2023-10-18" @default.
- W2023342925 title "Exploring No-SQL alternatives for ALMA monitoring system" @default.
- W2023342925 cites W2094195274 @default.
- W2023342925 doi "https://doi.org/10.1117/12.2055880" @default.
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