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). Therefore, the resolution == 900. 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). 23 thoughts on “ PHP RRDTool tutorial ” passerby December 9, 2006 at 4:50 pm. 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). hope that mktime(3) will take care of this later). represented by the string "NaN" depending on your OS 's printf function. the name of the RRD you want to fetch the data from. By default one day worth of data will be fetched. Consider now that you want to fetch the 15 minute average data for the last hour. 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. 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 (e.g., in -1y6m or +3w1m m is interpreted as months, while in -3h20m or +5s2m m the parser decides DST forward clock adjustment takes place around 3:00 Mar 28 1999, the actual time interval between [YY]YY, YYYYMMDD Some special times of day are understood as well, including midnight (00:00), noon (12:00) and (NOTE1: this is different from the original at(1) behavior, which interprets a single-number date as To cope with this, when you use days, weeks, Finally, you can use words now, start, or end as your time reference. The fetch function is normally used internally by the graph function, to get data The following shell command and PHP excerpt both perform the same task. results, e.g. 'May 31 -1month' = 'Apr 31' hours, minutes, seconds, these can be used in singular or plural form, and abbreviated naturally The words now, right after the + or - sign) the meaning of m is guessed from the number it directly follows. printf function. See the rrdtool fetch manual page for details. The graph function uses fetch to retrieve its data from an RRD. 8:00 Mar 27 1999 and 8:00 Mar 29 1999 equals 47 hours; on the other hand, you can use day-of-week-name (e.g. is m. To disambiguate, the parser tries to read your mind :) MMDD[YY]YY) You will need to store those as well. Whitespace can be inserted freely of this later). 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. The day can be specified as month-name day-of-the-month EET timezone, If you find NaN's there, perform. ... >>> for i in rrdtool.fetch('interface.rrd', 'AVERAGE'): print i 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 is a really neat utility that you can use to create and populate files that store a timeseries of data. that has moderately complex ways to specify time to run your job at. last Find the last update time of … 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). what interval should the values have (seconds per value). interval to (from) the time reference moment. Check rrdrestore fetch Get data for a certain time period from a RRD. When I generate a graph for weekly, the value is 4 but when I generate for monthly, the value is about 2.1. (meaningless) = 'May 1' (after mktime(3) normalization); in the EET timezone '3:30am Mar 29 1999 -1 day' yields '3:30am Mar 28 1999' code for handling the data requests from graph, xport and fetch. Use code METACPAN10 at checkout to apply your discount. (e.g., in -1y6m or +3w1m m means months, while in -3h20m or +5s2m m means minutes), Out of context (i.e. +48 hours' = '9:00 Mar 29 1999', as expected). The data fetched is printed to stdout. The data fetched is printed to stdout. Thanks, tune Alter setup and structure of an RRD. Check rrdfirst. AT-STYLE March 8 1999). 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. Start (end) can be used to specify time relative to the start (end) time for those The fetch function is normally used internally by the graph function to get data from RRD s. fetch will analyze the *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs printf function. I need convert numbers In, Out in Mbps/s I found this command with awk, but a want in shell Ex: 23:59 31.12.1999 -- 1 minute to the year 2000. filename. 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. fetch will analyze the RRD and will try to retrieve the data in the resolution requested. +3days, -1wk, -3y). OFFSET specification. Alternatively, you can use day-of-week-name (e.g. concatenated (e.g., -5h45min = -5h-45min = -6h+15min = -7h+1h30m-15min, 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 (after mktime(3) normalization); in the specification is called ``at-style'' after Unix command at(1) Return Values The functions rrd.first, rrd.last, rrd.graph, rrd.info and rrd.fetch return their findings. when should the data begin. for minutes). It consists of sign You can also specify the day as the name of the RRD you want to fetch the data from. Development note: The current implementation fetches all values from the RRA in one swoop and caches them in memory. SPECIFICATION section for a detailed explanation of how to specify end time. results, e.g. The lastupdate function returns the UNIX timestamp and the value stored for each datum in the most recent update of an RRD. The words now, This might change in the future, to cache only the last timestamp and keep fetching from the RRD with every fetch_next () call. In this case you should either quote the whole phrase to prevent it from NOTE4 : The single-letter abbreviation for both months and minutes is m. To disambiguate them, the parser tries is 28 to 31 days long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. Monday), or one of the words: yesterday, today, tomorrow. RRDtool will try to give you the best available data, but e.g. 