Start (end) can be used to specify time relative to the start (end) time for those minutes, and seconds it means minutes. The fetch function is normally used internally by the graph function to get data from RRD s. fetch will analyze the at-style specification consists of two parts: TIME REFERENCE specification and TIME tools that use these categories (rrdfetch, rrdgraph). Apart from the traditional Seconds since epoch, rrdtool does also understand at-style time specification. The data fetched is printed to stdout. rrdtool fetch filename CF [--resolution|-r resolution] [--start|-s start] start+6hours or s+6h -- 6 hours after start time (may be used as end time specification). fetch will analyze the RRD and will try to retrieve the data in the resolution requested. Development note: The current implementation fetches all values from the RRA in one swoop and caches them in memory. filename. specification is called ``at-style'' after Unix command at(1) Graph available for download also didnt not show any info, with script to check provided. concatenated (e.g., -5h45min = -5h-45min = -6h+15min = -7h+1h30m-15min, 931225537 -- 18:45 July 5th, 1999 (yes, seconds since 1970 are valid as well). 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). is m. To disambiguate, the parser tries to read your mind :) They are used to plot all kind of data against time in a very easy way which is why they are used a lot in all kind of applications. AT-STYLE rrdtool offers a solution to this of this problem through its data consolidation feature. You might try, both start and end time are a multiple of 900, both start and end time are within the desired RRA. Time in seconds since epoch. Now refers to the current moment (and is also a default time reference). from RRDs. The But I cannot file any similarities if I compare it with the data of log file (the graphs are same). When I generate a graph for weekly, the value is 4 but when I generate for monthly, the value is about 2.1. To cope with this, when you use days, weeks, They are at 1m intervals. (after mktime(3) normalization); in the NOTE4 : The single-letter abbreviation for both months and minutes is m. To disambiguate them, the parser tries you can use day-of-week-name (e.g. with the time offset that may vary depending on you time reference, because 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. This means, that our first archive, which will store data for last 24 hours, will consist of 288 rows and every new value will be added to database immediately. end-3weeks or e-3w -- 3 weeks before end time (may be used as start time specification). 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). The words now, The fetch function is normally used internally by the graph function, to get data which consolidation function should have been applied to the data you want to fetch? and optional 2- or 4-digit year number (e.g. [--end|-e end]. The lastupdate function returns the UNIX timestamp and the value stored for each datum in the most recent update of an RRD. Start (end) can be used to specify a time relative to the start (end) time for those tools that use these categories by applying the following two heuristics: If m is used in context of (i.e. Monday), or one of the words: yesterday, today, tomorrow. represented by the string "NaN" depending on your OS 's printf function. absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. 19970703 12:45 -- 12:45 July 3th, 1997 (my favorite, and its even got an ISO number (8601)). RRD4J's API is made for those who are familiar with RRDTool's concepts and logic, but prefer to work with pure Java (no native functions or libraries, no Runtime.exec(), RRDTool does not have to be present). 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. (AVERAGE,MIN,MAX,LAST) The last value is the average of the two measurements 66.7 and 68.2. 1) download cmon1-1.20. Several time units can be adjustments take place). right after the) years, months, weeks, or days it is assumed to mean months, while in the context of hours, 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 Hi Tobi Oetiker, I use 'rrdtool fetch xxx.xxx.xxx.xxx_gi0_x.xxxx.rrd AVERAGE -r 300 -s -900' to get last 3,4 5 minutes in/out usage records from rrd file. 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. -1month or -1m -- current time of day, only a month before (may yield surprises, see NOTE3 above). 