dz_create_rrd.in

这是一个以JAVA编写的程序,本人还没有试过,是一个简单的温度控制系统

#! /bin/sh

# $Id: dz_create_rrd.in,v 1.2 2004/02/29 18:16:44 vtt Exp $

# This script takes creates an RRD database according to a given order,
# taken from a device order file, ${RRD_ORDER}. The database will be created
# in ${RRD_DIR}. Starting time for the database will be taken from the data
# in ${RRD_TRACE}.

# These values are set forth by configure script.

RRD_ORDER=@RRD_ORDER@
RRD_DIR=@RRD_DIR@
RRD_TRACE=@RRD_DIR@/trace

RRD=${RRD_DIR}/dz.rrd

# VT: NOTE: Of course, I could've provided different exit code for each
# case, but who really cares?

# Let's see if we have the rrdtool

if @TEST@ "@RRDTOOL@" = "/bin/false" ; then
    @ECHO@ "Sorry, you don't have rrdtool - install it and/or rerun configure";
    exit -1;
fi

# If the order file doesn't exist, then you know what

if @TEST@ ! -r "${RRD_ORDER}" ; then
    @ECHO@ "No order file (${RRD_ORDER}) found or it isn't readable, can't create the RRD database.";
    exit -1;
fi

# Let's figure out the start date for the database. If the trace file
# doesn't exist, then we won't bother. Otherwise, the time of the first
# record in the trace file will be set as the start date for the database.

if @TEST@ ! -r "${RRD_TRACE}" ; then
    @ECHO@ "No trace file (${RRD_TRACE}) found or it isn't readable, can't create the RRD database.";
    exit -1;
fi

START_DATE=`@HEAD@ -1 ${RRD_TRACE}|@CUT@ -f 1 -d ":"`

if @TEST@ -z "${START_DATE}" ; then
    @ECHO@ "Can't get start date from ${RRD_TRACE}, it looks funny";
    exit -1;
fi

# Adjust the start time so the first entry is not discarded - RRD doesn't
# like the entry with the same timestamp as the database start time

START_DATE=$((${START_DATE}-10))

COMMAND="@RRDTOOL@ create ${RRD} --start ${START_DATE} --step 30 ";

# Let's put together the argument list now

ARG=""

# VT: Don't ask me about these numbers, I don't remember

for DEVICE in `@CAT@ ${RRD_ORDER}` ; do
    ARG="${ARG} DS:${DEVICE}:GAUGE:90:0:50"
done

ARG="${ARG} \
RRA:LAST:0.5:1:5760 \
RRA:MAX:0.5:1:5760 \
RRA:MIN:0.5:1:5760 \
RRA:AVERAGE:0.5:5:13824 \
RRA:MAX:0.5:5:13824 \
RRA:MIN:0.5:5:13824 \
RRA:AVERAGE:0.5:60:16704 \
RRA:MAX:0.5:60:16704 \
RRA:MIN:0.5:60:16704 \
RRA:AVERAGE:0.5:1440:50000 \
RRA:MAX:0.5:1440:50000 \
RRA:MIN:0.5:1440:50000"
                                                                

#@ECHO@ "Executing:"
#@ECHO@ ""
#@ECHO@ "${COMMAND} ${ARG}"

${COMMAND} ${ARG}