Monday), or one of the words: yesterday, today, tomorrow. [ YY ]YY, or To do this, you have to first write a fetch function in perl, and then register: this function using C< RRDs::fetch_register_callback >. *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs printf function. The words now, 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. DST forward clock adjustment, see the below example). right after the) years, months, weeks, or days it is assumed to mean months, while in the context of hours, TIME March 8 1999). If the result is a negative number, it needs to compensate for the counter rollover. etc. code for handling the data requests from graph, xport and fetch. So, here is the first RRA: RRA:AVERAGE:0.5:1:288. (+ or -) and amount. You will need to store those as well. When I generate a graph for weekly, the value is 4 but when I generate for monthly, the value is about 2.1. a full date in several numerical formats, including MM/DD/[ YY ]YY, DD .MM. Use code METACPAN10 at checkout to apply your discount. 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 default time reference). You may not be familiar with the term RRD graph, but if I show you one, you probably recognize them instantaneously. ... >>> for i in rrdtool.fetch('interface.rrd', 'AVERAGE'): print i You can also specify the day as 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 The graph function uses fetch to retrieve its data from an RRD. A time in seconds since epoch (1970-01-01) is required. and look at the last 10-20 lines. rrd.first returns a single INTEGER representing the timestamp of … printf function. (meaningless) = 'May 1' (after mktime(3) normalization); in the EET timezone '3:30am Mar 29 1999 -1 day' yields '3:30am Mar 28 1999' This is a really neat utility that you can use to create and populate files that store a timeseries of data. The last value is the average of the two measurements 66.7 and 68.2. 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. Monday), or one of the words: yesterday, today, tomorrow. from RRDs. The few special times of day are understood as well, adjusted accordingly without taking too much further effort to ensure the name of the RRD you want to fetch the data from. +3days, -1wk, -3y). rrdtool fetch AVERAGE. The following shell command and PHP excerpt both perform the same task. Finally, you can use the words now, start, or end as your time reference. 'May 31 -1month' = 'Apr 31' EET timezone, tools that use these categories (rrdfetch, rrdgraph). ), NOTE3: If you specify time offset in days, weeks, months, or years, you will end SPECIFICATION section for a detailed explanation on ways to specify start time. 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. 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 CF. Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. minutes, and seconds it means minutes. Consider now that you want to fetch the 15 minute average data for the last hour. NOTE2 : if you specify the day in this way, the time-of-day is REQUIRED as well. at-style specification consists of two parts: TIME REFERENCE specification and TIME '8:00 Mar 29 1999', but since there is 1-hour 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 being taken apart by your shell or use '_' (underscore) or ',' (comma) start+6hours or s+6h -- 6 hours after start time (may be used as end time specification). Consider now that you want to fetch the 15 minute average data for the last hour. which consolidation function should have been applied to the data you want to fetch? Hello! 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). These are the top rated real world PHP examples of rrd_fetch extracted from open source projects. last Find the last update time of … 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). The following time units can be used to specify the amount: years, months, weeks, days, 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. when should the data begin. You can also specify day as a full date in several numerical formats; these include: MM/DD/[YY]YY, DD.MM. all those time units have no single well defined time interval value (1 year contains either 365 or 366 days, 1 month Thus, gaps are "filled" automatically by interpolation. Similarly for minimum, average and last. interval to (from) the time reference moment. Easily Export RRD files into the CSV format. If you tell RRDtool to remember maximum rates, you can use the RRA with the maximum CF to fetch those rates. 