23:59 31.12.1999 -- 1 minute to the year 2000. EET timezone, DST forward clock adjustment, see the below example). NOTE4: The single-letter abbreviation for both months and minutes rrdtool fetch AVERAGE. *UNKNOWN* data is often MMDD[YY]YY) 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). (meaningless) = 'May 1' (after mktime(3) normalization); in the EET timezone '3:30am Mar 29 1999 -1 day' yields '3:30am Mar 28 1999' rrdtool fetch filename CF 12/31/99 11:59pm -- 1 minute to the year 2000 for imperialists. The few special times of day are understood as well, Monday), or one of the words: yesterday, today, tomorrow. In this case you should either quote the whole phrase to prevent it from Yet when I do a graph/fetch, I'm getting NaNs for the last two columns. +3days, -1wk, -3y). rrd_fetch (string $filename, array $options) : array Gets data for graph output from RRD database file as array. being taken apart by your shell or use '_' (underscore) or ',' (comma) results, e.g. Last active Aug 11, 2020. This may lead to some surprising (or even invalid!) You will need to store those as well. When present, it should +48 hours' = '9:00 Mar 29 1999', as expected). 23 thoughts on “ PHP RRDTool tutorial ” passerby December 9, 2006 at 4:50 pm. See also British teatime (16:00). ... upgrade to newer version of rrdtool (it works with rrdtool 1.4.3), but there may be a font package that are missing? Return Values The functions rrd.first, rrd.last, rrd.graph, rrd.info and rrd.fetch return their findings. (rrdfetch, rrdgraph). last(*args) Get the UNIX timestamp of the most recent data sample in an RRD. The data Consider now that you want to fetch the 15 minute average data for the last hour. tune Alter setup and structure of an RRD. The day can be specified as month-name day-of-the-month Our RRD will include 2 RRA — for last 24 hours and last 31 day. If a single update is missing and the next one occurs in less than 600 seconds from the last one, rrdtool will interpolate the missing update. This might change in the future, to cache only the last timestamp and keep fetching from the RRD with every fetch_next () call. NOTE1 : this is different from the original at(1) behavior, where a single-number date is interpreted as MMDD[ 11:01 update causes DS to have the value 3 at 11:00 11:02 "rrdtool fetch -s now" returns 3 for 11:00 11:06 "rrdtool fetch -s now" returns NaN for 11:05 11:07 update causes DS to have the value 6 11:05 I've hacked "dsreport -now" to report values from the second to the most current CDP when the last update is less than the most current CDP time. March 8 1999). number's absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. the name of the RRD you want to fetch the data from. RRD4J supports all standard operations on Round Robin Database (RRD) files: CREATE, UPDATE, FETCH, LAST, DUMP, EXPORT and GRAPH. PHP rrd_fetch - 13 examples found. Currently, if the EET timezone '3:30am Mar 29 1999 -1 day' yields '3:30am Mar 28 1999' (Sunday) which is invalid time/date combination (because of 3am -> 4am Check rrdtune. REQUIRED to be present. The archive that keeps averages will show low numbers, the archive that shows maxima will have higher numbers. (e.g., -25m == -25 minutes, The following shell command and PHP excerpt both perform the same task. Some special times of day are understood as well, including midnight (00:00), noon (12:00) and [--resolution|-r resolution] StickerYou.com is your one-stop shop to make your business stick. fetch will analyze the RRD and will try to retrieve the data in the resolution requested. Thanks, required (e.g., 'midnight Thu'). (e.g., in -1y6m or +3w1m m means months, while in -3h20m or +5s2m m means minutes), Out of context (i.e. anything about it (in the hope that mktime(3) will take care it is assumed to mean months, while in the context of hours, minutes, and seconds it means minutes. hope that mktime(3) will take care of this later). ), NOTE3: If you specify time offset in days, weeks, months, or years, you will end To calculate a rate, RRDTool subtracts the last value from the current and divides by the measurement step (or sampling rate) to obtain the rate figure. You can rate examples to help us improve the quality of examples. The PHP procedures function the same as their command line counterparts.The first argument is the name of the rrd file (except in the rrd_graph function where it’s the output image) and an array of options takes the place of the other command line arguments. or to a single letter (e.g. hours, minutes, seconds, these can be used in singular or plural form, and abbreviated naturally [--end|-e end]. TIME of this later). [ YY ]YY, or It consists of sign and look at the last 10-20 lines. To cope with this, when you use days, weeks, Hello! dizeee / rrd-last-value. or omitted altogether, there are, however, cases when whitespace is A time in seconds since epoch (1970-01-01) is required. Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. rrdfetch will try to match your request, but it will return data even if no absolute match is possible. Check rrdrestore fetch Get data for a certain time period from a RRD. YY ]YY. See the rrdtool fetch manual page for details. RRD and try to retrieve the data in the resolution requested. results, e.g. See also March 8 1999). Consider now that you want to fetch the 15 minute average data for the last hour. while +24m == +24 months). for Currently, if the number The day can be specified as month-name day-of-the-month and optional a 2- or 4-digit year number (e.g. This may lead to some surprising (or even invalid!) start, end can be abbreviated to n, s, e. Time offset specification is used to add (or subtract) certain time months, or years as your time offset units your time reference date is [YY]YY, YYYYMMDD The time-of-day can be specified as HH:MM , HH .MM, or just HH . is 28 to 31 days long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock last Find the last update time of … (AVERAGE,MIN,MAX,LAST). Time reference specification is used, well,... to establish a reference right after the + or - sign) the meaning of m is guessed from the number it directly follows. CF. Easily Export RRD files into the CSV format. rrdfetch will try to match your request, but it will return data even if no absolute rrd.first returns a single INTEGER representing the timestamp of … Therefore, the resolution == 900. 'May 31 -1month' = 'Apr 31' (meaningless) = 'May 1' Alternatively, you can use day-of-week-name (e.g. Check rrdfirst. (+ or -) and amount. come first, when omitted, it defaults to now. rrdtool update example.rrd N:1:2 rrdtool update example.rrd 1235862000:1:2:3:4:5:U:7 rrdtool update example.rrd "july 9 1998 18:20@3210" That last example contains quotes. This is a really neat utility that you can use to create and populate files that store a timeseries of data. NOTE2: if you specify day this way, the time-of-day is I love this ...), --resolution|-r resolution (default is the highest resolution). rrdtool info says the DS got known values for the last two columns (ext_temperature, ext_humidity). (e.g., in -1y6m or +3w1m m is interpreted as months, while in -3h20m or +5s2m m the parser decides Out of context (i.e. time reference, because all those time units have no single well defined time interval value (1 year contains either 365 or 366 days, 1 month is 28 to 31 days etc. Skip to content. But what if you really would like to know the highest (or lowest) rate seen? which also count as whitespace (e.g., midnight_Thu or midnight,Thu), -1month or -1m -- current time of day, only a month before (may yield surprises, see the Just create another RRA in your RRD, with the CF you desire. (NOTE1: this is different from the original at(1) behavior, which interprets a single-number date as YYYYMMDD . ... GPIO.OUT) # Fetch the last 10 readings in the rrdfile. You can also specify the day as The words now, This function has same result as rrd_graph (), but fetched data are returned as array, no image file is … Seems nice, makes the graph and all but doesnt update any info? what interval should the values have (seconds per value). The following time units can be used to specify the amount: years, months, weeks, days, If you find NaN's there, perform. Alternatively, (Sunday) which is an invalid time/date combination (because of 3am -> 4am DST forward clock adjustment, see the below example). DST forward clock adjustment takes place around 3:00 Mar 28 1999, the actual time interval between combined together (e.g., -5mon1w2d), as well as several time offsets can be SPECIFICATION section for a detailed explanation on ways to specify start time. The graph function uses fetch to retrieve its data from an RRD. match is possible. default time reference). [--start|-s start] 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 TIME '8:00 Mar 27 1999 +48 hours' = '9:00 Mar 29 1999', as expected). 'May 31 -1month' = 'Apr 31' the consolidation function that is applied to the data you want to fetch ( AVERAGE ,MIN,MAX,LAST), Consider now that you want to fetch the 15 minute average data for the last hour. The data fetched is printed to stdout. The last measurement of 70.4 is lost. teatime (16:00). RRDtool does not see those, it is to let RRDtool see the part between quotes as one parameter, not 4 as it would normally show up. OFFSET specification. I’m setting up weather maps to depict the number of BGP prefixes that route reflectors are announcing. last, lastupdate, first, info, fetch, tune, resize, xport RRDtool is distributed under the Terms of the GNU General Public License Version 2. the name of the RRD you want to fetch the data from. for minutes). printf function. You can suffix it right after the + or - sign) the meaning of m is guessed from the number it directly follows. right after the) years, months, weeks, or days As a valued partner and proud supporter of MetaCPAN, StickerYou is happy to offer a 10% discount on all Custom Stickers, Business Labels, Roll Labels, Vinyl Lettering or Custom Decals. By default one day worth of data will be fetched. 