For users who are using RRDtool 1.3.x and have their RRD files over NFS, this post may be of interest to you.
Cheers, Bernard ---------- Forwarded message ---------- From: AJ Ragusa <[EMAIL PROTECTED]> Date: Mon, Nov 10, 2008 at 1:16 PM Subject: [rrd-developers] MSYNC issues To: [EMAIL PROTECTED] Hi Guys I have been using RRDTool 1.3.3 for a few months now without a problem, until one of my users noticed that on NFS mounts the rrdfiles were not updating.... after a full day of scratching my head and swearing about NFS I finally noticed that the last modified date of the files was not updating and was the cause of my NFS problems. Further investigation finally led me to this kernel bug http://bugzilla.kernel.org/show_bug.cgi?id=2645 I was slightly disheartened by one of the last posts ------- Comment #49 From Anton Salikhmetov 2008-01-23 15:10:11 [reply] ------- The patch applied to the upstream kernel fixes this bug. Closing. The remaining problem is to satisfy the paper standard requirement. This requirement is totally ambiguous and requires invasive changes and expensive code. This is the MS_ASYNC case of the msync() function. Googling shows that the msync() function is most probably not called with the MS_ASYNC flag by any popular application. Therefore, it is left unimplemented for now. --------------------------------------------------------------------------------------------------------------- After I looked through the RRDTool code I found that it is using the MS_ASYNC flag... since this problem was only recently resolved (only took 4 years) in January of 2008 I'm guessing that not a lot of kernels have this fix. Is it ok to change to MS_SYNC for the flag to msynch instead of MS_ASYNC? Or is that going to cause more problems? Has anyone else seen any problems related to this, and have a fix? Thanks A.J. Ragusa System Engineer - Global Research Network Operations Center _______________________________________________ rrd-developers mailing list [EMAIL PROTECTED] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-developers ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
