Hi, When I use collectd and influxdb to monitor cluster, I have some problems: I set interval is 5 seconds, then I use tcpdump capture the package, every package interval is 15 seconds in LAN. But, Influxdb data is right. So I think collectd may be have problem. collectd config: Interval 5 tcpdump results:root@ceph-client:~# tcpdump -i eth0 src host 172.31.0.6 and port 25826 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 08:05:25.058089 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1311 08:05:40.057907 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1306 08:05:50.057899 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1323 08:06:05.057967 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1311 08:06:20.057870 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1306 08:06:30.057856 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1323 08:06:45.057703 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1334 08:07:00.057904 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1292 08:07:10.057798 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1287 08:07:25.057707 IP ceph-mon.46040 > ceph-client.25826: UDP, length 1311 Influxdb data:> select * from interface_rx where host='ceph-mon' and type='if_octets' and instance='eth0' order by desc limit 10 name: interface_rx ------------------ time host instance type value 2016-05-11T08:17:10.074142Z ceph-mon eth0 if_octets 1.0944368086e+10 2016-05-11T08:17:05.07414Z ceph-mon eth0 if_octets 1.0944363723e+10 2016-05-11T08:17:00.074123Z ceph-mon eth0 if_octets 1.0944359394e+10 2016-05-11T08:16:55.074134Z ceph-mon eth0 if_octets 1.0944353716e+10 2016-05-11T08:16:50.074211Z ceph-mon eth0 if_octets 1.0944347479e+10 2016-05-11T08:16:45.074135Z ceph-mon eth0 if_octets 1.0944342386e+10 2016-05-11T08:16:40.074129Z ceph-mon eth0 if_octets 1.0944333108e+10 2016-05-11T08:16:35.074231Z ceph-mon eth0 if_octets 1.0944327752e+10 2016-05-11T08:16:30.074122Z ceph-mon eth0 if_octets 1.094432247e+10 2016-05-11T08:16:25.074131Z ceph-mon eth0 if_octets 1.094431931e+10
Thanks.
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