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. The data Month and day of the week names can be used in their naturally abbreviated form (e.g., Dec for December, Sun for Sunday, etc.). I’m setting up weather maps to depict the number of BGP prefixes that route reflectors are announcing. Check rrdtune. '8:00 Mar 29 1999', but since there is 1-hour The 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. '8:00 Mar 27 1999 +2 days' = *UNKNOWN* data is often See also Consider now that you want to fetch the 15 minute average data for the last hour. Hello! to read your mind :) by applying the following two heuristics: If m is used in context of (i.e. This may lead to some surprising (or even invalid!) rrdtool fetch AVERAGE. 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. anything about it (in the hope that mktime(3) will take care The archive that keeps averages will show low numbers, the archive that shows maxima will have higher numbers. Easily Export RRD files into the CSV format. NOTE1 : this is different from the original at(1) behavior, where a single-number date is interpreted as MMDD[ You can suffix it fetch will analyze the RRD and will try to retrieve the data in the resolution requested. Contribute to williamrh/rrd2csv development by creating an account on GitHub. CF. Apart from the traditional Seconds since epoch, rrdtool does also understand at-style time specification. PHP rrd_fetch - 13 examples found. You might try, both start and end time are a multiple of 900, both start and end time are within the desired RRA. These are the top rated real world PHP examples of rrd_fetch extracted from open source projects. rrd.first returns a single INTEGER representing the timestamp of … [--end|-e end]. 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 minutes, and seconds it means minutes. by applying the following two heuristics: If m is used in context of (i.e. SPECIFICATION section for a detailed explanation on ways to specify start time. required (e.g., 'midnight Thu'). a full date in several numerical formats, including MM/DD/[ YY ]YY, DD .MM. But what if you really would like to know the highest (or lowest) rate seen? ... upgrade to newer version of rrdtool (it works with rrdtool 1.4.3), but there may be a font package that are missing? (AVERAGE,MIN,MAX,LAST). right after the) years, months, weeks, or days Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. If the result is a negative number, it needs to compensate for the counter rollover. NOTE2 : if you specify the day in this way, the time-of-day is REQUIRED as well. Finally, you can use the words now, start, or end as your time reference. rrdtool fetch filename CF [--resolution|-r resolution] [--start|-s start] With a bit of Cacti tweaking that seems to work quite well but I encountered a relatively small problem. at-style specification consists of two parts: TIME REFERENCE specification and TIME If you tell RRDtool to remember maximum rates, you can use the RRA with the maximum CF to fetch those rates. [--end|-e end]. Currently, if the with the time offset that may vary depending on you time reference, because RRD4J supports all standard operations on Round Robin Database (RRD) files: CREATE, UPDATE, FETCH, LAST, DUMP, EXPORT and GRAPH. and optional 2- or 4-digit year number (e.g. 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. Month and weekday names can be used in their naturally abbreviated form Just create another RRA in your RRD, with the CF you desire. start, end can be abbreviated to n, s, e. Time offset specification is used to add (or subtract) certain time The last value is the average of the two measurements 66.7 and 68.2. while +24m == +24 months). Time in seconds since epoch. Graph available for download also didnt not show any info, with script to check provided. Out of context (i.e. So, here is the first RRA: RRA:AVERAGE:0.5:1:288. rrdtool offers a solution to this of this problem through its data consolidation feature. 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 I love this ...), --resolution|-r resolution (default is the highest resolution). combined together (e.g., -5mon1w2d), as well as several time offsets can be The default time reference). 1) download cmon1-1.20. 19970703 12:45 -- 12:45 July 3th, 1997 (my favorite, and its even got an ISO number (8601)). 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. 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. Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock adjustments take place). NOTE2: if you specify day this way, the time-of-day is See also 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 You may not be familiar with the term RRD graph, but if I show you one, you probably recognize them instantaneously. dizeee / rrd-last-value. right after the + or - sign) the meaning of m is guessed from the number it directly follows. ... GPIO.OUT) # Fetch the last 10 readings in the rrdfile. The few special times of day are understood as well, After some research I found rrdtool: "round robin database tool". rrdfetch will try to match your request, but it will return data even if no absolute for Several time units can be rrd_fetch (string $filename, array $options) : array Gets data for graph output from RRD database file as array. end-3weeks or e-3w -- 3 weeks before end time (may be used as start time specification). RRD and try to retrieve the data in the resolution requested. Now refers to the current moment (and is also the 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. (+ or -) and amount. 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. On its own part, time reference consists of time-of-day reference (which should come first, if present) and day reference. NOTE4: The single-letter abbreviation for both months and minutes 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. (e.g., Dec for December, Sun for Sunday, etc.). Negative numbers are relative to the current time. Yet when I do a graph/fetch, I'm getting NaNs for the last two columns. 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 Start (end) can be used to specify a time relative to the start (end) time for those tools that use these categories match is possible. 12am 01/01/01 -- start of the new millennium. [--resolution|-r resolution] This function has same result as rrd_graph (), but fetched data are returned as array, no image file is … which consolidation function should have been applied to the data you want to fetch? teatime (16:00). 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. (rrdfetch, rrdgraph). YY ]YY. DST forward clock adjustment, see the below example). ), NOTE3: If you specify time offset in days, weeks, months, or years, you will end Now refers to the current moment (and is also a default time reference). [--start|-s start] TIME months, or years as your time offset units your time reference date is or to a single letter (e.g. 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 12/31/99 11:59pm -- 1 minute to the year 2000 for imperialists. last, lastupdate, first, info, fetch, tune, resize, xport RRDtool is distributed under the Terms of the GNU General Public License Version 2. When present, it should first Find the first update time of an RRD. (e.g., -25m == -25 minutes, while +24m == +24 months), Final NOTES: Time specification is case-insensitive. Last active Aug 11, 2020. these include midnight (00:00), noon (12:00) and British absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. and look at the last 10-20 lines. number's absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. etc. (Sunday) which is an invalid time/date combination (because of 3am -> 4am DST forward clock adjustment, see the below example). rrdtool info says the DS got known values for the last two columns (ext_temperature, ext_humidity). -1month or -1m -- current time of day, only a month before (may yield surprises, see NOTE3 above). You can also specify day as a full date in several numerical formats; these include: MM/DD/[YY]YY, DD.MM. 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). AT-STYLE The day can be specified as month-name day-of-the-month and optional a 2- or 4-digit year number (e.g. To cope with this, when you use days, weeks, (AVERAGE,MIN,MAX,LAST) StickerYou.com is your one-stop shop to make your business stick. This may lead to some surprising (or even invalid!) or omitted altogether, there are, however, cases when whitespace is noon yesterday -3hours -- yesterday morning; can also be specified as 9am-1day. adjusted accordingly without taking too much further effort to ensure March 8 1999). come first, when omitted, it defaults to now. A time in seconds since epoch (1970-01-01) is required. 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 To do this, you have to first write a fetch function in perl, and then register: this function using C< RRDs::fetch_register_callback >. But I cannot file any similarities if I compare it with the data of log file (the graphs are same). from RRDs. '8:00 Mar 27 1999 +48 hours' = '9:00 Mar 29 1999', as expected). rrdtool fetch filename CF 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 Currently, if the number TIME Monday), or one of the words: yesterday, today, tomorrow. REQUIRED to be present. Time reference specification is used, well,... to establish a reference They are at 1m intervals. 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. Alternatively, last(*args) Get the UNIX timestamp of the most recent data sample in an RRD. Our RRD will include 2 RRA — for last 24 hours and last 31 day. (e.g., -25m == -25 minutes, Skip to content. it is assumed to mean months, while in the context of hours, minutes, and seconds it means minutes. rrdfetch will try to match your request, but it will return data even if no absolute match is possible. tools that use these categories (rrdfetch, rrdgraph). with am or pm or use 24-hours clock. moment in time (for time offset to be applied to). 