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From: Ralph L. <Ral...@be...> - 2010-07-28 14:23:47
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On 28.07.2010 08:39, Dalesio, Leo wrote: > > This sends the entire archive data. The server should be able to > compress this into a statistical sample. I would propose: > > for each sample > sample start time - in unix gmt (should convert to ascii in the > client side) > Should be our VTimestamp: POSIX time stamp plus the additional 32 int (that might be a pulse id or something completely different) > number of samples > Also needs the sample end time, or (alternatively) the sample duration > first value > last value > mean > Median or average? both? > high > low > first standard deviation > All this is for atomic numerical values only. What about strings, enums, waveforms? How is the metadata (enum choices, alarm status) represented? Ralph |
