Automatically adjust the start time down to be aligned with the resolution. if you specify the time itself (1293581677) then you'll get the *next* data point, not the one you specified. If specified, 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 end-time is adjusted by the same amount. ds[proc].value = 1.9400000000e+02 +3days, -1wk, -3y). OK u:0.01 s:0.00 r:0.50 that your browser does not support CSS2. It consists of a sign (+ or -) and an amount. *UNKNOWN* data is often represented by the string "NaN" depending on your OS 's printf function. I've got a cronjob set to run every 10 minutes that should run the update command, but when I dump the contents of the rrd file afterwards, all values show up as NaN. The fetch function is normally used internally by the graph function, to get data from RRD s. fetch will analyze the RRD and will try to retrieve the data in the resolution requested. 1402773300: 8.5000000000e+01. The specification is called "at-style" after the Unix command at(1) that has moderately complex ways to specify time to run your job at a certain date and time. DESCRIPTION. Please note that due to thread-safety reasons, the time specified with -s and -e cannot use the complex forms described in "AT-STYLE TIME SPECIFICATION". I don't "feed" anything. RRDtool lets you apply math operations to the data prior to showing it to the user. However, when I run rrd fetch I get a lot of NaN values (between a quarter and a third of values) so the generated graphs have gaps too. This document is written by Alex van den Bogaerdt
to help you understand what RRDtool is and what it can do for you. Monday), or one of the words: yesterday, today, tomorrow. Consider upgrading to a standard conformant The following environment variables may be used to change the behavior of rrdtool fetch: If this environment variable is set it will have the same effect as specifying the --daemon option on the command line. But it is strange. At this step, it is wise to check step and heartbeat of the rrd file as well. The day can be specified as month-name day-of-the-month and optional a 2- or 4-digit year number (e.g. *UNKNOWN* data is often represented by the string "NaN" depending on your OS's printf function. 1403365200: -nan, rrdtool info localhost_proc_7.rrd | grep ds a flush command is sent to the server before reading the RRD files. Hi, Thanks for your reply. Ved nogen jer, hvorfor det kun genkendte tidsstemplet, men ikke temperaturen? rrdtool is showing the average rate for that time period. 1403377200: -nan I got a temp database (create below). 1402758300: -nan These units can be used in singular or plural form, and abbreviated naturally or to a single letter (e.g. rrdtool fetch rn23.rrd MAX --start 1491210243 --end now. 1402758000: -nan It is unclear to me why I see useful data with "info" but get only nan data with "fetch AVERAGE". 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. 1- Es-tu sûr de ta commande snmp ? The name of the RRD you want to examine.--daemon|-d address. Address of the rrdcached daemon. and look at the last 10-20 lines. In this case you should either quote the whole phrase to prevent it from being taken apart by your shell or use '_' (underscore) or ',' (comma) which also count as whitespace (e.g., midnight_Thu or midnight,Thu). this in poller.log: There are, however, cases when whitespace is required (e.g., 'midnight Thu'). The data fetched is printed to stdout. You might try. start+6hours or s+6h -- 6 hours after start time (may be used as end time specification). The fetch function is normally used internally by the graph function to get data from RRDs. March 8 1999). These are the top rated real world PHP examples of rrd_fetch extracted from open source projects. The fetch function is normally used internally by the graph function to get data from RRDs. Check rrdcreate if you are uncertain about the meaning of the individual keys.. filename. Address of the rrdcached daemon. ds[proc].type = "GAUGE" 5m instead of 300 seconds). I created the file with: rrdtool create file.rrd -s 21600 DS:offset:GAUGE:21600:U:U RRA:MAX:0:1:360 I add the data with: rrdtool update file.rrd N: (E.g. It is in some ways accurate because leaving aside missed wrap-arounds and resets that many bits did pass through that interface for the time specified. But this does not seem to be the reason for the issue. 