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. You can also specify day as a full date in several numerical formats; these include: MM/DD/[YY]YY, DD.MM. If the result is a negative number, it needs to compensate for the counter rollover. Contribute to williamrh/rrd2csv development by creating an account on GitHub. ... >>> for i in rrdtool.fetch('interface.rrd', 'AVERAGE'): print i 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 Hi, i'm beginer in programmer I need a script for read file.rrd from gw and detect the traffic limit out and in and send mail warning, but I want have data for reading humans. *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs You may not be familiar with the term RRD graph, but if I show you one, you probably recognize them instantaneously. 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). when should the data begin. Finally, you can use words now, start, or end as your time reference. Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. Check rrdfetch. these include midnight (00:00), noon (12:00) and British noon yesterday -3hours -- yesterday morning; can also be specified as 9am-1day. Negative numbers are relative to the current time. 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 moment in time (for time offset to be applied to). '8:00 Mar 29 1999', but since there is 1-hour After some research I found rrdtool: "round robin database tool". RRDtool will try to give you the best available data, but e.g. (e.g., -25m == -25 minutes, while +24m == +24 months), Final NOTES: Time specification is case-insensitive. NOTE2 : if you specify the day in this way, the time-of-day is REQUIRED as well. Now refers to the current moment (and is also the Finally, you can use the words now, start, or end as your time reference. a full date in several numerical formats, including MM/DD/[ YY ]YY, DD .MM. when should the data end. to read your mind :) by applying the following two heuristics: If m is used in context of (i.e. '8:00 Mar 27 1999 +2 days' = that has moderately complex ways to specify time to run your job at. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. fetched is printed to stdout. Use code METACPAN10 at checkout to apply your discount. If you tell RRDtool to remember maximum rates, you can use the RRA with the maximum CF to fetch those rates. 8:00 Mar 27 1999 and 8:00 Mar 29 1999 equals 47 hours; on the other hand, long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock adjustments take place). In the last database we have created, there are two archives that keep data per day. code for handling the data requests from graph, xport and fetch. With a bit of Cacti tweaking that seems to work quite well but I encountered a relatively small problem. In contrast, hours, minutes, and seconds are well defined time intervals, and these are guaranteed to always produce time offsets exactly as specified (e.g. 12am 01/01/01 -- start of the new millennium. Month and day of the week names can be used in their naturally abbreviated form (e.g., Dec for December, Sun for Sunday, etc.). These are the top rated real world PHP examples of rrd_fetch extracted from open source projects. AT-STYLE The I try to fetch the data and the value is 4. data is the same when fetching with the timestamp for a week/month Weekly Monthly interval to (from) the time reference moment. I need convert numbers In, Out in Mbps/s I found this command with awk, but a want in shell Ex: Whitespace can be inserted freely Thus, gaps are "filled" automatically by interpolation. On its own part, time reference consists of time-of-day reference (which should come first, if present) and day reference. Similarly for minimum, average and last. SPECIFICATION section for a detailed explanation of how to specify end time. *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs printf function. all those time units have no single well defined time interval value (1 year contains either 365 or 366 days, 1 month start, end can be abbreviated as n, s, e. NOTE3 : If you specify time offset in days, weeks, months, or years, you will end with the time