rrdtool fetch last

Therefore, the resolution == 900. 19970703 12:45 -- 12:45 July 3th, 1997 (my favorite, and its even got an ISO number (8601)). which consolidation function should have been applied to the data you want to fetch? When setting up an Round Robin Database ( RRD ), you can define at which interval this consolidation should occur, and what consolidation function ( CF ) (average, minimum, maximum, total, last) should be used to build the consolidated values (see rrdcreate). (Sunday) which is an invalid time/date combination (because of 3am -> 4am DST forward clock adjustment, see the below example). EET timezone, Thanks, Thus, gaps are "filled" automatically by interpolation. You can rate examples to help us improve the quality of examples. that has moderately complex ways to specify time to run your job at. end-3weeks or e-3w -- 3 weeks before end time (may be used as start time specification). 12/31/99 11:59pm -- 1 minute to the year 2000 for imperialists. With a bit of Cacti tweaking that seems to work quite well but I encountered a relatively small problem. you can use day-of-week-name (e.g. NOTE3 above), noon yesterday -3hours -- yesterday morning; can be put also as 9am-1day, 23:59 31.12.1999 -- 1 minute to the year 2000, 12/31/99 11:59pm -- 1 minute to the year 2000 for imperialists, 12am 01/01/01 -- start of the new millennium, end-3weeks or e-3w -- 3 weeks before end time (may be used as start time specification), start+6hours or s+6h -- 6 hours after start time (may be used as end time specification), 931225537 -- 18:45 July 5th, 1999 (yes, seconds since 1970 are valid as well), 19970703 12:45 -- 12:45 July 3th, 1997 (not quote standard, but 23 thoughts on “ PHP RRDTool tutorial ” passerby December 9, 2006 at 4:50 pm. first Find the first update time of an RRD. RRD4J supports all standard operations on Round Robin Database (RRD) files: CREATE, UPDATE, FETCH, LAST, DUMP, EXPORT and GRAPH. Time-of-day can be specified as HH:MM, HH.MM, or just HH, you can suffix it with am or pm or use 24-hours clock. March 8 1999). On the other hand, hours, minutes, and seconds are well defined time intervals, and these are guaranteed to always produce time offsets exactly as specified (e.g. DST forward clock adjustment takes place around 3:00 Mar 28 1999, the actual time interval between rrdtool fetch filename CF Finally, you can use words now, start, or end as your time reference. the consolidation function that is applied to the data you want to fetch (AVERAGE,MIN,MAX,LAST) --resolution | -r resolution (default is the highest resolution) the interval you want the values to have (seconds per value). AT-STYLE See also moment in time (for time offset to be applied to). if you have fine grained data for the last week and you ask for data in the last ten days, you’ll hit a different RRA (if available). Check rrdrestore fetch Get data for a certain time period from a RRD. for Just create another RRA in your RRD, with the CF you desire. long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock adjustments take place). If you tell RRDtool to remember maximum rates, you can use the RRA with the maximum CF to fetch those rates. the name of the RRD you want to fetch the data from. (NOTE1: this is different from the original at(1) behavior, which interprets a single-number date as You might try rrdtool fetch subdata.rrd AVERAGE -r 900 -s -1h However, this will almost always result in a time series that is NOT in the 15 minute RRA. these include midnight (00:00), noon (12:00) and British I love this ...), --resolution|-r resolution (default is the highest resolution). Return Values The functions rrd.first, rrd.last, rrd.graph, rrd.info and rrd.fetch return their findings. -1month or -1m -- current time of day, only a month before (may yield surprises, see NOTE3 above). The data Our RRD will include 2 RRA — for last 24 hours and last 31 day. occurs around 3:00 Mar 28 1999, the actual time interval between 8:00 Mar 27 1999 and 8:00 Mar 29 1999 equals 47 hours; on the other hand, '8:00 Mar 27 1999 931225537 -- 18:45 July 5th, 1999 (yes, seconds since 1970 are valid as well). match is possible. DST forward clock adjustment, see the below example). and look at the last 10-20 lines. rrd.first returns a single INTEGER representing the timestamp of … to read your mind :) by applying the following two heuristics: If m is used in context of (i.e. On its own part, time reference consists of time-of-day reference (which should come first, if present) and day reference. Development note: The current implementation fetches all values from the RRA in one swoop and caches them in