We used to have that problem. Turns out the locking code in MRTG is somewhat iffy, and a second instance from cron was trying to write to the file while the previous instance was still running, causing the file to get corrupted/truncated.
I wrote a perl wrapper for MRTG that implements better file locking to prevent that from happening on our systems, and we haven't had a recurrance of it ever since. Matt ----- Original Message ---- From: Kevin Vlasich <[EMAIL PROTECTED]> To: [email protected] Sent: Tuesday, October 30, 2007 8:33:56 AM Subject: [mrtg] mrtg log losing data Hello, I recently setup mrtg to monitor firewall traffic, but am experiencing some difficulties. My problem: ----------------- My graphs seem to randomly lose all historical data at least once a day (no errors in the mrtg.log file). The corresponding mrtg-logfile shows all zeros except for the first few entries when this happens. Also, I noticed that my logfile goes missing on regular occasions and only the .old file remains. My setup: --------------- -Using mrtg version 2.15.1 on Fedora Core 7 -cronjob running every 5 minutes to pull data -used cfgmaker to produce my config file and made a few small changes (added WithPeak[_]: ymw, XSize[_]: 600, and YSize[_]: 200) I'm a new mrtg user, but I've scoured the FAQ and haven't found any resolutions to my problem. Any ideas on why I'm loosing data in the mrtg-logfile? Thanks! __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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