[rrd-users] One writer, multiple readers

permalink · #1 (**permalink**) 04-22-2008

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Hello all
=20
In my setup I have one program writing to my rrd files
using rrdtool executable.
=20
I have, until now, only had one program reading my rrd files
using rrdgraph.
=20
We are, in the future going to also use CGI to run rrtdump
on the rrd files.
=20
It is likely that the 2 processes will try to read the same
file at the same time (eventually)
=20
Do I need to worry about multiple readers? Do I need
to implement some sort of reader lock external to the
rrd tool processes?
Thanks
--
jack

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<HTML dir=3Dltr><HEAD>=0A=
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Dunicode">=0A=
<META content=3D"MSHTML 6.00.6000.16640" name=3DGENERATOR></HEAD>=0A=
<BODY>=0A=
<DIV><FONT face=3DArial color=3D#000000 size=3D2>Hello all</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>=0A=
<DIV><FONT face=3DArial size=3D2>In my setup I have one program writing =
to my rrd files</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>using rrdtool executable.</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>=0A=
<DIV><FONT face=3DArial size=3D2>I have, until now, only had one program =
reading my rrd files</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>using rrdgraph.</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>=0A=
<DIV><FONT face=3DArial size=3D2>We are, in the future going to also use =
CGI to run rrtdump</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>on the rrd files.</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>=0A=
<DIV><FONT face=3DArial size=3D2>It is likely that the 2 processes will =
try to read the same</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>file at the same time =
(eventually)</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>=0A=
<DIV><FONT face=3DArial size=3D2>Do I need to worry about multiple =
readers? Do I need</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>to implement some sort of reader lock =
external to the</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>rrd tool processes?</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>Thanks</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>--</FONT></DIV>=0A=
<DIV><FONT face=3DArial size=3D2>jack</FONT></DIV></BODY></HTML>
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