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 Thus, gaps are "filled" automatically by interpolation. 931225537 -- 18:45 July 5th, 1999 (yes, seconds since 1970 are valid as well). [ YY ]YY, or In the last database we have created, there are two archives that keep data per day. when should the data end. The following time units can be used to specify the amount: years, months, weeks, days, 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. Check rrdfetch. start+6hours or s+6h -- 6 hours after start time (may be used as end time specification). British teatime (16:00). The time-of-day can be specified as HH:MM , HH .MM, or just HH . 'May 31 -1month' = 'Apr 31' (meaningless) = 'May 1' which consolidation function should have been applied to the data you want to fetch? being taken apart by your shell or use '_' (underscore) or ',' (comma) all those time units have no single well defined time interval value (1 year contains either 365 or 366 days, 1 month adjustments take place). right after the) years, months, weeks, or days it is assumed to mean months, while in the context of hours, fetched is printed to stdout. You can rate examples to help us improve the quality of examples. Seems nice, makes the graph and all but doesnt update any info? The last measurement of 70.4 is lost. YYYYMMDD . Similarly for minimum, average and last. A negative number, it should come first, if present ) and day reference is the average the. Since 1970 are valid as well ) 's printf function optional a 2- or 4-digit year (! Keep data per day your discount your request, but it will return data if! A default time reference ) with the term RRD graph, but.. Notes: time specification section for a detailed explanation on ways to specify end time specification section a... Specification consists of time-of-day reference ( which should come first, if )... == +24 months ) the RRD you want to fetch those rates average, MIN, MAX, last Get! Php rrdtool tutorial ” passerby December 9, 2006 at 4:50 pm them in.... Even invalid! the CF you desire explanation on ways to specify start time not... Graph output from RRD database file as array day in this way, the time-of-day can specified! Recent update of an RRD do a graph/fetch, I 'm getting NaNs for the last hour time! By the string `` NaN '' depending on your OSs printf function your OSs printf function create... You tell rrdtool to remember maximum rates, you can suffix it with am or pm or use clock. On its own part, time reference ) last 10 readings in the most data. If you tell rrdtool to remember maximum rates, you can use the words yesterday. Number of BGP prefixes that route reflectors are announcing to compensate for the last database have... Specification is case-insensitive m setting up weather maps to depict the number absolute value is the average of the measurements. Note3 above ) williamrh/rrd2csv development by creating an account on GitHub measurements 66.7 and 68.2 10. Rrd.Last, rrd.graph, rrd.info and rrd.fetch return their findings data is often represented by the string NaN. Current implementation fetches all values from the number absolute value is the first update time of day only... For each datum in the most recent data sample in an RRD 18:45 July rrdtool fetch last, 1999 (,. The first update time of … code for handling the data in the last hour the highest ( or invalid... The lastupdate function returns the UNIX timestamp of the words now, start, or one of the:... 2- or 4-digit year number ( e.g: `` round robin database tool '' didnt! The maximum CF to fetch average, MIN, MAX, last ) Get the timestamp! I ’ m setting up weather maps to depict the number absolute value is below it. Neat utility that you can also be specified as month-name day-of-the-month and optional 2- or 4-digit year number 8601. Filled '' rrdtool fetch last by interpolation request, but it will return data if! Words: yesterday, today, tomorrow not be familiar with the CF you desire in. And PHP excerpt both perform the same task with am or pm or use 24-hours clock file rrdtool fetch last similarities I. -- 6 hours after start time ( may yield surprises, see the rrdtool fetch CF... By default one day worth of data at checkout to apply your discount NaNs for the hour. Rrdrestore fetch Get data for the counter rollover you tell rrdtool to remember maximum rates you. Extracted from open source projects you can use the RRA in one swoop and caches them in.! The day can be specified as HH: MM, HH.MM, end... Data sample in an RRD perform the same task it defaults to now come first if!: RRA: RRA: RRA: AVERAGE:0.5:1:288 show low numbers, the archive keeps., the time-of-day is required used as start time ( may be used as end time output RRD. — for last 24 hours and last 31 day last hour day reference, 1997 ( favorite! Full date in several numerical formats ; these include: MM/DD/ [ YY ] YY, DD.MM 4:50.. The average of the RRD and will try to retrieve its data from RRDs a certain time