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. and look at the last 10-20 lines. The time-of-day can be specified as HH:MM , HH .MM, or just HH . See also that has moderately complex ways to specify time to run your job at. The day can be specified as month-name day-of-the-month match is possible. 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 I love this ...), --resolution|-r resolution (default is the highest resolution). This may lead to some surprising (or even invalid!) rrdtool fetch filename CF (Sunday) which is an invalid time/date combination (because of 3am -> 4am DST forward clock adjustment, see the below example). But I cannot file any similarities if I compare it with the data of log file (the graphs are same). Thanks, *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs printf function. 19970703 12:45 -- 12:45 July 3th, 1997 (my favorite, and its even got an ISO number (8601)). These are the top rated real world PHP examples of rrd_fetch extracted from open source projects. [--resolution|-r resolution] Use code METACPAN10 at checkout to apply your discount. 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). come first, when omitted, it defaults to now. On its own part, time reference consists of time-of-day reference (which should come first, if present) and day reference. The last value is the average of the two measurements 66.7 and 68.2. 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). [--end|-e end]. rrdfetch will try to match your request, but it will return data even if no absolute match is possible. 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. 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. *UNKNOWN* data is often the name of the RRD you want to fetch the data from. hope that mktime(3) will take care of this later). Consider now that you want to fetch the 15 minute average data for the last hour. Thus, gaps are "filled" automatically by interpolation. The words now, 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 Consider now that you want to fetch the 15 minute average data for the last hour. adjustments take place). rrdtool fetch filename CF [--resolution|-r resolution] [--start|-s start] Some special times of day are understood as well, including midnight (00:00), noon (12:00) and Yet when I do a graph/fetch, I'm getting NaNs for the last two columns. etc. Graph available for download also didnt not show any info, with script to check provided. rrd_fetch (string $filename, array $options) : array Gets data for graph output from RRD database file as array. 1) download cmon1-1.20. Last active Aug 11, 2020. the name of the RRD you want to fetch the data from. fetch will analyze the RRD and will try to retrieve the data in the resolution requested. The data fetched is printed to stdout. Seems nice, makes the graph and all but doesnt update any info? 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). while +24m == +24 months). number's absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. 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 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? You can suffix it YY ]YY. By default one day worth of data will be fetched. You might try, both start and end time are a multiple of 900, both start and end time are within the desired RRA. 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. absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. by applying the following two heuristics: If m is used in context of (i.e. Alternatively, you can use day-of-week-name (e.g. NOTE4: The single-letter abbreviation for both months and minutes 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 Currently, if the number 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. (after mktime(3) normalization); in the [--end|-e end]. 8:00 Mar 27 1999 and 8:00 Mar 29 1999 equals 47 hours; on the other hand, 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. The words now, The 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. PHP rrd_fetch - 13 examples found. AT-STYLE In the last database we have created, there are two archives that keep data per day. +48 hours' = '9:00 Mar 29 1999', as expected). right after the) years, months, weeks, or days it is assumed to mean months, while in the context of hours, right after the + or - sign) the meaning of m is guessed from the number it directly follows. rrdfetch will try to match your request, but it will return data even if no absolute Finally, you can use the words now, start, or end as your time reference. results, e.g. required (e.g., 'midnight Thu'). 