X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=doc%2Frrdfetch.pod;h=7ebd9d603bb84dc0705f0c2a621fb6343b03be48;hb=62899aa21f4cc8029325c74d2d016d7554590ccb;hp=a6382b92692ad7c51373b1fc12b58e56903f5434;hpb=26f7c5c1ba83c8ab82cd271b143061f7fb13394c;p=rrdtool.git diff --git a/doc/rrdfetch.pod b/doc/rrdfetch.pod index a6382b9..7ebd9d6 100644 --- a/doc/rrdfetch.pod +++ b/doc/rrdfetch.pod @@ -4,10 +4,10 @@ rrdfetch - Fetch data from an RRD. =head1 SYNOPSIS -B B I I -S<[B<--resolution>|B<-r> I]> -S<[B<--start>|B<-s> I]> -S<[B<--end>|B<-e> I]> +B B I I +S<[B<--resolution>|B<-r> I]> +S<[B<--start>|B<-s> I]> +S<[B<--end>|B<-e> I]> =head1 DESCRIPTION @@ -20,11 +20,11 @@ function. =over 8 -=item I +=item I the name of the B you want to fetch the data from. -=item I +=item I the consolidation function that is applied to the data you want to fetch (AVERAGE,MIN,MAX,LAST) @@ -52,8 +52,8 @@ specify the end time. =head2 RESOLUTION INTERVAL -In order to get RRDtool to fetch anything other than the finest resolution RRA -B the start and end time must be specified on boundaries that are +In order to get RRDtool to fetch anything other than the finest resolution RRA +B the start and end time must be specified on boundaries that are multiples of the desired resolution. Consider the following example: rrdtool create subdata.rrd -s 10 DS:ds0:GAUGE:300:0:U \ @@ -92,10 +92,10 @@ both start and end time are within the desired RRA =back -So, if time now is called "t", do +So, if time now is called "t", do end time == int(t/900)*900, - start time == end time - 1hour, + start time == end time - 1hour, resolution == 900. Using the bash shell, this could look be: