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[Discuss-gnuradio] Streaming IQ File Compression

From: Dave NotTelling
Subject: [Discuss-gnuradio] Streaming IQ File Compression
Date: Fri, 15 Jul 2016 23:59:56 -0400

Anyone have experience with streaming 100+ MSPS of 16 bit IQ data through a compression tool and then to disk?  I'd like to be able to take really wide band snaps for several minutes.  Currently that would take up 16 * 2 * SAMP_RATE bits per second.  So, for 200 MSPS that would end up being 800 MBytes/s.  That rate eats up a hard drive pretty quickly.  Running it through gzip by way of pigz was my first thought, but even on an 8 core Intel machine pigz just can't keep up.  I can sustain maybe 300 MBytes/s but that's it.  And I know it's not a hard disk limitation as the M.2 drive I am using can easily sustain 800 MBytes/s of uncompressed data.


Thank you!


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