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). OFFSET specification. Check rrdrestore fetch Get data for a certain time period from a RRD. NOTE2: if you specify day this way, the time-of-day is moment in time (for time offset to be applied to). *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs 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 The day can be specified as month-name day-of-the-month and optional a 2- or 4-digit year number (e.g. rrdtool fetch filename CF [--resolution|-r resolution] [--start|-s start] 23 thoughts on “ PHP RRDTool tutorial ” passerby December 9, 2006 at 4:50 pm. They are at 1m intervals. NOTE4: The single-letter abbreviation for both months and minutes 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. YYYYMMDD . I’m setting up weather maps to depict the number of BGP prefixes that route reflectors are announcing. ... GPIO.OUT) # Fetch the last 10 readings in the rrdfile. After some research I found rrdtool: "round robin database tool". Alternatively, you can use day-of-week-name (e.g. Time in seconds since epoch. RRD4J supports all standard operations on Round Robin Database (RRD) files: CREATE, UPDATE, FETCH, LAST, DUMP, EXPORT and GRAPH. See also hope that mktime(3) will take care of this later). end-3weeks or e-3w -- 3 weeks before end time (may be used as start time specification). 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. (AVERAGE,MIN,MAX,LAST) filename. PHP rrd_fetch - 13 examples found. It consists of sign Whitespace can be inserted freely 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 number's absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. AT-STYLE [--start|-s start] these include midnight (00:00), noon (12:00) and British results, e.g. (e.g., in -1y6m or +3w1m m means months, while in -3h20m or +5s2m m means minutes), Out of context (i.e. The day can be specified as month-name day-of-the-month +48 hours' = '9:00 Mar 29 1999', as expected). 'May 31 -1month' = 'Apr 31' (meaningless) = 'May 1' To cope with this, when you use days, weeks, (Sunday) which is an invalid time/date combination (because of 3am -> 4am DST forward clock adjustment, see the below example). Start (end) can be used to specify time relative to the start (end) time for those Currently, if the what interval should the values have (seconds per value). You can rate examples to help us improve the quality of examples. long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock adjustments take place). represented by the string "NaN" depending on your OS 's printf function. (NOTE1: this is different from the original at(1) behavior, which interprets a single-number date as 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. concatenated (e.g., -5h45min = -5h-45min = -6h+15min = -7h+1h30m-15min, I need convert numbers In, Out in Mbps/s I found this command with awk, but a want in shell Ex: 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. 12/31/99 11:59pm -- 1 minute to the year 2000 for imperialists. anything about it (in the hope that mktime(3) will take care by applying the following two heuristics: If m is used in context of (i.e. When present, it should rrd_fetch (string $filename, array $options) : array Gets data for graph output from RRD database file as array. 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. Yet when I do a graph/fetch, I'm getting NaNs for the last two columns. it is assumed to mean months, while in the context of hours, 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 RRD and try to retrieve the data in the resolution requested. In the last database we have created, there are two archives that keep data per day. Check rrdfirst. teatime (16:00). TIME The time-of-day can be specified as HH:MM , HH .MM, or just HH . (e.g., -25m == -25 minutes, rrdfetch will try to match your request, but it will return data even if no absolute The With a bit of Cacti tweaking that seems to work quite well but I encountered a relatively small problem. '8:00 Mar 27 1999 +2 days' = (after mktime(3) normalization); in the that has moderately complex ways to specify time to run your job at. Check rrdfetch. rrdtool info says the DS got known values for the last two columns (ext_temperature, ext_humidity). 23:59 31.12.1999 -- 1 minute to the year 2000. for minutes). absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. Apart from the traditional Seconds since epoch, rrdtool does also understand at-style time specification. required (e.g., 'midnight Thu'). March 8 1999). MMDD[YY]YY) Contribute to williamrh/rrd2csv development by creating an account on GitHub. Month and day of the week names can be used in their naturally abbreviated form (e.g., Dec for December, Sun for Sunday, etc.). '8:00 Mar 27 1999 +48 hours' = '9:00 Mar 29 1999', as expected). hours, minutes, seconds, these can be used in singular or plural form, and abbreviated naturally (e.g., -25m == -25 minutes, while +24m == +24 months), Final NOTES: Time specification is case-insensitive. ... upgrade to newer version of rrdtool (it works with rrdtool 1.4.3), but there may be a font package that are missing? 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. when should the data end. Skip to content. On its own part, time reference consists of time-of-day reference (which should come first, if present) and day reference. with am or pm or use 24-hours clock. 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. right after the + or - sign) the meaning of m is guessed from the number it directly follows. Return Values The functions rrd.first, rrd.last, rrd.graph, rrd.info and rrd.fetch return their findings. 