James Wade wrote:
I've modified the old larrd bb-iostat.sh script to send iostat information to Hobbit so that I could graph busy and wait states of disks, and it works great.
- I have several NFS & Hard Mounts that I'm checking busy and wait states for. A lot of them get NaN's because the busy and wait states are 0, zero.
NaN means no data, not zero. If the busy/wait states are 0, the graphs should show zero as well. Sounds like your RRD files aren't being updated each time. Have you changed or reordered the output format of your script since you started sending the data into your hobbit server? If so, you will need to delete the rrd files on the hobbit server for the iostat tests and let Hobbit recreate them. RRD does not allow you to change the data format on the fly like that.
I can tell it to only graph something that is greater than a number, but I would prefer that it did not list the filesystem(s) that have NaN's below the graph. Can this be done?
What if the filesystems are 0 instead of NaN? Is that OK? If so, fixing the RRD issue mention above will take care of that.
- Also, when graphing a lot of data, you get all the colors, but it becomes difficult to figure out which one belongs to which data. Is there a way to have rrd give you the datapoint information when you move the cursor over it? ie, I put the cursor over a line, and it says, /export/home, and gives me the numbers.
I doubt it, but I'm not an rrd expert so I don't know for sure. It'd be a cool feature.
Tom Georgoulias Systems Engineer McClatchy Interactive