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HOME > Monitoring_and_Data > Oceanic and Atmospheric Data > Reanalysis: Atmospheric Data > wgrib2-flush

wgrib2: -flush


In the normal scheme, output is buffered. That means the output is saved a memory buffer and only flushed (written out) when the buffer is full or the program ends. This normal scheme saves time when wgrib2 is writtng to disk files. This scheme fails when wgrib2 is writing to a pipe and another program is reading from that pipe. When wgrib2 is writting to a pipe, the output should flushed so that the process does not stall.

The -flush option causes wgrib2 to flush the output buffers after every write. This option is now rarely used because wgrib2 internally sets the flush option on when detects a write to a pipe. The only current need for the -flush option is when another program is reading the disk file that is being written by wgrib2. In this case, you would use this option to ensure that the disk file is written as soon as possible.



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Page last modified: Oct 6, 2017
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