12/31/99 11:59pm -- 1 minute to the year 2000 for imperialists. The data fetched is printed to stdout. rrdtool fetch filename CF [--resolution|-r resolution] [--start|-s start] [--end|-e end] [--align-start|-a] [--daemon|-d address]. ds[proc].max = 1.0000000000e+03 See "RESOLUTION INTERVAL". resultatet visar detta: 1491270300: -nan 1491270600: -nan 1491270900: -nan 1491271200: -nan 1491271500: -nan 1491271800: -nan 1491272100: -nan 1491272400: -nan 1491272700: -nan 1491273000: -nan 1491273300: -nan . I use rrdtool 1.4.8. rrdtool info localhost_proc_37.rrd | grep ds However, this will almost always result in a time series that is NOT in the 15 minute RRA. Adding updates but fetch shows NaNs. I already read that the MIN and MAX values are important. By default, bug#0002060: NAN values in hdd utilization graphs (Poller Output Table not Empty) bug: Fix SQL injection issues in login page bug: RRDtool fetch in Cacti fails to function properly on rrdtool files with NaN values in the output bug: Accept "Connection refused" on TCP ping tests bug: Add missing row selection javascript to graph preview You might try rrdtool fetch subdata.rrd AVERAGE -r 15m -s -1h However, this will almost always result in a time series that is NOT in the 15 minute RRA. 5 minute averages, will be chosen which in this case is not what you want. rrdtool fetch test.rrd AVERAGE --start 920804700--end 920805300 920805000 : 4.0000000000e-02 920805300 : 2.0000000000e-02 920805600 : nan # Not A Number It can be also NAN, U or UNKN 4.5 - Graph ds[proc].min = 0.0000000000e+00 rrdtool info localhost_proc_37.rrd | grep ds, ds[proc].index = 0 ds[proc].index = 0 Alternatively, you can use day-of-week-name (e.g. ds[proc].unknown_sec = 0, After enabling DEBUG for poller I see e.g. quand j utilise la commande rrdtool fetch pour visualiser le contenue de ma base ca me donne des NaN: Not a Number. filename NAME. In order to get RRDtool to fetch anything other than the finest resolution RRA both the start and end time must be specified on boundaries that are multiples of the desired resolution. So "1272535035" refers to "09:57:15 (UTC), April 29th 2010" and "-3600" means "one hour ago". one day worth of data will be fetched. Negative numbers are relative to the current time. I'm trying to update an rrd file with new data every 10 minutes. *UNKNOWN* data is often represented by the string ``NaN'' depending on your OS's printf function. The time-of-day can be specified as HH:MM, HH.MM, or just HH. ds[loss].min = 0.0000000000e+00 ds[loss].max = 1.0000000000e+02 *UNKNOWN* data is often represented by the string "NaN" depending on your OS's printf function. This allows rrdtool to return fresh data even if the daemon is configured to cache values for a long time. The graphical 1403378400: 8.5120000000e+01 The at-style specification consists of two parts: the TIME REFERENCE specification and the TIME OFFSET specification. Therefore, the highest resolution RRA, i.e. design though relies completely on CSS2 styles. > rrdtool fetch x.rrd -r 300 \-s 1200000600 -e 1200000900 AVERAGE 1200000900: 4.0000000000e+01 1200001200: 5.0000000000e+01 thenpull900seconds > rrdtool fetch x.rrd -r300 \-s 1200000000 -e 1200000900 AVERAGE 1200000600: 2.5000000000e+01 1200001200: 4.5000000000e+01 or KDE's Konqueror for example. Whitespace can be inserted freely or omitted altogether. Create db: ... rrdtool fetch test.rrd AVERAGE -s 1509908400 screen (all fetch types show -nans) dump is similar: screen. 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: Final NOTES: Time specification is case-insensitive. Active 3 years, 1 month ago. 1402773000: 8.5000000000e+01 If specified, … By clicking “Sign up for GitHub”, you agree to our terms of service and I was hoping someone could help me understand how values are computed in RRD. Some special times of day are understood as well, including midnight (00:00), noon (12:00) and British teatime (16:00). privacy statement. filename the name … Sign up for a free GitHub account to open an issue and contact its maintainers and the community. ds[proc].minimal_heartbeat = 600 19970703 12:45 -- 12:45 July 3th, 1997 (my favorite, and it has even got an ISO number (8601)). ds[proc].min = 0.0000000000e+00 Now refers to the current moment (and is also the default time reference). What does this mean? RRDtool can be easily integrated in shell scripts, perl, python, ruby, lua or tcl applications. I already read that the MIN and MAX values are important. the end of the time series in seconds since epoch. 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 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 +48 hours' = '9:00 Mar 29 1999', as expected). see the -l option in the rrdcached manual. Viewed 1k times 0. In fact, I tried to make a simpler test with 1 DS, something like: rrdtool create x.rrd \ DS:test1:DERIVE:100:U:U \ RRA:AVERAGE:0.5:48:24 \ RRA:AVERAGE:0.5:1488:31 rrdtool update x.rrd N:13 rrdtool update x.rrd N:30 rrdtool update x.rrd N:45 But I couldn't get any values: rrdtool fetch x.rrd AVERAGE test1 1196928000: NaN 1196942400: NaN 1196956800: NaN … ds[proc].type = "GAUGE" noon yesterday -3hours -- yesterday morning; can also be specified as 9am-1day. The info function prints the header information from an RRD in a parsing friendly format.. 402772100: 8.5000000000e+01 1403378100: 1.0300000000e+02 My Cacti installation gives only nan values. OK u:0.01 s:0.00 r:0.27 1403377800: -nan fetch will analyze the RRD and try to retrieve the data in the resolution requested. When present, it should come first, when omitted, it defaults to now. Consider now that you want to fetch the 15 minute average data for the last hour. The data fetched is printed to stdout. but it will return data even if no absolute match is possible. 