That's not a bad idea, at least for historical data.
But actually one of the most common thing in sensor network monitoring is last readings monitoring.
With indexes what I can do is : SELECT * FROM measures_xx ORDER BY timestamp DESC LIMIT 1 => And I got the very last reading in a blink (one page reading only).
It shall be complicated that way... it can only be done by a mass update on a table each time I receive a packet...
Also it's very important to have last 24h readings aggregate by hour or minutes (to plot a graph).
So I can't go that way.... I think I must keep the timestamp index where it is but I should probably get rid of the others.
Thank you again for your help people
Regards
Loic Petit
But actually one of the most common thing in sensor network monitoring is last readings monitoring.
With indexes what I can do is : SELECT * FROM measures_xx ORDER BY timestamp DESC LIMIT 1 => And I got the very last reading in a blink (one page reading only).
It shall be complicated that way... it can only be done by a mass update on a table each time I receive a packet...
Also it's very important to have last 24h readings aggregate by hour or minutes (to plot a graph).
So I can't go that way.... I think I must keep the timestamp index where it is but I should probably get rid of the others.
Thank you again for your help people
Regards
Loic Petit
