[rrd-users] update

[zura baizura]

hello..

i want to ask about update data.
in tutorial the data is keep in . but i dont know why
my data is not keep like  in tutorial rrdtool. as u
can see here, i use crontab. every 5 minute the
crontab run my script, the data previous data is
disappear , it mean that only that time data are keep
in.

Date: Fri, 16 Mar 2007 16:25:01 +0800
Message-Id:
<200703160825.l2G8P1ov003640 at localhost.localdomain>
From: root at localhost.localdomain (Cron Daemon)
To: root at localhost.localdomain
Subject: Cron <root at localhost>
/home/baizura/percubaan/lost.sh
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>

2.0
1174033501
                         voltan

1174031400: nan
1174031700: nan
1174032000: nan
1174032300: nan
1174032600: nan
1174032900: nan
1174033200: nan
1174033500: 2.0000000000e+00
1174033800: nan
0x0


>From root at localhost.localdomain  Fri Mar 16 16:30:01
2007
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Date: Fri, 16 Mar 2007 16:30:00 +0800
Message-Id:
<200703160830.l2G8U0te003721 at localhost.localdomain>
From: root at localhost.localdomain (Cron Daemon)
To: root at localhost.localdomain
Subject: Cron <root at localhost>
/home/baizura/percubaan/lost.sh
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>

2.0
1174033800
                         voltan

1174031400: nan
1174031700: nan
1174032000: nan
1174032300: nan
1174032600: nan
1174032900: nan
1174033200: nan
1174033500: nan
1174033800: 2.0000000000e+00
1174034100: nan
0x0

>From root at localhost.localdomain  Fri Mar 16 16:35:01
2007
Return-Path: <root at localhost.localdomain>
Received: from localhost.localdomain
(localhost.localdomain [127.0.0.1])
	by localhost.localdomain (8.12.5/8.12.5) with ESMTP
id l2G8Z1E3003814
	for <root at localhost.localdomain>; Fri, 16 Mar 2007
16:35:01 +0800
Received: (from root at localhost)
	by localhost.localdomain (8.12.5/8.12.5/Submit) id
l2G8Z1lD003807
	for root; Fri, 16 Mar 2007 16:35:01 +0800
Date: Fri, 16 Mar 2007 16:35:01 +0800
Message-Id:
<200703160835.l2G8Z1lD003807 at localhost.localdomain>
From: root at localhost.localdomain (Cron Daemon)
To: root at localhost.localdomain
Subject: Cron <root at localhost>
/home/baizura/percubaan/lost.sh
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>

2.0
1174034101
                         voltan

1174031400: nan
1174031700: nan
1174032000: nan
1174032300: nan
1174032600: nan
1174032900: nan
1174033200: nan
1174033500: nan
1174033800: nan
1174034100: 2.0000000000e+00
1174034400: nan
0x0
 ----------------------------------------------

as u can see above every 5 minute , only the new data
are keep in. i want to ask whether rite or wrong im
using crontab to run my script and my script is to
update data .
please someone explain to me about the flow to plot
the graph using rrdtool as im afraid im walking in
wrong way. :-(


 
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