Also, change the "rra.3" to 0-4 to get a different RRA... On Tue, Jul 27, 2010 at 17:30, Stevens, Weston J <[email protected]> wrote: > Alright thanks a bunch, using the shell script you provided me I think I'll > be able to grab this myself. You rock! > > -----Original Message----- > From: Stevens, Weston J > Sent: Tuesday, July 27, 2010 1:57 PM > To: 'Jesse Becker' > Cc: [email protected] > Subject: RE: [Ganglia-general] Parsing rrdtool dump output using Perl > > Correct, I want to be able to grab the last CDP timestamp of any RRA inside > an RRD. > > > All the best, > ***************************** > Weston J. Stevens > Intern - Student Engineer > Boeing Research & Technology > Enterprise Strategic Growth > W#: (253) 657-8689 > C#: (253) 432-0560 > ***************************** > > -----Original Message----- > From: Jesse Becker [mailto:[email protected]] > Sent: Tuesday, July 27, 2010 1:55 PM > To: Stevens, Weston J > Cc: [email protected] > Subject: Re: [Ganglia-general] Parsing rrdtool dump output using Perl > > The last_update command stores a timestamp when the rrdfile was modified (so > it should be very similar to the mtime of the file, under normal > circumstances). But you don't want this, you want the timestamp of the last > "slot" in the RRA, right? > > How about this: > > #!/bin/sh > > FILE=$1 > DURATION=$2 > > T=/tmp/rrd.$$ > > rrdtool info $FILE > $T > LAST=`awk '/last_update/{print $3}' $T` > ROWS=`awk '/rra.3..rows/{print $3}' $T` > PDP=`awk '/rra.3..pdp/{print $3}' $T` > STEP=`awk '/step/{print $3}' $T` > LENGTH=`echo "$PDP * $ROWS * $STEP" | bc ` > > > #echo $LAST $ROWS $PDP > > rrdtool fetch $FILE AVERAGE -s -$LENGTH | tail -n +3 > $T > > FIRST=`head -n 1 $T | sed 's/:.*//'` > LAST=`tail -n 1 $T | sed 's/:.*//'` > > echo $FIRST $LAST > > rm $T > > > > On Tue, Jul 27, 2010 at 16:14, Stevens, Weston J > <[email protected]> wrote: >> But say the last recorded CDP in the month RRA was a day ago, the >> last_update and the last timestamp would be separated by a day using that >> method. >> >> -----Original Message----- >> From: Jesse Becker [mailto:[email protected]] >> Sent: Tuesday, July 27, 2010 12:57 PM >> To: Stevens, Weston J >> Cc: [email protected] >> Subject: Re: [Ganglia-general] Parsing rrdtool dump output using Perl >> >> You could instead use rrdinfo to get the last_update timestamp. The >> starting timestamp for the "month" RRA can then be computed. Using the >> default RRA definitions, it should be something like: >> >> last_updated - 2459520 (=15*244*672) >> >> >> On Tue, Jul 27, 2010 at 15:32, Stevens, Weston J >> <[email protected]> wrote: >>> Say for default Ganglia for example I wanted to grab the first and last >>> timestamps for the month RRA so I can run a bounds check on begin/end time >>> inputs. Ideally I'd like to get all this information by simply specifying >>> the RRD granularity in seconds, without having to also specify the length >>> of the RRD to get the last timestamp in a command line. Using rrdtool dump, >>> what would be a good regex or anything else like Perl XML support that >>> could do this for me? Or a completely different and better way to do it? >>> >>> >>> >>> --------------------------------------------------------------------- >>> - >>> -------- The Palm PDK Hot Apps Program offers developers who use the >>> Plug-In Development Kit to bring their C/C++ apps to Palm for a share >>> of $1 Million in cash or HP Products. Visit us here for more details: >>> http://ad.doubleclick.net/clk;226879339;13503038;l? >>> http://clk.atdmt.com/CRS/go/247765532/direct/01/ >>> _______________________________________________ >>> Ganglia-general mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/ganglia-general >>> >> >> >> >> -- >> Jesse Becker >> Every cloud has a silver lining, except for the mushroom-shaped ones, which >> come lined with strontium-90. >> > > > > -- > Jesse Becker > Every cloud has a silver lining, except for the mushroom-shaped ones, which > come lined with strontium-90. >
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