Michael Wells wrote: > > I'm finding that when I reboot, the graphs I get are fouled up. An > example of what the graph looks like before and after reboot is here: > > http://www.wells.org.uk/rrdtools/before.png > http://www.wells.org.uk/rrdtools/after.png
I need to download these files and rename them to *.gif before I'm able to view them. Did you forget to use '--img-format PNG' ? > rrdtool create rl0.rrd \ > DS:input:COUNTER:3600:U:U \ > DS:output:COUNTER:3600:U:U \ Unlimited counters... so indeed, a reboot results in the counter being reset to zero. If the front end doesn't check the uptime of the counter, it will be processed as a wrap. If the current counter value is below the last-seen counter value then the difference (which is negative) should be incremented with 2**32. If it is below zero thereafter, increment with (2^64 - 2^32) In most cases, 2^32 will have been added. This is 4294967296 bytes which are assumed to have passed the interface somewhere between the previous update and the current one. You write you update every few minutes. However, your RRD is using 300 second intervals. To get the resulting numbers (about 12MBps and about 26MBps) you have to have been updating every three minutes if I'm not mistaking. I also suspect you booted (at least) twice around 18:00 How to solve the problem and the resulting problem: 1) Your front end should check wraps. If it is not a real wrap or if it is not sure to be a wrap, update with "U" instead. 2) If (1) is not possible or not feaseble, set proper limits on the DS. For 10Mbps ethernet this should read "...3600:0:1250000" 3) dump, edit and restore the RRD to get rid of the spike. Search for "2\.6.........e+06" (where \. means a decimal point and . means a character wildcard) in the .xml file. I think there is a script to do (3) but you really want to have a look in such an xml file at least once before automating it. cheers, -- __________________________________________________________________ / [EMAIL PROTECTED] [EMAIL PROTECTED] \ | work private | | My employer is capable of speaking therefore I speak only for myself | +----------------------------------------------------------------------+ | Technical questions sent directly to me will be nuked. Use the list. | +----------------------------------------------------------------------+ | http://faq.mrtg.org/ | | http://rrdtool.eu.org --> tutorial | +----------------------------------------------------------------------+ -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