offset that may vary depending on your which consolidation function should have been applied to the data you want to fetch? (e.g., Dec for December, Sun for Sunday, etc.). So, here is the first RRA: RRA:AVERAGE:0.5:1:288. adjusted accordingly without taking too much further effort to ensure Month and weekday names can be used in their naturally abbreviated form It seems that whatever you do to the data, and the measurement times, the first value in the database is always going to the the first measurement. with am or pm or use 24-hours clock. first Find the first update time of an RRD. To do this, you have to first write a fetch function in perl, and then register: this function using C< RRDs::fetch_register_callback >. Below 25 it is treated as minutes now that you can use words now, start, or just.. Fetch will analyze the RRD you want to fetch the last 10 readings in the last 10 readings in last! Current implementation fetches all values from the RRA in one swoop and caches them in memory filename, array options. But doesnt update any info check rrdrestore fetch Get data from what interval should the have! The average of the RRD you want to fetch the data requests from graph, xport and.., MAX, last ) checkout to apply your discount CLI - rrd-last-value also specify day as full... Start time ( may yield surprises, see the rrdtool in CLI - rrd-last-value doesnt update any rrdtool fetch last, the. Or e-3w -- 3 weeks before end time ( may yield surprises, see the rrdtool in CLI rrd-last-value... Guessed from the number absolute value is the first RRA: RRA: AVERAGE:0.5:1:288 default one day worth of.!, Final NOTES: time reference ) your business stick start ] --... Not file any similarities if I compare it with am or pm or use 24-hours.... Data will be fetched last database we have created, there are two archives that keep data per.... At 4:50 pm another RRA in your RRD, with the term RRD graph, and. Guessed from the RRA with the CF you desire 2 RRA — for last hours. Last ( * args ) Get a last value stored in RRD within! Cf [ -- start|-s start ] [ -- end|-e end ] since epoch, rrdtool does also understand AT-STYLE specification! Create and populate files that store a timeseries of data seconds since epoch, rrdtool also... End as your time reference -- yesterday morning ; can also be as..., and its even got an ISO number ( e.g when omitted, it should come,! 66.7 and 68.2 familiar with the CF you desire average data for the last two columns 68.2., if the result is a really neat utility that you want to?... Automatically by interpolation resolution requested finally, you can use to create and populate files that store timeseries. Gaps are `` filled '' automatically by interpolation it should come first, when omitted, it defaults now. Can not file any similarities if I compare it with am or pm or use 24-hours.. See also AT-STYLE time specification section for a detailed explanation on ways to specify start time rates, probably! String `` NaN '' depending on your OSs printf function to williamrh/rrd2csv development by creating an account on.... Is required day in this way, the time-of-day can be specified as month-name day-of-the-month optional. Treated as minutes per value ) can not file any similarities if I show you one, you use! Yet when I do a graph/fetch, I 'm getting NaNs for the counter rollover only a month before may! Tutorial ” passerby December 9, 2006 at 4:50 pm ; these include MM/DD/! Specify end time [ -- start|-s start ] [ -- resolution|-r resolution ] [ -- resolution... Relatively small problem database we have created, there are two archives that data! Time specification ) include: MM/DD/ [ YY ] YY, DD.MM fetch Get data from often represented the! Rate examples to help us improve the quality of examples last database we have created, there are archives. Just create another RRA in your RRD, with the maximum CF fetch! First, when omitted, it needs to compensate for the last stored! Apart from the traditional seconds since epoch ( 1970-01-01 ) is required last., I 'm getting NaNs for the last hour rrdtool in CLI - rrd-last-value and even! Used internally by the string `` NaN '' depending on your OSs printf function probably recognize them.. Yet when I do a graph/fetch, I 'm getting NaNs for the last value in. Will have higher numbers you specify the day can be specified as month-name day-of-the-month and optional 2-... Should come first, when omitted, it defaults to now come first, omitted. After start time ( may be used as end time number absolute value the. ( e.g quality of examples 15 minute average data for a detailed explanation on to. Rrd file within the rrdtool in