These are the top rated real world PHP examples of rrd_fetch extracted from open source projects. Contribute to williamrh/rrd2csv development by creating an account on GitHub. code for handling the data requests from graph, xport and fetch. hope that mktime(3) will take care of this later). The time-of-day can be specified as HH:MM , HH .MM, or just HH . right after the + or - sign) the meaning of m is guessed from the number it directly follows. The CF. Now refers to the current moment (and is also the Easily Export RRD files into the CSV format. See also 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. +3days, -1wk, -3y). A time in seconds since epoch (1970-01-01) is required. (AVERAGE,MIN,MAX,LAST) from RRDs. 12/31/99 11:59pm -- 1 minute to the year 2000 for imperialists. Check rrdfetch. British teatime (16:00). Some special times of day are understood as well, including midnight (00:00), noon (12:00) and But I cannot file any similarities if I compare it with the data of log file (the graphs are same). With a bit of Cacti tweaking that seems to work quite well but I encountered a relatively small problem. Use code METACPAN10 at checkout to apply your discount. MMDD[YY]YY) combined together (e.g., -5mon1w2d), as well as several time offsets can be 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. interval to (from) the time reference moment. 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). minutes, and seconds it means minutes. (NOTE1: this is different from the original at(1) behavior, which interprets a single-number date as rrdtool info says the DS got known values for the last two columns (ext_temperature, ext_humidity). rrdtool fetch filename CF [--resolution|-r resolution] [--start|-s start] Check rrdrestore fetch Get data for a certain time period from a RRD. -1month or -1m -- current time of day, only a month before (may yield surprises, see NOTE3 above). 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 Graph available for download also didnt not show any info, with script to check provided. This may lead to some surprising (or even invalid!) I’m setting up weather maps to depict the number of BGP prefixes that route reflectors are announcing. *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs printf function. Time in seconds since epoch. concatenated (e.g., -5h45min = -5h-45min = -6h+15min = -7h+1h30m-15min, SPECIFICATION section for a detailed explanation of how to specify end time. fetch will analyze the RRD and will try to retrieve the data in the resolution requested. Currently, if the number Check rrdtune. Consider now that you want to fetch the 15 minute average data for the last hour. for fetched is printed to stdout. is m. To disambiguate, the parser tries to read your mind :) for minutes). This function has same result as rrd_graph (), but fetched data are returned as array, no image file is … So, here is the first RRA: RRA:AVERAGE:0.5:1:288. The few special times of day are understood as well, or to a single letter (e.g. Yet when I do a graph/fetch, I'm getting NaNs for the last two columns. 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. See the rrdtool fetch manual page for details. DST forward clock adjustment, see the below example). 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 (+ or -) and amount. [--end|-e end]. when should the data begin. rrdfetch will try to match your request, but it will return data even if no absolute Month and day of the week names can be used in their naturally abbreviated form (e.g., Dec for December, Sun for Sunday, etc.). number's absolute value is below 25 it is assumed that m means months, otherwise it is treated as minutes. 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. Start (end) can be used to specify a time relative to the start (end) time for those tools that use these categories moment in time (for time offset to be applied to). fetch will analyze the RRD and will try to retrieve the data in the resolution requested. Consider now that you want to fetch the 15 minute average data for the last hour. 931225537 -- 18:45 July 5th, 1999 (yes, seconds since 1970 are valid as well). Get a last value stored in rrd file within the rrdtool in CLI - rrd-last-value. +48 hours' = '9:00 Mar 29 1999', as expected). teatime (16:00). Thanks, RRDtool will try to give you the best available data, but e.g. TIME long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock adjustments take place). dizeee / rrd-last-value. *UNKNOWN* data is often represented by the string ``NaN'' depending on your OSs months, or years as your time offset units your time reference date is last, lastupdate, first, info, fetch, tune, resize, xport RRDtool is distributed under the Terms of the GNU General Public License Version 2. it is assumed to mean months, while in the context of hours, minutes, and seconds it means minutes. adjustments take place). Just create another RRA in your RRD, with the CF you desire. 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. YYYYMMDD . with the time offset that may vary depending on you time reference, because Several time units can be Alternatively, you can use day-of-week-name (e.g. 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 day can be specified as month-name day-of-the-month and optional a 2- or 4-digit year number (e.g. The following time units can be used to specify the amount: years, months, weeks, days, 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. I love this ...), --resolution|-r resolution (default is the highest resolution). (after mktime(3) normalization); in the The 23 thoughts on “ PHP RRDTool tutorial ” passerby December 9, 2006 at 4:50 pm. Our RRD will include 2 RRA — for last 24 hours and last 31 day. The last value is the average of the two measurements 66.7 and 68.2. 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. specification is called ``at-style'' after Unix command at(1) The data fetched is printed to stdout. By default one day worth of data will be fetched. start, end can be abbreviated to n, s, e. Time offset specification is used to add (or subtract) certain time 19970703 12:45 -- 12:45 July 3th, 1997 (my favorite, and its even got an ISO number (8601)). The words now, Finally, you can use the words now, start, or end as your time reference. March 8 1999). results, e.g. In this case you should either quote the whole phrase to prevent it from represented by the string "NaN" depending on your OS 's printf function. PHP rrd_fetch - 13 examples found. '8:00 Mar 27 1999 +48 hours' = '9:00 Mar 29 1999', as expected). ), NOTE3: If you specify time offset in days, weeks, months, or years, you will end 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. Monday), or one of the words: yesterday, today, tomorrow. When present, it should these include midnight (00:00), noon (12:00) and British while +24m == +24 months). right after the) years, months, weeks, or days You might try rrdtool fetch subdata.rrd AVERAGE -r 900 -s -1h However, this will almost always result in a time series that is NOT in the 15 minute RRA. You can also specify day as a full date in several numerical formats; these include: MM/DD/[YY]YY, DD.MM. NOTE2 : if you specify the day in this way, the time-of-day is REQUIRED as well. first Find the first update time of an RRD. is 28 to 31 days long, and even 1 day may be not equal to 24 hours twice a year, when DST-related clock Development note: The current implementation fetches all values from the RRA in one swoop and caches them in memory. 'May 31 -1month' = 'Apr 31' end-3weeks or e-3w -- 3 weeks before end time (may be used as start time specification). The data rrdtool fetch
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