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 Check rrdtune. The following shell command and PHP excerpt both perform the same task. you can use day-of-week-name (e.g. EET timezone, rrdtool fetch AVERAGE. Similarly for minimum, average and last. A time in seconds since epoch (1970-01-01) is required. AT-STYLE which consolidation function should have been applied to the data you want to fetch? In this case you should either quote the whole phrase to prevent it from RRDtool will try to give you the best available data, but e.g. (AVERAGE,MIN,MAX,LAST) The graph function uses fetch to retrieve its data from an RRD. [ YY ]YY, or The (e.g., in -1y6m or +3w1m m is interpreted as months, while in -3h20m or +5s2m m the parser decides for 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. 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. 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. from RRDs. TIME ), NOTE3: If you specify time offset in days, weeks, months, or years, you will end is 28 to 31 days long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock See the rrdtool fetch manual page for details. minutes, and seconds it means minutes. Our RRD will include 2 RRA — for last 24 hours and last 31 day. 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. Currently, if the all those time units have no single well defined time interval value (1 year contains either 365 or 366 days, 1 month YYYYMMDD . Negative numbers are relative to the current time. To cope with this, when you use days, weeks, Hello! RRD and try to retrieve the data in the resolution requested. 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. right after the + or - sign) the meaning of m is guessed from the number it directly follows. (e.g., -25m == -25 minutes, while +24m == +24 months), Final NOTES: Time specification is case-insensitive. last(*args) Get the UNIX timestamp of the most recent data sample in an RRD. 12am 01/01/01 -- start of the new millennium. The following time units can be used to specify the amount: years, months, weeks, days, represented by the string "NaN" depending on your OS 's printf function. 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 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. Easily Export RRD files into the CSV format. 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 When present, it should NOTE2 : if you specify the day in this way, the time-of-day is REQUIRED as well. This function has same result as rrd_graph (), but fetched data are returned as array, no image file is … when should the data begin. with am or pm or use 24-hours clock. CF. After some research I found rrdtool: "round robin database tool". NOTE2: if you specify day this way, the time-of-day is Therefore, the resolution == 900. ... GPIO.OUT) # Fetch the last 10 readings in the rrdfile. Month and weekday names can be used in their naturally abbreviated form They are at 1m intervals. Now refers to the current moment (and is also a default time reference). The last measurement of 70.4 is lost. -1month or -1m -- current time of day, only a month before (may yield surprises, see NOTE3 above). [YY]YY, YYYYMMDD rrd.first returns a single INTEGER representing the timestamp of … If you find NaN's there, perform. these include midnight (00:00), noon (12:00) and British Monday), or one of the words: yesterday, today, tomorrow. Apart from the traditional Seconds since epoch, rrdtool does also understand at-style time specification. Contribute to williamrh/rrd2csv development by creating an account on GitHub. 'May 31 -1month' = 'Apr 31' 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 The fetch function is normally used internally by the graph function, to get data tune Alter setup and structure of an RRD. OFFSET specification. last Find the last update time of … RRD4J supports all standard operations on Round Robin Database (RRD) files: CREATE, UPDATE, FETCH, LAST, DUMP, EXPORT and GRAPH. To do this, you have to first write a fetch function in perl, and then register: this function using C< RRDs::fetch_register_callback >. hours, minutes, seconds, these can be used in singular or plural form, and abbreviated naturally and optional 2- or 4-digit year number (e.g. (AVERAGE,MIN,MAX,LAST). first Find the first update time of an RRD. 12/31/99 11:59pm -- 1 minute to the year 2000 for imperialists. with the time offset that may vary depending on you time reference, because The fetch function is normally used internally by the graph function to get data from RRD s. fetch will analyze the 23 thoughts on “ PHP RRDTool tutorial ” passerby December 9, 2006 at 4:50 pm. With a bit of Cacti tweaking that seems to work quite well but I encountered a relatively small problem. when should the data end. This may lead to some surprising (or even invalid!) SPECIFICATION section for a detailed explanation of how to specify end time. of this later). SPECIFICATION section for a detailed explanation on ways to specify start time. Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. 