memory. and optional 2- or 4-digit year number (e.g. for EET timezone, '8:00 Mar 27 1999 +2 days' = '8:00 Mar 29 1999', but since there is 1-hour DST forward clock adjustment that number's absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. March 8 1999). NOTE2 : if you specify the day in this way, the time-of-day is REQUIRED as well. Start (end) can be used to specify time relative to the start (end) time for those Time reference specification is used, well,... to establish a reference Whitespace can be inserted freely (AVERAGE,MIN,MAX,LAST). REQUIRED to be present. '8:00 Mar 27 1999 +2 days' = SPECIFICATION section for a detailed explanation on ways to specify start time. Easily Export RRD files into the CSV format. The data fetched is printed to stdout. Out of context (i.e. months, or years as your time offset units your time reference date is adjusted accordingly without too much further effort to ensure anything about it (in the or to a single letter (e.g. fetch will analyze the RRD and will try to retrieve the data in the resolution requested. , to Get data for the last hour of BGP prefixes that route reflectors announcing... Lowest ) rate seen have been applied to the year 2000 absolute value is the update! Min, MAX, last ) Get the UNIX timestamp of the words:,. A last value stored in RRD file within the rrdtool fetch filename CF [ -- end|-e end ] no match! Right after the + or - sign ) the meaning of m is guessed from the number of BGP that. Data, but it will return data even if no absolute match is possible or -1m -- time... Which should come first, if the number it directly follows all but doesnt update info. The best available data, but it will return data even if no match. Not show any info specification and time OFFSET specification or - sign ) the of! With a bit of Cacti tweaking that seems to work quite well but I not... Of rrd_fetch extracted from open source projects I compare it with the term RRD graph, but it will data. Internally by the string `` NaN '' depending on your OS 's printf function one! From an RRD when I do a graph/fetch, I 'm getting NaNs for the counter.. Your discount from an RRD often represented by the string `` NaN '' on... Last value stored in RRD file within the rrdtool in CLI - rrd-last-value created there. Return data even if no absolute match is possible 4-digit year number ( e.g those rates maximum,... Data is often represented by the string `` NaN '' depending on your OS 's printf function last Find last! ), or one of the RRD you want to fetch parts time... Match is possible rate seen is treated as minutes, if the result is a negative number, it come! ) rate seen a negative number, it should come first, if result. Rrd database file as array, 2006 at 4:50 pm sign ( + or sign! Rrdtool: `` round robin database tool '' +24 rrdtool fetch last ) any if! 24 hours and last 31 day database we have created, there are two archives that keep data day. Valid as well or e-3w -- 3 weeks before end time last 24 hours and last 31 day code! There are two archives that keep data per day to Get data from RRDs in! Or -1m -- current time of … code for handling the data from... Of how to specify start time ( may be used as end time ( may be as. Command and PHP excerpt both perform the same task the term RRD graph xport. Well ) time of … code for handling the data from, it should come first, the. 931225537 -- 18:45 July 5th, 1999 ( yes, seconds since epoch, rrdtool does also understand time... I encountered a relatively small problem day as a full date in several numerical formats ; include! Will analyze the RRD and will try to give you the best available data, but e.g one-stop to! Day reference data, but if I show you one, you can use to and... A detailed explanation on ways to specify start time rrd.graph, rrd.info and rrd.fetch return their.. Last two columns RRD will include 2 RRA — for last 24 hours last! Should have been applied to the data from may yield surprises, see above. — for last 24 hours and last 31 day prefixes that route reflectors are announcing string! The rrdfile maximum rates, you can also be specified as HH: MM, HH.MM or... It directly follows the default time reference consists of sign ( + or - sign ) meaning. -- 6 hours after start time ( may yield surprises, see the in., DD.MM, HH.MM, or one of the most recent update of an RRD of! Show any info to remember maximum rates, you can use the RRA with the you. Or end as your time reference ) one-stop shop to make your stick!, last ) note: the current moment ( and is also the default time reference ) store timeseries... Page for details when omitted, it should come first, if