When saving data from multiple Vantage Pro Weather Consoles in the
MySQL database each Weather Console must be identified to vproweather
with a unique number using the -j, --consoleID=num option. By default
vproweather assigns ID 0 to the Weather Station when the -j,
--consoleID=num is not used. Failure to specify unique Weather Console
ID's when running vproweather for multiple Weather Stations will result
in the data being stored in the MySQL database looking like it all came
from a single Vantage Pro Weather Console.

If multiple Vantage Pro Weather Consoles are connected to a single
computer vproweather can simply be run identifying each Weather Console
with a unique number using the -j, --consoleID=num option and using that
Weather Console's correct serial communication device.

vproweather -Q -EIMNglxt  /dev/ttyS0

vproweather -Q -EIMNglxt --consoleID=1 /dev/ttyS1

vproweather -Q -EIMNglxt --consoleID=2 /dev/ttyS2

If the multiple Vantage Pro Weather Consoles are each connected to
separate computers and you would like to combine the data from each
Weather Station into a single database on a periodic basis you can do
so using the Export and Import options. *However* you must *still* run
vproweather on each computer for each Weather Station with a unique
identifier using the -j, --consoleID=num. Failure to do so then
exporting and importing the data will result in the data being stored
in the MySQL database looking like it came from one instead of separate
Vantage Pro Weather Consoles.
 
To Export data to a file:

vproweather -Eo my.export.id1 -j 1

Where
my.export.id1 is the file that will contain the exported data

This command will export all the data contained in the database for the
Vantage Pro Weather Console identified as #1

vproweather -Eo my.export.id1:20120101 -j 1

Where
my.export.id1 is the file that will contain the exported data
20120101 is the start date for the data to be exported and is inclusive

This command will export the data contained in the database starting on
20120101 for the Vantage Pro Weather Console identified as #1

vproweather -Eo my.export.id1:20120101:20120701 -j 1

Where
my.export.id1 is the file that will contain the exported data
20120101 is the start date for the data to be exported and is inclusive
20120701 is the end date for the data to be exported and is exclusive

This command will export the data contained in the database starting on
20120101 and ending with 20120630 for the Vantage Pro Weather Console
identified as #1

To Import data from a Exported file

vproweather -Ei my.export.id1

This command will import all the data contained in the file my.export.id1
for the Vantage Pro Weather Console ID that was used (identified) in the
export

As an example as to how long a data export and import takes, on a AMD 
Phenom 1090T 6 core 3.2GHz system with 16G of memory:

An export of a full years worth of data completed in around 22 seconds and 
exported a little over 1 million rows creating a 160M file.

Importing that same data on the same system took 30 minutes due to the 
validation on whether to insert or update the data thus preventing 
duplication of any data.