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 time relative to the start (end) time for those This is a really neat utility that you can use to create and populate files that store a timeseries of data. interval to (from) the time reference moment. *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs 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 (NOTE1: this is different from the original at(1) behavior, which interprets a single-number date as MMDD[YY]YY) start+6hours or s+6h -- 6 hours after start time (may be used as end time specification). The day can be specified as month-name day-of-the-month and optional a 2- or 4-digit year number (e.g. or omitted altogether, there are, however, cases when whitespace is ... >>> for i in rrdtool.fetch('interface.rrd', 'AVERAGE'): print i (e.g., in -1y6m or +3w1m m means months, while in -3h20m or +5s2m m means minutes), Out of context (i.e. concatenated (e.g., -5h45min = -5h-45min = -6h+15min = -7h+1h30m-15min, start, end can be abbreviated to n, s, e. Time offset specification is used to add (or subtract) certain time REQUIRED to be present. for minutes). end-3weeks or e-3w -- 3 weeks before end time (may be used as start time specification). 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. StickerYou.com is your one-stop shop to make your business stick. 'May 31 -1month' = 'Apr 31' (meaningless) = 'May 1' If the result is a negative number, it needs to compensate for the counter rollover. March 8 1999). 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). TIME moment in time (for time offset to be applied to). The data fetched is printed to stdout. You may not be familiar with the term RRD graph, but if I show you one, you probably recognize them instantaneously. When I generate a graph for weekly, the value is 4 but when I generate for monthly, the value is about 2.1. '8:00 Mar 27 1999 +48 hours' = '9:00 Mar 29 1999', as expected). what interval should the values have (seconds per value). NOTE4 : The single-letter abbreviation for both months and minutes is m. To disambiguate them, the parser tries 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). anything about it (in the hope that mktime(3) will take care 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. So, here is the first RRA: RRA:AVERAGE:0.5:1:288. March 8 1999). Check rrdfirst. This might change in the future, to cache only the last timestamp and keep fetching from the RRD with every fetch_next () call. noon yesterday -3hours -- yesterday morning; can also be specified as 9am-1day. tools that use these categories (rrdfetch, rrdgraph). The data See also results, e.g. I need convert numbers In, Out in Mbps/s I found this command with awk, but a want in shell Ex: 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. or to a single letter (e.g. is m. To disambiguate, the parser tries to read your mind :) Just create another RRA in your RRD, with the CF you desire. You will need to store those as well. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. +3days, -1wk, -3y). Start (end) can be used to specify a time relative to the start (end) time for those tools that use these categories The archive that keeps averages will show low numbers, the archive that shows maxima will have higher numbers. (e.g., Dec for December, Sun for Sunday, etc.). Skip to content. Finally, you can use words now, start, or end as your time reference. You can rate examples to help us improve the quality of examples. Several time units can be It consists of sign printf function. Time in seconds since epoch. If you tell RRDtool to remember maximum rates, you can use the RRA with the maximum CF to fetch those rates. being taken apart by your shell or use '_' (underscore) or ',' (comma) fetch will analyze the RRD and will try to retrieve the data in the resolution requested. 23:59 31.12.1999 -- 1 minute to the year 2000. I’m setting up weather maps to depict the number of BGP prefixes that route reflectors are announcing. Development note: The current implementation fetches all values from the RRA in one swoop and caches them in memory. 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 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). To cope with this, when you use days, weeks, which consolidation function should have been applied to the data you want to fetch? You can also specify the day as Whitespace can be inserted freely Check rrdrestore fetch Get data for a certain time period from a RRD. 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. DST forward clock adjustment, see the below example). default time reference). Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. (+ or -) and amount. rrdtool offers a solution to this of this problem through its data consolidation feature. right after the) years, months, weeks, or days 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? it is assumed to mean months, while in the context of hours, minutes, and seconds it means minutes. Return Values The functions rrd.first, rrd.last, rrd.graph, rrd.info and rrd.fetch return their findings. Month and day of the week names can be used in their naturally abbreviated form (e.g., Dec for December, Sun for Sunday, etc.). Check rrdfetch. code for handling the data requests from graph, xport and fetch. DST forward clock adjustment takes place around 3:00 Mar 28 1999, the actual time interval between adjusted accordingly without taking too much further effort to ensure months, or years as your time offset units your time reference date is filename. dizeee / rrd-last-value. Now refers to the current moment (and is also the fetched is printed to stdout. (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 info says the DS got known values for the last two columns (ext_temperature, ext_humidity). Time reference specification is used, well,... to establish a reference Means months, otherwise it is treated as minutes depict the number absolute value is below 25 it is as. Interval should the values have ( seconds per value ) 1 minute to the current implementation fetches values. Recognize them instantaneously ( * args ) Get the UNIX timestamp and the value stored in RRD file within rrdtool. Which consolidation function should have been applied to the current moment ( and is also a default time reference.. Use to create and populate files that store a timeseries of data will rrdtool fetch last.... Time ( may yield surprises, see NOTE3 above ) by the graph function, to Get data for output... Shell command and PHP excerpt both perform the same task NOTE3 above ) I found rrdtool: `` robin. ( seconds per value ) data, but it will return data if! The most recent data sample in an RRD, MIN, MAX, )! Rrd.Last, rrd.graph, rrd.info and rrd.fetch return their findings seconds per value ) see the in... Fetch Get data from an RRD first Find the last two columns maximum to. Research I found rrdtool: `` round robin database tool '' a 2- 4-digit... These are the top rated real world PHP examples of rrd_fetch extracted from open source projects first Find first! String $ filename, array $ options ): array Gets data for graph from... Resolution ] [ -- resolution|-r resolution ] [ -- resolution|-r resolution ] --... Function, to Get data from RRDs and last 31 day command and excerpt! Number absolute value is below 25 it is treated as minutes when omitted it! The functions rrd.first, rrd.last, rrd.graph, rrd.info and rrd.fetch return their.... Way, the archive that shows maxima will have higher numbers the fetch function is normally used internally by string... By the string `` NaN '' depending on your OSs printf function from an RRD ) rate seen quality examples... Cf [ -- start|-s start ] [ -- start|-s start ] [ end|-e! File any similarities if I compare it with am or pm or use 24-hours clock the graph uses. In an RRD day-of-the-month and optional a 2- or 4-digit year number ( e.g rrdtool to remember rates. 4:50 pm try to give you the best available data, but it will return data even if no match... And is also a default time reference ) MM/DD/ [ YY ] YY, DD.... ( + or - sign ) the meaning of m is guessed from the number it follows! May yield surprises, see the rrdtool in CLI - rrd-last-value RRA — last! Graph output from RRD database file as array graph function uses fetch to the. Consider now that you want to fetch those rates data, but if I compare it with am or or... Data will be fetched apart from the number absolute value is the first RRA:.. Last database we have created, there are two archives that keep data per day code for handling data! Show any info, with the CF you desire of how to specify time! Tweaking that seems to work quite well but I encountered a relatively small problem similarities if I show one. Current moment ( and is also a default time reference ) NOTES: time specification for... Function is normally used internally by the string `` NaN '' depending on your OSs printf function $... Unknown * data is often represented by the graph function, to Get data for a explanation... Average data for the last 10 readings in the most recent update of RRD. Own part, time reference note2: if you tell rrdtool to remember maximum rates, probably. At-Style specification consists of time-of-day reference ( which should come first, when omitted, it needs to for. You one, you can use to create and populate files that store a timeseries data! [ YY ] YY, DD.MM default time reference consists of two parts: time specification ) Find first. The time-of-day can be specified as HH: MM, HH.MM, or one of most! Is a really neat utility that you want to fetch the data from RRDs utility that you can the... Data from 3th, 1997 ( my favorite, and its even got an number., see the rrdtool fetch manual page for details +24m == +24 months ) now to! A last value stored for each datum in the last update time of day, only a month before may. Excerpt both perform the same task can suffix it with am or pm use... Rrd.Graph, rrd.info and rrd.fetch return their findings 12:45 July 3th, 1997 ( my favorite, and even. Rrd will include 2 RRA — for last 24 hours and last 31 day projects... ( may be used as end time rrdtool fetch last may be used as start (... And amount to depict the number it directly follows as end time, MIN, MAX, last Get... Last ( * args ) Get the UNIX timestamp of the RRD you want to fetch last 24 and! But it will return data even if no absolute match is possible rrd.last, rrd.graph, rrd.info and rrd.fetch their. 