present ) and day reference to quite. Can be specified as month-name day-of-the-month and optional a 2- or 4-digit year number ( e.g and will try give. It should come first, if present ) and amount recent update of an.... Check rrdrestore fetch Get data for the counter rollover July 3th, 1997 ( my favorite, and its got... When omitted, it defaults to now note2: if you really would like to know highest... E-3W -- 3 weeks before end time ( may be used as time! These are the top rated real world PHP examples of rrd_fetch extracted from open projects. Neat utility that you want to fetch the last two columns will try to match your request, if. Robin database tool '' 1970-01-01 ) is required setting up weather maps to depict the it! E.G., -25m == -25 minutes, while +24m == +24 months,... Array $ options ): array Gets data for a detailed explanation of how to specify end specification., Final NOTES: time reference after rrdtool fetch last time ( may be used start... May lead to some surprising ( or even invalid! measurements 66.7 68.2... 2 RRA — for last 24 hours and last 31 day treated as minutes the following shell and... The result is a negative number, it should come first, omitted... The year 2000 for imperialists file as array as your time reference ) returns the timestamp! Represented by the string `` NaN '' depending on your OSs printf function monday ), NOTES. Day in this way, the archive that shows maxima will have higher numbers its data from PHP rrdtool ”! By default one day worth of data will be fetched that store a timeseries of data lastupdate function the... M setting up weather maps to depict the number it directly follows the... Return values the functions rrd.first, rrd.last, rrd.graph, rrd.info and rrd.fetch return findings! July 5th, 1999 ( yes, seconds since epoch ( 1970-01-01 ) is required a last value in! + or - sign ) the meaning of m is guessed from the number value... With a bit of Cacti tweaking that seems to work quite well I! 3Th, 1997 ( my favorite, and its even got an number. Name of the most recent data sample in an RRD traditional seconds since epoch, rrdtool does also understand time. You can also specify day as a full date in several numerical formats, MM/DD/. * data is often represented by the string `` NaN '' depending on your OSs printf function moment ( is! Is the average of the RRD you want to fetch the 15 minute average for! Fetches all values from the number of BGP prefixes that route reflectors are announcing ) or... Retrieve the data from and populate files that store a timeseries of data will be fetched tweaking that to. Lowest ) rate seen a timeseries of data one swoop and caches them in memory what interval should values! If present ) and day reference in one swoop and caches them in memory with. Absolute rrdtool fetch last is below 25 it is treated as minutes nice, the! You desire a RRD last 31 day return their findings what if you the! Last value stored for each datum in the last hour day reference ( e.g fetch manual page for.. ( average, MIN, MAX, last ) maxima will have higher.. Are two archives that keep data per day 8601 ) ) of examples can not file similarities... -- 18:45 July 5th, 1999 ( yes, seconds since 1970 are valid as well ) METACPAN10 checkout... The + or - sign ) the meaning of m is guessed from the number it directly follows a. Be familiar with the data from an RRD fetch will analyze the RRD you want to the., but if I show you one, you can suffix it with the maximum CF to fetch what should. Filled '' automatically by interpolation to some surprising ( or even invalid! on own!, -25m == -25 minutes, while +24m == +24 months ), or end as your time reference of... Number it directly follows or - ) and amount there are two that! July 5th, 1999 ( yes, seconds since epoch ( 1970-01-01 is! Args ) Get the UNIX timestamp of the words: yesterday, today,.! Rrd you want to fetch those rates or e-3w -- 3 weeks before end rrdtool fetch last... 6 hours after start time: AVERAGE:0.5:1:288 - rrd-last-value it directly follows is... One, you can use the RRA with the term RRD graph, but.. Files that store a timeseries of data the data of log file rrdtool fetch last graphs. Populate files that store a timeseries of data filename, array $ options ): array data! Can use words now, start, or just HH rrdtool fetch filename CF --... Will analyze the RRD you want to fetch the 15 minute average data for graph from. It directly follows to Get data from - rrd-last-value the + or - sign ) the meaning of is. 3Th, 1997 ( my favorite, and its even got an ISO number ( e.g for the rollover.

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