Re: [rrd-users] rrdtutorial not working

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Hi Tjerk,

I have done some more reading and found that there was a bug fixed
in kernel 2.6.12 which cause problems with mmap and nfs ...

what kernel are you using ?

cheers
tobi

>
>
>
>
>
> Hello Tobias,
>
> I read that there can be a problem when using mmap/munmap on NFS.
> On http://nfs.sourceforge.net/ there is a part over mmap and NFS. Accordi=
ng
> to the msync man page you should use msync before a munmap.
>
> I have add 2 msync function call in rrd_update.c and it looks to help.
>
> #ifdef HAVE_MMAP
> msync(rrd_mmaped_file, rrd_filesize,MS_SYNC);
> munmap(rrd_mmaped_file, rrd_filesize);
> #endif
>
> Is there a reason that you don't use a msync?
>
> best regards,
> Tjerk
>
>
>
> -----Tobias Oetiker <tobi@oetiker.ch> wrote: -----
>
> >To:=A0Tjerk.Kusters@imtech.nl
> >From:=A0Tobias=A0Oetiker=A0<tobi@oetiker.ch>
> >Date:=A007-09-2007=A011:42
> >cc:=A0rrd-users@lists.oetiker.ch
> >Subject:=A0Re:=A0[rrd-users]=A0rrdtutorial=A0not=A0working
> >
> >Hi=A0Tjerk,
> >
> >my=A0guess=A0is=A0that=A0the=A0'time'=A0on=A0your =A0vmware=A0host=A0is=
=A0not=A0correct=A0...
> >
> >cheers
> >tobi
> >
> >Today=A0Tjerk.Kusters@imtech.nl=A0wrote:
> >
> >>
> >>
> >>
> >>
> >>
> >>=A0Hello,
> >>
> >>=A0I=A0am=A0storing=A0the=A0rrd=A0files=A0on=A0a =A0nfs=A0mounted=A0file=
ssytem,=A0which=A0is=A0the=A0cause
>
> >>=A0of=A0the=A0problems.
> >>=A0Is=A0there=A0a=A0solution=A0to=A0this=A0probl em?
> >>
> >>=A0Regards,
> >>=A0Tjerk
> >>
> >>=A0-----rrd-users-bounces@lists.oetiker.ch=A0wrote:=A0-----
> >>
> >>=A0>To:=C2=A0rrd-users@lists.oetiker.ch
> >>=A0>From:=C2=A0Tjerk.Kusters@imtech.nl
> >>=A0>Sent=C2=A0by:=C2=A0rrd-users-bounces@lists.oetiker.ch
> >>=A0>Date:=C2=A005-09-2007=C2=A016:24
> >>=A0>Subject:=C2=A0[rrd-users]=C2=A0=C2=A0rrdtutorial=C2=A0not=C2=A0work=
ing
> >>=A0>
> >>=A0>
> >>=A0>
> >>=A0>
> >>=A0>
> >>=A0>
> >>=A0>Hello,
> >>=A0>
> >>
> >>I=C2=A0have=C2=A0a=C2=A0problem=C2=A0to=C2=A0get =C2=A0the=C2=A0example=
=C2=A0in=C2=A0the=C2=A0tutorial=C2=A0to=C2=A0work, =C2=A0at=C2
>
> >least=C2=A0on=C2=A0a
> >>
> >>Fedora=C2=A06=C2=A0Vmware=C2=A0machine=C2=A0it=C 2=A0is=C2=A0not=C2=A0wo=
rking.=C2=A0I=C2=A0am=C2=A0getting=C2=A0an=C2=A0em pty=C2
>
> >graph.=C2=A0The
> >>
> >>=A0>graph=C2=A0is=C2=A0oke=C2=A0when=C2=A0a=C2=A 0I=C2=A0run=C2=A0the=C2=
=A0same=C2=A0command's=C2=A0on=C2=A0Windows=C2=A0.
> >>=A0>
> >>=A0>Fedora:=C2=A0RRDtool=C2=A01.2.23=C2=A0(rrdto ol-1.2.23-6.fc6)
> >>=A0>Windows:=C2=A0RRDtool=C2=A01.2.23=C2=A0(bina ry=C2=A0from=C2=A0websi=
te)
> >>=A0>
> >>=A0>Looks=C2=A0like=C2=A0the=C2=A0samething=C2=A 0happens=C2=A0with=C2=
=A0a=C2=A0script=C2=A0I=C2=A0created...
> >>=A0>
> >>=A0>[root@master=C2=A0dp02]#=C2=A0rrdtool=C2=A0lastupdate=C2=A0sensorin=
fo.rrd
> >>=A0>=C2=A0cpufan=C2=A0cputemp=C2=A0mbtemp
> >>=A0>
> >>=A0>1189002120:=C2=A03351=C2=A041=C2=A033
> >>=A0>
> >>=A0>
> >>=A0>When=C2=A0I=C2=A0use=C2=A0this=C2=A0comman d:
> >>=A0>
> >>=A0>[root@master=C2=A0dp02]#=C2=A0rrdtool=C2=A0xport=C2=A0--start=C2=A0=
end-1h
> >>=A0>DEF:ds=3Dsensorinfo.rrd:cputemp:AVERAGE=C2=A 0XPORT:ds:mem
> >>=A0>
> >>=A0>I=C2=A0am=C2=A0getting:
> >>=A0>
> >>=A0><?xml=C2=A0version=3D"1.0"=C2=A0encoding=3D" ISO-8859-1"?>
> >>=A0>
> >>=A0><xport>
> >>=A0>=C2=A0=C2=A0<meta>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<start>1188998580</start>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<step>60</step>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<end>1189002180</end>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<rows>61</rows>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<columns>1</columns>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<legend>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<entry>m em</entry>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0</legend>
> >>=A0>=C2=A0=C2=A0</meta>
> >>=A0>=C2=A0=C2=A0<data>
> >>=A0>--cut--
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<row><t>1189001880 </t><v>NaN</v></row>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<row><t>1189001940 </t><v>NaN</v></row>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<row><t>1189002000 </t><v>NaN</v></row>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<row><t>1189002060 </t><v>NaN</v></row>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<row><t>1189002120 </t><v>NaN</v></row>
> >>=A0>=C2=A0=C2=A0=C2=A0=C2=A0<row><t>1189002180 </t><v>NaN</v></row>
> >>=A0>=C2=A0=C2=A0</data>
> >>=A0></xport>
> >>=A0>
> >>=A0>Any=C2=A0idea=C2=A0what=C2=A0the=C2=A0proble m=C2=A0can=C2=A0be?
> >>=A0>
> >>=A0>Regards,
> >>=A0>Tjerk
> >>=A0>
> >>=A0>____________________________________________ ___
> >>=A0>rrd-users=C2=A0mailing=C2=A0list
> >>=A0>rrd-users@lists.oetiker.ch
> >>=A0>https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
> >>=A0>
> >>=A0>
> >>
> >>=A0_____________________________________________ __
> >>=A0rrd-users=A0mailing=A0list
> >>=A0rrd-users@lists.oetiker.ch
> >>=A0https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
> >>
> >>
> >
> >--
> >Tobi=A0Oetiker,=A0OETIKER+PARTNER=A0AG,=A0Aarweg= A015=A0CH-4600=A0Olten
> >http://it.oetiker.ch=A0tobi@oetiker....2=A0213=A09902
> >
>
>

--=20
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi@oetiker.ch ++41 62 213 9902
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