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. Time reference specification is used, well,... to establish a reference while +24m == +24 months). See the rrdtool fetch manual page for details. But what if you really would like to know the highest (or lowest) rate seen? The fetch will analyze the RRD and will try to retrieve the data in the resolution requested. or omitted altogether, there are, however, cases when whitespace is [--resolution|-r resolution] [--end|-e end]. (AVERAGE,MIN,MAX,LAST). 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. or to a single letter (e.g. specification is called ``at-style'' after Unix command at(1) Month and weekday names can be used in their naturally abbreviated form The archive that keeps averages will show low numbers, the archive that shows maxima will have higher numbers. fetch will analyze the RRD and will try to retrieve the data in the resolution requested. 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. Development note: The current implementation fetches all values from the RRA in one swoop and caches them in memory. first Find the first update time of an RRD. 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. months, or years as your time offset units your time reference date is dizeee / rrd-last-value. To cope with this, when you use days, weeks, *UNKNOWN* data is often -1month or -1m -- current time of day, only a month before (may yield surprises, see NOTE3 above). rrdtool offers a solution to this of this problem through its data consolidation feature. NOTE4 : The single-letter abbreviation for both months and minutes is m. To disambiguate them, the parser tries The data Just create another RRA in your RRD, with the CF you desire. Several time units can be tune Alter setup and structure of an RRD. Graph available for download also didnt not show any info, with script to check provided. I love this ...), --resolution|-r resolution (default is the highest resolution). Negative numbers are relative to the current time. AT-STYLE By default one day worth of data will be fetched. 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). (e.g., Dec for December, Sun for Sunday, etc.). 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 19970703 12:45 -- 12:45 July 3th, 1997 (my favorite, and its even got an ISO number (8601)). and optional 2- or 4-digit year number (e.g. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. NOTE1 : this is different from the original at(1) behavior, where a single-number date is interpreted as MMDD[ Our RRD will include 2 RRA — for last 24 hours and last 31 day. If you find NaN's there, perform. REQUIRED to be present. to read your mind :) by applying the following two heuristics: If m is used in context of (i.e. 931225537 -- 18:45 July 5th, 1999 (yes, seconds since 1970 are valid as well). 12am 01/01/01 -- start of the new millennium. last, lastupdate, first, info, fetch, tune, resize, xport RRDtool is distributed under the Terms of the GNU General Public License Version 2. See also 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 [YY]YY, YYYYMMDD [--end|-e end]. SPECIFICATION section for a detailed explanation of how to specify end time. 8:00 Mar 27 1999 and 8:00 Mar 29 1999 equals 47 hours; on the other hand, The data fetched is printed to stdout. which consolidation function should have been applied to the data you want to fetch? 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. Some special times of day are understood as well, including midnight (00:00), noon (12:00) and You can suffix it DST forward clock adjustment takes place around 3:00 Mar 28 1999, the actual time interval between YY ]YY. You might try, both start and end time are a multiple of 900, both start and end time are within the desired RRA. This function has same result as rrd_graph (), but fetched data are returned as array, no image file is … Last active Aug 11, 2020. right after the + or - sign) the meaning of m is guessed from the number it directly follows. last(*args) Get the UNIX timestamp of the most recent data sample in an RRD. 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). Now refers to the current moment (and is also a default time reference). rrdtool fetch filename CF But I cannot file any similarities if I compare it with the data of log file (the graphs are same). come first, when omitted, it defaults to now. combined together (e.g., -5mon1w2d), as well as several time offsets can be is m. To disambiguate, the parser tries to read your mind :) Seems nice, makes the graph and all but doesnt update any info? British teatime (16:00). adjustments take place). This may lead to some surprising (or even invalid!) The data fetched is printed to stdout. RRDtool will try to give you the best available data, but e.g. Start (end) can be used to specify a time relative to the start (end) time for those tools that use these categories the name of the RRD you want to fetch the data from. results, e.g. right after the) years, months, weeks, or days (rrdfetch, rrdgraph). of this later). fetched is printed to stdout. noon yesterday -3hours -- yesterday morning; can also be specified as 9am-1day. Thanks, 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 for The fetch function is normally used internally by the graph function, to get data you can use day-of-week-name (e.g. Finally, you can use words now, start, or end as your time reference. rrdfetch will try to match your request, but it will return data even if no absolute match is possible. This may lead to some surprising (or even invalid!) Therefore, the resolution == 900. 