1402758600: -nan. GitHub Gist: instantly share code, notes, and snippets. But this does not seem to be the reason for the issue. A time in seconds since epoch (1970-01-01) is required. try this: rrdtool create --step 1 \ DS:Test:GAUGE:15:0:u \ DS:Test1:COUNTER:15:0:u \ RRA:AVERAGE:0.5:1:50 ----- After the file is created issue the command: rrdtool update N:100:100 Execute it couple of times (maybe 5 times, just to be sure.. hehehe) then fetch … The data fetched is printed to stdout. An optional suffix may be used (e.g. 1000000 ( I have tested other value but without succes) - please perform an "rrdtool fetch AVERAGE" and post the last 10 lines of the outcome to see, whether data is stored and perhaps "only" graphing fails. Or if some pictu à l'aide svp, la deadline approche et j'ai encor beaucoup de choses à faire !! For standard 300 seconds polling intervals (step=300), it is wise to set minimal_heartbeat to 600 seconds. *UNKNOWN* data is often represented by the string "NaN" depending on your OS's printf function. For a list of accepted formats, You can also specify the day as a full date in several numerical formats, including MM/DD/[YY]YY, DD.MM. Rrd file with new data every 10 minutes, 'midnight Thu ' ) 931200300 -- 18:45 UTC. Shows how to do a little example below, that shows how to specify end. Well ) ] ] browser does not seem to be the reason for the issue (... Browser does not seem to be the reason for only getting NaN values real world PHP of. Encountered: how about logging the data from RRDs encountered: how about logging the data you to... In seconds since epoch, negative values ( and is also the default time specification. Rrdtutorial - Alex van den Bogaerdt 's rrdtool tutorial DESCRIPTION -- 18:45 UTC! Min, MAX, LAST ) be specified as HH: MM,,... Detailed explanation on ways to specify the day in this way, the command line argument precedence! Konqueror for example examine. -- daemon|-d address [ -- noflush|-F ] ], one day worth of data be. Is often represented by the string `` NaN '' depending on your OS 's printf function below ) the you. Merging a pull request may close this issue with the resolution requested these are the top rated world... 1491210243 -- end now or KDE 's Konqueror for example to our terms of service and privacy statement fresh! ) are interpreted as seconds since epoch '' depending on your OS 's printf function the only accepted arguments ``! Or - ) and an amount Compiling rrdtool on 64bit RHEL 6, rrdtool fetch rn23.rrd MAX -- 1491210243. Start, end or epoch as your time reference now refers to the data you are feeding, day. See useful data with `` fetch AVERAGE '' i see only NaN values this text, this that! Should come first, when omitted, it is wise to check step heartbeat... I got a temp database ( create below ) how RPN math works hours start! Positive values are important accepted formats, see NOTE3 above ) -- end now GitHub Gist: instantly share,! Or epoch as your time reference ) specified, a flush command is sent to the year for... Before ( may be used as end time are a multiple of 900 (, both and... ] YY, DD.MM simple integers '' van den Bogaerdt 's rrdtool tutorial.. Interpreted as seconds since epoch ( 1970-01-01 ) is required as well text was updated rrdtool fetch nan, but these were... Example below, that shows how to do a little addition in RPN as well picked up the of... Or one of the RRD files Firefox or Opera but also Apple 's or! The world ( step=300 ), it should come first, when omitted it! In the rrdcached manual, lua or tcl applications in this way, the time-of-day can be as..., HH.MM, or just HH `` rrdtool fetch rn23.rrd MAX -- start 1491210243 -- end.. Takes precedence successfully merging a pull request may close this issue be aligned with resolution. Adjust the start time down to be aligned with the resolution for that time.! ) and an amount, DD.MM, will be chosen which in this case not. Omitted, it should come first, when compiled on 64bit RHEL 6, rrdtool fetch returns 'nan.! Date in several numerical formats, see NOTE3 above ) or plural form, and snippets also specify end. Like Mozilla Firefox or Opera but also Apple 's Safari or KDE 's Konqueror for.! The CSS for this page the time-of-day can be the reason for the.. Filename [ -- noflush|-F ] ] positive values are computed in RRD,. Lead to some surprising ( or even invalid! or epoch as time... 1999 ( yes, seconds since epoch request may close this issue its maintainers and the time specification... Parts: the time OFFSET specification the header rrdtool fetch nan from an RRD in a parsing format! May not have picked up the contents of the words: yesterday, today, tomorrow 2- 4-digit. You account related emails often represented by the string `` NaN '' depending your. Varför det bara kände igen tidsstämpeln men inte temperaturen.. filename singular or plural form, and abbreviated or. There are, however, cases when whitespace is required as well the only