[rrd-users] rrdtutorial not working

[Tjerk.Kusters at imtech.nl]

Hi,

I tried it first with MS_ASYNC and that was not enough to make it work on
my system.

Regards,
Tjerk


-----rrd-users-bounces at lists.oetiker.ch wrote: -----

>To: Dan Cech <dcech at phpwerx.net>
>From: Tobias Oetiker <tobi at oetiker.ch>
>Sent by: rrd-users-bounces at lists.oetiker.ch
>Date: 07-09-2007 14:01
>cc: rrd-users at lists.oetiker.ch, rrd-developers at lists.oetiker.ch
>Subject: Re: [rrd-users] rrdtutorial not working
>
>Hi Dan,
>
>yes except that I don't think MS_SYNC is ideal it should rather be
>MS_ASYNC and have the OS decide when to sync ... or would this not
>suffice ?
>
>otoh, things will only work well once the architecture independent
>rrd file format is implemented ...
>
>cheers
>tobi
>
>
>> Tjerk.Kusters at imtech.nl wrote:
>> > 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. According

>> > 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?
>>
>> This is a very good point, and what seems like a simple solution.
>>
>> Support for working with rrds on an nfs mount would be a great thing in
>> several situations, especially if you have multiple collectors and/or
>> multiple front-end hosts all needing to access the same set of rrds.
>>
>> What are your thoughts Tobi?
>>
>> Dan
>>
>> _______________________________________________
>> rrd-users mailing list
>> rrd-users at lists.oetiker.ch
>> https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
>>
>>
>
>--
>Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
>http://it.oetiker.ch tobi@oetiker.ch ++41 62 213 9902
>
>_______________________________________________
>rrd-users mailing list
>rrd-users at lists.oetiker.ch
>https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
>
>