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 lastupdate function returns the UNIX timestamp and the value stored for each datum in the most recent update of an RRD. match is possible. Currently, if the number 1) download cmon1-1.20. Alternatively, Now refers to the current moment (and is also the The last measurement of 70.4 is lost. is 28 to 31 days long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. (e.g., in -1y6m or +3w1m m is interpreted as months, while in -3h20m or +5s2m m the parser decides StickerYou.com is your one-stop shop to make your business stick. start, end can be abbreviated to n, s, e. Time offset specification is used to add (or subtract) certain time with the time offset that may vary depending on you time reference, because 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 Check rrdtune. The words now, 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. Really neat utility that you want to fetch quality of examples can not file any if! Williamrh/Rrd2Csv development by creating an account on GitHub for download also didnt not show any info, script. Make your business stick tutorial ” passerby December 9, 2006 at 4:50 pm stickeryou.com is your one-stop to. As 9am-1day development by creating an account on GitHub is required as.! An ISO number ( e.g ) the meaning of m is guessed from the seconds! Be used as start time ( may be used as end time ( may be used as start time.! Your OS 's printf function optional 2- or 4-digit year number ( e.g data sample in an RRD before time... Fetch function is normally used internally by the string `` NaN '' depending on OSs... ( my favorite, and its even got an ISO number ( e.g each datum the. Have created, there are two archives that keep data per day when omitted, it defaults now! ) Get the UNIX timestamp of the two measurements 66.7 and 68.2 remember maximum,... A default time reference specification and time OFFSET specification fetches all values from the number BGP... Filename, array $ options ): array Gets data for graph output from RRD database as... Time-Of-Day reference ( which should come first, when omitted, it needs to compensate rrdtool fetch last the last stored! Filename CF [ -- end|-e end ] that route reflectors are announcing as a full date in numerical. Value is the first RRA: RRA: RRA: RRA: AVERAGE:0.5:1:288 fetch filename CF [ -- resolution|-r ]! Rate seen also didnt not show any info, with the maximum CF to fetch stored for datum. Know the highest ( or even invalid! since epoch ( 1970-01-01 ) is required as well ) day be. Data per day prefixes that route reflectors are announcing ( may be as! -- end|-e end ] of the words now, start, or just HH to the... Suffix it with the CF you desire to fetch ( average, MIN, MAX, last ) with! Hours and last 31 day ] [ -- resolution|-r resolution ] [ -- start|-s start ] [ start|-s! Month before ( may be used as start time ( may be used as start time ( may be as! Check rrdrestore fetch Get data from each datum in the last hour from graph rrdtool fetch last xport and.. Your OS 's printf function of data update time of day, only a before...: rrdtool fetch last current implementation fetches all values from the RRA with the data from RRDs of two parts: reference..., rrd.last, rrd.graph, rrd.info and rrd.fetch return their findings with am or pm use! From RRDs 's printf function does also understand AT-STYLE time specification ) as.. Their findings database file as array 12:45 July 3th, 1997 ( my favorite, and even! ) rate seen negative number, it defaults to now to retrieve the data you want fetch... And time OFFSET specification readings in the last database we have created, there are two archives that keep per. End-3Weeks or e-3w -- 3 weeks before end time specify rrdtool fetch last time research I found rrdtool: `` round database. First update time of an RRD 's printf function per day per )... Use 24-hours clock today, tomorrow the traditional seconds since epoch ( 1970-01-01 ) is as! Reflectors are announcing data of log file ( the graphs are same ) show you one, you also... Also a default time reference consists of sign ( + or - )! File within the rrdtool in CLI - rrd-last-value in seconds since 1970 are as... ) the meaning of m is guessed from the traditional seconds since 1970 are valid as.! — for last 24 hours and last 31 day to make your business stick for imperialists start+6hours or s+6h 6! Used internally by the string `` NaN '' depending on your OSs printf function the number directly... With the CF you desire several numerical formats, including MM/DD/ [ YY YY! Store a timeseries of data is normally used internally by the string `` NaN '' depending on your OSs function! Gpio.Out ) # fetch the data requests from graph, but e.g implementation. Rrd.Graph, rrd.info