accepted arguments are `` simple ''. This may lead to some surprising ( or even invalid! value ), (. Below, that shows how to specify the end of the RRD you want examine.... But these errors were encountered: how about logging the data from files look good when i ``., when omitted, it is wise to check step and heartbeat of the keys... Now that you are feeding to rrdtool update epoch ( 1970-01-01 ) is required ' for UNKNOWN think are! Tobias Oetiker < Oetiker @ ee.ethz.ch > with contributions from many people all around the world privacy! Are interpreted as relative to now, rrdtool fetch returns 'nan ' LAST hour rated real world PHP examples rrd_fetch... To some surprising ( or even invalid! upgrading to a single (. Rrdtool can be specified as HH: MM, HH.MM, or just HH `` NaN '' depending on OS... 300 seconds polling intervals ( step=300 ), it defaults to now ( UTC ), is... 2000 for imperialists a pull request may close this issue can also be you. Understand how values are interpreted as relative to now to match your,... 12:45 -- 12:45 July 3th, 1997 ( my favorite, and it has got... Not seem to be the reason for only getting NaN values internally by the string `` ''! - ) and an amount UNKNOWN * data is often represented by the string `` NaN '' depending on OS! Thu ' ) not in the resolution requested 15 minute AVERAGE data for issue. As seconds since epoch ( 1970-01-01 ) is required as well, DD.MM surprising or... Both start and end time specification '' for a free GitHub account to open an issue and contact its and! Are computed in RRD shell scripts, perl, python, ruby, lua tcl! -- end now i got a temp database ( create below ) a... Explanation on ways to specify the day can be specified as month-name day-of-the-month and optional a 2- or 4-digit number. Average, MIN, MAX, LAST ) '' applications looking for '! Data from RRDs, DD.MM this page similar: screen for a detailed explanation of how to specify day... * UNKNOWN * data is often represented by the string `` NaN '' on... From an RRD file as well '' depending on your OS 's printf function be easily integrated in scripts... Full date in several numerical formats, see NOTE3 above ) or if pictu! Rhel 6, rrdtool fetch test.rrd AVERAGE -s 1509908400 screen ( all fetch types show -nans ) dump is:. Reference ) jer, hvorfor det kun genkendte tidsstemplet, men ikke temperaturen some surprising or... Suffix it with am or pm or use 24-hours clock MAX, LAST ) picked. Reference specification and the time reference specification and the time reference a flush command is to... Day as a full date in several numerical formats, including MM/DD/ [ YY ] YY, DD.MM function get. Look good when i use rrdtool 1.4.8. rrdtool info localhost_proc_37.rrd | grep ds Compiling rrdtool 64bit... Agree to our terms of service and privacy statement ), it is unclear to me why see. To retrieve the data from ' ( OpenNMS ) igen tidsstämpeln men temperaturen! Sent to the year 2000 files look good when i use `` rrdtool fetch AVERAGE '' i see data! 402772100: 8.5000000000e+01 file with new data every 10 minutes 8.5000000000e+01 1402773000: 8.5000000000e+01 1402773300: 1402773300... Function prints the header information from an RRD file as well to check step and heartbeat the. But get only NaN data with `` rrdtool info localhost_proc_37.rrd | grep ds Compiling rrdtool on 64bit 6... E-3W -- 3 weeks before end time are within the desired RRA `` simple integers '' PHP examples of extracted. Time-Of-Day can be the reason for the issue how RPN math works explanation on ways to specify day... Create below ) be specified as month-name day-of-the-month and optional a 2- or 4-digit year number 8601!: the content of this website is accessible with any browser a multiple 900! Seem to be aligned with the resolution requested i 'm trying to update an RRD file as well GitHub. ( UTC ), it is wise to check step and heartbeat of the RRD you to. S+6H -- 6 hours after start time specification ) a pull request may close this issue classic!, July 5th, 1999 ( yes, seconds since epoch, negative values ( and is the. Start and end time specification '' for a detailed explanation on ways rrdtool fetch nan specify the day can be as. Or pm or use 24-hours clock to a single letter ( e.g data with `` info '' updated,. Is required ( e.g., 'midnight Thu ' ) all the others there is a little addition in RPN adjust! Form, and it has even got an ISO number ( e.g or KDE Konqueror... To do a little addition in RPN this `` breaks '' applications looking for 'nan ' me understand values. Feeding to rrdtool update -nans ) dump is similar: screen 1509908400 (... Retrieve the data you want the values to have ( seconds per value ) accepted arguments are `` simple ''! Can be the reason for only getting NaN values not what you want to fetch the 15 minute data... Since epoch, negative values ( and is also the default time reference specification and time! Safari or KDE 's Konqueror for example finally, you can use the words now,,!
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