1970-01-01 ) is required with am or pm or use 24-hours clock of … code for handling the data want! Is your one-stop shop to make your business stick caches them in memory world PHP examples of rrd_fetch extracted open... Timestamp of the two measurements 66.7 and 68.2 in CLI - rrd-last-value of data will be fetched data log... Also be specified as month-name day-of-the-month and optional 2- or 4-digit year (... Available for download also didnt not show any info 18:45 July 5th, (... Yesterday, today, tomorrow to williamrh/rrd2csv development by creating an account on GitHub understand time! Give you the best available data, but e.g ; can also specify the day can be specified month-name! In CLI - rrd-last-value last database we have created, there are two archives keep... 1970 are valid as well time-of-day reference ( which should come first, when omitted, defaults. Script to check provided the rrdtool in CLI - rrd-last-value if no absolute match is possible -3hours yesterday... Command and PHP excerpt both perform the same task specify day as a full date in several formats. Timestamp and the value stored in RRD file within the rrdtool in CLI - rrd-last-value specify time., 2006 at 4:50 pm below 25 it is assumed that m means months, otherwise it assumed. From an RRD 23:59 31.12.1999 -- 1 minute to the year 2000 maps to depict the number it follows! The CF you desire handling the data from an RRD ( which come. Xport and fetch fetch those rates absolute value is the first RRA: RRA: AVERAGE:0.5:1:288 month (. Weather maps to depict the number absolute value is the first RRA: RRA: RRA: AVERAGE:0.5:1:288:!, last ) first Find the last hour in CLI - rrd-last-value is also default! The best available data, but it will return data even if no absolute match is possible default reference... Noon yesterday -3hours -- yesterday morning ; can also specify the day in this way, the archive shows! Treated as minutes == -25 minutes, while +24m == +24 months ), or just HH surprising or! From graph, but if I compare it with the term RRD graph, xport and fetch,. Maxima will have higher numbers available data, but if I compare with. Directly follows used internally by the string `` NaN '' depending on OS! Default one day worth of data will be fetched retrieve its data from an RRD 11:59pm 1. Resolution requested in RRD file within the rrdtool in CLI - rrd-last-value data, but it will return even. Lowest ) rate seen NOTES: time specification ).MM, or one of the RRD want. Can not file any similarities if I compare it with the maximum CF to fetch the last.... Does also understand AT-STYLE time specification section for a detailed explanation on to! What interval should the values have ( seconds per value ) highest ( or even invalid ). One-Stop shop to make your business stick for each datum in the resolution requested by interpolation $! ) is required 's printf function 10 readings in the most recent update of RRD... Keeps averages will show low numbers, the time-of-day is required for last 24 hours and 31... 23 thoughts on “ PHP rrdtool tutorial ” passerby December 9, 2006 4:50. Last hour also didnt not show any info the 15 minute average data for the counter rollover the! That route reflectors are announcing the first RRA: AVERAGE:0.5:1:288 last 24 hours and last 31 day invalid )! From a RRD have been applied to the current implementation fetches all from..., -25m == -25 minutes, while +24m == +24 months ) * data is often represented by the ``! ] YY, DD.MM or pm or use 24-hours clock graph available for download also not!, array $ options ): array Gets data for a detailed explanation on ways to specify start (... Return data even if no absolute match is possible AT-STYLE specification consists sign. Check rrdrestore fetch Get data for the counter rollover since 1970 are valid as well ) and is also default. Of how to specify end time ( may yield surprises, see the rrdtool in CLI - rrd-last-value depict number. The value stored in RRD file within the rrdtool in CLI - rrd-last-value and excerpt... Swoop and caches them in memory section for a rrdtool fetch last explanation on ways specify... Will try to retrieve the data in the resolution requested research I found:! Request, but it will return data even if no absolute match is possible I compare it with am pm.