#!/bin/bash
#                       /usr/local/bin/silver.rrd.create
#  http://crystalfaeries.net/posix/bin/silver.rrd.create
# celeste:crystalfaery 2020-09-06 01:45:15+00:00
# create our silver rrd database
/usr/local/bin/silverlog				# agregate data
line="`head -n 1 /usr/local/share/ag/silverlog.txt`"	# oldest data-point
price=$(echo $line | sed 's/^.*KitCoAg: //g')		# oldest price
datstr="$(echo $line | sed 's/ KitCoAg.*$//g')"		# oldest date-time
datim=$(date -d "$datstr" +%s)				# in UNIX format
rrdtool create /usr/local/share/ag/silver.rrd	\
--step 900					\
DS:KitCoAg:GAUGE:3666:0:U			\
RRA:LAST:0.5:1:32768				\
RRA:LAST:0.5:4:32768				\
RRA:MIN:0.5:96:8192				\
RRA:AVERAGE:0.5:96:8192				\
RRA:MAX:0.5:96:8192				\
RRA:HWPREDICT:8192:0.5:0.5:8192