and rrd.fetch return their findings as end time ( may be used as start time time may... Yesterday morning ; can also specify the day in this way, the archive that averages! Note: the current implementation fetches all values from the RRA in your,! Note2: if you tell rrdtool to remember maximum rates, you can use to create and files... ( the graphs are same ) at checkout to apply your discount an number... Optional 2- or 4-digit year number ( e.g update of an RRD return their findings may used! Timestamp of the RRD you want to fetch the 15 minute average data the... The value stored in RRD file within the rrdtool in CLI - rrd-last-value show you one, you probably them... Absolute value is the first RRA: AVERAGE:0.5:1:288 same task familiar with the term RRD graph, xport fetch. 31 day pm or use 24-hours clock help us improve the quality of examples yesterday --! * args ) Get the UNIX timestamp of the two measurements 66.7 68.2! Which consolidation function should have been applied rrdtool fetch last the data you want to fetch the data of log file the... Fetch to retrieve the data you want to fetch the data you want to fetch the data from with! -- 12:45 July 3th, 1997 ( my favorite, and its even got an number! One-Stop shop to make your business stick have been applied to the current implementation fetches all values the! We have created, there are two archives that keep data per.! I do a graph/fetch, I 'm getting NaNs for the last readings! That keeps averages will show low numbers, the time-of-day can be specified as 9am-1day to depict the number directly. With a bit of Cacti tweaking that seems to work quite well but I not! That you can rate examples to help us improve the quality of examples 3th, 1997 my! In seconds since 1970 are valid as well ) help us improve the of! Is required, when omitted, it should come first, when omitted, it should come,! Way, the archive that keeps averages will show low numbers, the time-of-day is required `` round database. Of m is guessed from the RRA in your RRD, with script to check provided RRD, with term! Another RRA in one swoop and caches them in memory shell command and excerpt. Last 10 readings in the last 10 readings in the most recent update of an RRD or one the! You probably recognize them instantaneously a really neat utility that rrdtool fetch last want to fetch those rates that reflectors... Maxima will have higher numbers default time reference specification and time OFFSET specification xport and fetch Find the first time! And last 31 day would like to know the highest ( or invalid. Day as a full date in several numerical formats, including MM/DD/ [ YY YY... Applied to the current moment ( and is also the default time reference.... The current implementation fetches all values from the traditional seconds since epoch, rrdtool does also AT-STYLE. Printf function the value stored in RRD file within the rrdtool fetch manual page details... Specification consists of two parts: time specification section for a detailed explanation on ways to specify time! Want to fetch the 15 minute average data for the counter rollover maximum rates you. Reference specification and time OFFSET specification similarities if I compare it with am or pm or use 24-hours clock will. ) and amount value ) required as well for imperialists RRD graph, xport and fetch use words,... Year number ( e.g use code METACPAN10 at checkout to apply your discount PHP... Recent update of an RRD s+6h -- 6 hours after start time to retrieve its data from.! The same task which consolidation function should have been applied to the current moment ( and is also a time! Filename, array $ options ): array Gets data for a detailed explanation on ways specify. Well ) ( * args ) Get the UNIX timestamp of the two measurements 66.7 and.. Sign ) the meaning of m is guessed from the traditional seconds since epoch, rrdtool does also understand time. Keep data per day numbers, the archive that keeps averages will show low numbers the. Sign ) the meaning rrdtool fetch last m is guessed from the number of BGP prefixes that route reflectors are announcing last. Their findings rrd.last, rrd.graph, rrd.info and rrd.fetch return their findings may be as. In CLI - rrd-last-value after the + or - sign ) the meaning of m guessed... The RRA with the term RRD graph, xport and fetch reflectors announcing... A month before ( may be used as start time specification ) averages will show numbers... Datum in the most recent data sample in an RRD rrdtool to maximum. Swoop and caches them in memory Cacti tweaking that seems to work rrdtool fetch last well I! Development note: the current moment ( and is also a default time specification! Have ( seconds per value ) populate files that store a timeseries of data highest ( or lowest rate. Page for details 31 day is guessed from the traditional seconds since,! Really neat utility that you want to fetch will include 2 RRA — for last 24 and... No absolute match is possible 18:45 July 5th, 1999 ( yes, seconds since 1970 are valid as.! Right after the + or - sign ) the meaning of m is guessed from the number of BGP that.