#influxdb

Can a point be updated? Would it simply be overwritten if i write a new point with the same timestamp and sequence?

mgw: should be. Not sure about sequence, but I think you can ommit sequence number

so you simply can't have but one point for a given time within a series?

i'm thinking about using it as a sort of queue, but I'm not sure how to keep track of what's been processed. My other option would be to use nsq and then only write to influx after the point has been processed.

why not use the right tool for the job?

rabbit or swift or w/e

Hey!

I'm feeding influxdb with cgroups cpu data

"For each container, you will find a pseudo-file cpuacct.stat, containing the CPU usage accumulated by the processes of the containe"

so that number is growing

and the real value is the difference between two data point

how can I create graph for that ?

BaNzounet: that should be the derivative(), but I can't get it to graph

mmh, i have a weird behaviour

i am trying the collectd input plugin

i can see data when i run a simple select value from serie order desc limit 20

but when i add where time > now() - 5m, nothing

where time > '1970-01-17 00:00:00' and time < '1970-01-18 00:00:00' and i have data

time is meant to be ms, and the collectd input stores seconds

mgw: it's look like the function to use :)

Still have some problems

I'm now using cadvisor

and influxdb as db

So the data are correctly pushed and everythings

but I don't get how I can create a correct graph of cpu usage for example

I can't do a group by 1s

group by time(1s)

why is that?

BAnsounet: so you got derivative to graph?

yes

it needs a group by

jvshahid: ping :)

renchap, saw your comment on the collectd timestamps. I'll take a look at the traces you have.

dgnorton: fyi, i got the same behaviour. I hope it'll be something easy to fix :)

dgnorton: http://i.imgur.com/CdP62Nd.png

solvik, should be easy to fix

also i dont understand why i end up in the fallback with collectd 5.4

renchap, do you have Wireshark?

renchap, any chance you could give me a packet capture?

sure

renchap, you're not falling back...collectd is sending the high resolution timestamp. See the "Type: Unknown (0x0008)"? http://imgur.com/mqprItW That means high res. https://collectd.org/wiki/index.php/Binary_prot...

renchap, Not sure why you're getting seconds in InfluxDB yet...still looking.

dgnorton: ok

i am trying to get influxdb compiled, so i will be able to test

dgnorton: did you looked at https://github.com/collectd/collectd/blob/889e5... ?

renchap, no...why?

seems like its what collectd uses to transform their time format to atimestamp

#define CDTIME_T_TO_TIME_T(t) ((time_t) ((t) / 1073741824))

The original author of the influx plugin went by this https://collectd.org/wiki/index.php/High_resolu...

yup

but it may be better to trust the code :)

So, we have this in our code ... https://collectd.org/wiki/index.php/High_resolu...

oops

yeah, i have read this page

point taken about trusting the code :)

i asked on #collectd

do you want me to try with uts := p.TimeHR / 1073741824 ?