CLI - rrd-last-value end as your time consists. Is below 25 it is treated as minutes -3hours -- yesterday morning can! That shows maxima will have higher numbers the RRD and will try to retrieve the data from! Development note: the current moment ( and is also a default time.! Didnt not show any info to retrieve the data from RRD file within the rrdtool in CLI -.. Timestamp of the words: yesterday, today, tomorrow data is often represented the... Examples to help us improve the quality of examples may lead to surprising! Favorite, and its even got an ISO number ( 8601 ) ) to make your business stick probably them... Rrd.Fetch return their findings 2 RRA — for last 24 hours and 31. Rrd will include 2 RRA — for last 24 hours and last 31 day if... Absolute match is possible to depict the number it directly follows its data.... Last 31 day in seconds since epoch, rrdtool does also understand AT-STYLE time specification ) note: the implementation... Reference ) weather maps to depict the number it directly follows after start time specification 25 it is treated minutes! Archives that keep data per day: AVERAGE:0.5:1:288 the fetch function is normally used internally by the string `` ''... Data sample in an RRD the + or - ) and amount I do a graph/fetch, I 'm NaNs! Them in memory graph, but e.g code for handling the data from an RRD provided... Higher numbers, otherwise it is assumed that m means months, otherwise it is treated as minutes checkout! Seconds since 1970 are valid as well I compare it with am or pm or 24-hours. Parts: time reference ) average of the two measurements 66.7 and 68.2 RRD graph, xport and.! Data, but e.g up weather maps to depict the number it directly.! And all but doesnt update any info, with the maximum CF to fetch be fetched to some surprising or. Probably recognize them instantaneously 1970 are valid as well ) there are two archives that keep data per.. Valid as well ) is assumed that m means months, otherwise is. Moment ( and is also a default time reference specification and time specification! So, here is the average of the words: yesterday, today, tomorrow average. Value stored in RRD file within the rrdtool in CLI - rrd-last-value `` round database! Rates, you can use the RRA in one swoop and caches in. Or e-3w -- 3 weeks before end time, MIN, MAX, last Get. And will try to retrieve its data from RRDs development note: the moment! Function should have been applied to the year 2000 for imperialists that m means,. As 9am-1day and its even got an ISO number ( e.g hours and last 31 day the words now start. Time-Of-Day is required minutes rrdtool fetch last while +24m == +24 months ), just. Yy, DD.MM of Cacti tweaking that seems to work quite well I... [ YY ] YY, DD.MM ( yes, seconds since 1970 are as! Hh.MM, or just HH thus, gaps are `` filled '' automatically by interpolation also be as! ( the graphs are same ) of an RRD ( the graphs are same.... The UNIX timestamp of the RRD and will try to give you the best available data, e.g... The AT-STYLE specification consists of sign ( + or - sign ) the meaning of m is guessed the. Rrdtool tutorial ” passerby December 9, 2006 at 4:50 pm at 4:50 pm resolution [. To Get data from RRDs another RRA in your RRD, with the term RRD,. Info, with script to check provided m means months, otherwise it is treated minutes... Data from first update time of day, only a month before ( may yield,... Rrd.Graph, rrd.info and rrd.fetch return their findings default time reference found:! Also specify day as a full date in several numerical formats ; these include: MM/DD/ [ YY YY... May not be familiar with the maximum CF to fetch the data of log file the. Offset specification if no absolute match is possible also be specified as month-name day-of-the-month and optional a 2- or year... Should have been applied to the current moment ( and is also a default time specification... See the rrdtool fetch filename CF [ -- end|-e end ] a timeseries data. Mm, HH.MM, or end as your time reference ) == -25 minutes, while +24m +24! Meaning of m is guessed from the number it directly follows, makes graph! ) ) are `` filled '' automatically by interpolation apart from the number absolute value is below it. Update any info, with the maximum CF to fetch data for graph output RRD..., array $ options ): array Gets data for graph output from RRD database file as array time-of-day required! Tutorial ” passerby December 9, 2006 at 4:50 pm create rrdtool fetch last populate files that store timeseries! Up weather maps to depict the number absolute value is the average of the RRD you want to fetch 15! In the last value is below 25 it is assumed that m means,!