Re: [rrd-users] Not corect numbers in rrd ?
This is a discussion on Re: [rrd-users] Not corect numbers in rrd ? within the RRD Users forums, part of the Networking and Network Related category; This is a multi-part message in MIME format. --===============0775111798== Content-Type: multipart/alternative; boundary="----=_NextPart_000_009C_01C7B1A8.A9AD2FB0" This ...
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06-18-2007
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Re: [rrd-users] Not corect numbers in rrd ?
This is a multi-part message in MIME format.
--===============0775111798== Content-Type: multipart/alternative; boundary="----=_NextPart_000_009C_01C7B1A8.A9AD2FB0" This is a multi-part message in MIME format. ------=_NextPart_000_009C_01C7B1A8.A9AD2FB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: VladoPortos=20 To: rrd-users@lists.oetiker.ch=20 Sent: Monday, June 18, 2007 6:21 AM Subject: [rrd-users] Not corect numbers in rrd ? Hi all, i made a graph which show online users and getting data from mysql and = so on... but when i look on what data are feeded to rrd they look like this: 58 38 and in rrd it looks like this: 1182109560: 5.8000000000e+01 3.7985531650e+01 But in graph last values are 58 (OK) and second one is 37 ( not OK ) Any idea what im doing wrong ? If you want (a better chance of) the exact numbers out that you put in, = you must be sure you enter the data at the exact time which matches the = steps. So do not enter the data at "now", but calculate the time exactly at eg = 12:00:00 If you run a cron job at 12:00, it might be finished and enter the data = at 12:00:01, and RRD interpolates by "drawing a straight line" between = the last time-corrected data and 12:00:01. Eg, if the value at 11:58:00 was 37 and 12:00:01 was 38, at 12:00:00 it = would be 37.985531650=20 (the calculation is just an example, not the right values (probably)) What works for me in my is storing the timestamp at the start of the = script and using it later when I enter the data, my scripts takes quite = a few seconds, because they fetch and parse data from webpages. My cron = manages to start the job in the right seconds mostly, it doesn't matter = for me if it slips a second or two. Leif ------=_NextPart_000_009C_01C7B1A8.A9AD2FB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1595" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <BLOCKQUOTE=20 style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV> <DIV=20 style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B>=20 <A title=3Dvladoportos@bancodata.eu=20 href=3D"mailto:vladoportos@bancodata.eu">VladoPort os</A> </DIV> <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A = title=3Drrd-users@lists.oetiker.ch=20 = href=3D"mailto:rrd-users@lists.oetiker.ch">rrd-users@lists.oetiker.ch</A>= </DIV> <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, June 18, 2007 = 6:21 AM</DIV> <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [rrd-users] Not corect = numbers=20 in rrd ?</DIV> <DIV><BR></DIV> <DIV>Hi all,<BR><BR>i made a graph which show online users and getting = data=20 from mysql and so<BR>on...<BR><BR>but when i look on what data are = feeded to=20 rrd they look like this:<BR><BR>58 38<BR><BR>and in rrd it looks like=20 this:<BR><BR>1182109560: 5.8000000000e+01 3.7985531650e+01<BR><BR>But = in graph=20 last values are 58 (OK) and second one is 37 ( not OK )<BR><BR>Any = idea what=20 im doing wrong ?</DIV> <DIV><BR> </DIV></BLOCKQUOTE> <DIV><FONT face=3DArial size=3D2>If you want (a better chance of) the = exact numbers=20 out that you put in, you must be sure you enter the data at the exact = time which=20 matches the steps.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>So do not enter the data at "now", but = calculate=20 the time exactly at eg 12:00:00</FONT></DIV> <DIV><FONT face=3DArial size=3D2>If you run a cron job at 12:00, it = might be=20 finished and enter the data at 12:00:01, and RRD interpolates by = "drawing a=20 straight line" between the last time-corrected data and = 12:00:01.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Eg, if the value at 11:58:00 was 37 and = 12:00:01=20 was 38, at 12:00:00 it would be <FONT face=3D"Times New Roman" = size=3D3>37.985531650=20 </FONT></FONT></DIV> <DIV>(the calculation is just an example, not the right values = (probably))</DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>What works for me in my is storing the = timestamp at=20 the start of the script and using it later when I enter the data, my = scripts=20 takes quite a few seconds, because they fetch and parse data from = webpages. My=20 cron manages to start the job in the right seconds mostly, it doesn't = matter for=20 me if it slips a second or two.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial = size=3D2>Leif</FONT></DIV></FONT></DIV></BODY></HTML> ------=_NextPart_000_009C_01C7B1A8.A9AD2FB0-- --===============0775111798== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users --===============0775111798==-- 
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