{"id":102,"date":"2009-10-21T14:35:00","date_gmt":"2009-10-21T14:35:00","guid":{"rendered":"http:\/\/antynet.pl\/index.php\/2009\/10\/21\/linux-rrdtool\/"},"modified":"2009-10-21T14:35:00","modified_gmt":"2009-10-21T14:35:00","slug":"linux-rrdtool","status":"publish","type":"post","link":"https:\/\/www.antynet.pl\/index.php\/2009\/10\/21\/linux-rrdtool\/","title":{"rendered":"LINUX RRDTOOL"},"content":{"rendered":"

describe database creation<\/span>:
rrdtool create base.rrd -s 240 \\
DS:DS-NAME:GAUGE | COUNTER | DERIVE | ABSOLUTE<\/i>:HEARTBEAT:0:U \\
RRA:CF:XFF:3:840
-s # step default is 300 sec
DS # DATA SOURCE
DS-NAME # variable name
RRA # ROUND ROBIN ARCHIVE – one archive in database
CF # CONSOLIDATION FUNCTION – MAX | MIN | AVERAGE | LAST
PDP # PRIMARY DATA POINT
XFF # XFILES FACTOR – factor, from 0 to 1 describe how many PDP can be   UNKNOWN before record will be write to database as UNKNOWN<\/p>\n

example:<\/span>
rrdtool create base.rrd -s 240 \\
DS:input:COUNTER:600:0:U \\
RRA:AVERAGE:0.5:3:840<\/p>\n

base.rrd #database file
-s 240<\/span> #record step in database are set to 240 sec
input #data chain name
COUNTER<\/span> #counter type
(COUNTER – best for increasing values as network interfaces counters, you take into account that interface network counters is roll back when achieve top value 232<\/sup> or 2 64<\/sup> and start from zero value
GAUGE – best for non increasing values)<\/p>\n

example of counting data:<\/b>
value of first probe = 100
value of second probe = 150
value of third probe = 180<\/p>\n

for counter type – COUNTER
will be calculate difference 150-100=50 and 180-150=30
then depends on RRA<\/span> ( AVERAGE<\/span>, MAX<\/span>, MIN<\/span> or LAST<\/span>),
values will be:
for AVERAGE=(50+30)\/2=40,
for MAX=50,
for MIN=30,
for LAST=30<\/p>\n

for counter type – GAUGE
will not be calculate difference
then depends on RRA
for AVERAGE= (100+150+180)\/3=143,
for MAX=180,
for MIN=100,
for LAST=180<\/p>\n

600<\/span> #600 sec, between each probe before probe will be marked as UNKNOWN,
0<\/span> #minimal value
U<\/span> #maximal value „U” is UNKNOWN
0.5<\/span> #ratio of UNKNOWN probes 0-1, 0.5 means 50%
3<\/span> #result of CF function will be get from 3 probes but 50% from them can be UNKNOWN
840<\/span> #maximal amount of probes which can be store in database (amount of records), you can not resize database file so it must be set at startup.<\/p>\n

let’s calculate how many probes should be store in our database during week:<\/i><\/p>\n

from previous settings we assume that value is generated from 3 probes which are collected every 240 sec
3*240=720 sec.
so final value will be store in database every 720 sec
720\/60=12 min.
means that every value in our html chart will be refresh every 12 min. <\/p>\n

3600\/720=5 probes per hour
24*3600\/720=120 probes per day,
7*24*3600\/720=840 probes per week<\/p>\n

other:<\/b>
rrdtool dump [baza.rrd] [plik.xml] #export database to xml file
rrdtool fetch [baza.rrd] AVERAGE -s -6[min | h] #get records from last 6 min | hour.<\/p>\n","protected":false},"excerpt":{"rendered":"

describe database creation:rrdtool create base.rrd -s 240 \\DS:DS-NAME:GAUGE | COUNTER | DERIVE | ABSOLUTE:HEARTBEAT:0:U \\RRA:CF:XFF:3:840-s # step default is 300 secDS # DATA SOURCEDS-NAME # variable nameRRA # ROUND ROBIN ARCHIVE – one archive in databaseCF # CONSOLIDATION FUNCTION – MAX | MIN | AVERAGE | LASTPDP # PRIMARY DATA POINTXFF # XFILES FACTOR – […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1],"tags":[19],"class_list":["post-102","post","type-post","status-publish","format-standard","hentry","category-bez-kategorii","tag-linux-rrdtool"],"_links":{"self":[{"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/posts\/102","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/comments?post=102"}],"version-history":[{"count":0,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/posts\/102\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/media?parent=102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/categories?post=102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/tags?post=102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}