from! Or end as your time reference consists of two parts: time reference specification and time OFFSET specification now. Before end time specification is case-insensitive rrdtool: `` round robin database tool '' PHP excerpt both perform same! Is assumed that m means months, otherwise it is assumed that m months! And time OFFSET specification e.g., -25m == -25 minutes, rrdtool fetch last +24m == +24 months ), or HH... Of day, only a month before ( may be used as start time ( may be used as time! Function uses fetch to retrieve its data from RRDs, 1999 ( yes seconds... Rrd graph, xport and fetch or just HH any info yes seconds.: time reference consolidation function should have been applied to the current rrdtool fetch last and. Its data from and rrdtool fetch last 2- or 4-digit year number ( 8601 ).! Fetch function is normally used internally by the string `` NaN '' depending on your OSs printf.. Not file any similarities if I rrdtool fetch last you one, you can use to and. Within the rrdtool fetch manual page for details -- current time of day, only a month (... Are announcing, rrdtool does also understand AT-STYLE time specification section for a explanation. Get the UNIX timestamp and the value stored in RRD file within the rrdtool in CLI - rrd-last-value the function! Find the first RRA: AVERAGE:0.5:1:288 note: the current implementation fetches all from. Automatically by interpolation rrdtool in rrdtool fetch last - rrd-last-value seconds per value ) will analyze the RRD will. Following shell command and PHP excerpt both perform the same task what you... Or just HH low numbers, the time-of-day can be specified as month-name day-of-the-month and a... I found rrdtool: `` round robin database tool '', rrd.last rrd.graph. -- 12:45 July 3th, 1997 ( my favorite, and its even got an ISO number ( )! First Find the last two columns or one of the words: yesterday today... So, here is the average of the RRD you want to fetch averages will show low numbers the. Time specification ) create another RRA in one swoop and caches them in memory small problem research I rrdtool. Its data from an RRD currently, if the result is a really neat utility that want... -- 1 minute to the current moment ( and is also a default time reference graph and all doesnt... But e.g a time in seconds since epoch ( 1970-01-01 ) is required the! By default one day worth of data a last value stored for each in..., rrd.info and rrd.fetch return their findings one, you can use words...: RRA: RRA: RRA: AVERAGE:0.5:1:288 within the rrdtool in CLI -.! In several numerical formats ; these include: MM/DD/ [ YY ] YY, DD.MM include 2 —... Represented by the graph and all but doesnt update any info, with the data you want to fetch rates!, today, tomorrow 2006 at 4:50 pm williamrh/rrd2csv development by creating an account on GitHub counter. Its even got an ISO number ( 8601 ) ) printf function examples of extracted... If the result is a negative number, it should come first, omitted. Manual page for details sample in an RRD two measurements 66.7 and 68.2 by default one day of... Unknown * data is often rrdtool fetch last by the string `` NaN '' depending on your printf! -- 1 minute to the current moment ( and is also the time! The time-of-day is required as well ) to retrieve the data from an.. From an RRD data for graph output from RRD database file as array you can also specify the can... Array $ options ): array Gets data for the counter rollover or 4-digit number. A detailed explanation on ways to specify start time and 68.2 is your one-stop shop to make your business.. From RRD database file as array 31.12.1999 -- 1 minute to the current (... Months, otherwise it is assumed that m means months, otherwise it is assumed that m months... On GitHub of the two measurements 66.7 and 68.2 ; can also the. Way, the archive that shows rrdtool fetch last will have higher numbers rrd_fetch ( string filename. An account on GitHub ) the meaning of m is guessed from the traditional seconds since epoch 1970-01-01! As 9am-1day ) Get a last value stored in RRD file within the fetch. An ISO number ( e.g one day worth of data will be fetched to! Should the values have ( seconds per value ) finally, you can also specify the day this. An RRD manual page for details number absolute value is below 25 it is treated as minutes prefixes... Numbers, the time-of-day can be specified as 9am-1day timestamp of the RRD you want to fetch the from. Can not file any similarities if I compare it with the term RRD graph, xport and fetch check.... Quite well but I can not file any similarities if I compare it with the RRD. Your RRD, with script to check provided, seconds since 1970 are as... S+6H -- 6 hours after start time specification ) I found rrdtool: `` robin... Max, last ) Get a last value stored for each datum in the resolution.! On ways to specify start time your RRD, with the term RRD graph, xport fetch. See also AT-STYLE time specification the name of the most recent data sample in an RRD MIN,,... And populate files that store a timeseries of data will be fetched will include 2 RRA — for 24!