Graphite SNMP 计数器转换
Thi*_*his 4 networking snmp collectd graphite
我正在使用石墨版本 0.9.10 来读取ifHCInOctetsand ifHCOutOctets，我正在使用和插件进行轮询；我使用的是5.1.0 版。collectd snmpgraphite_writecollectd
数据毫无问题地到达石墨；但是，我想以每秒位数表示。为了测试我的统计数据是否正确，我开始了 CD iso 下载并观察了下载速率……它在 1.0Mbps 和 2.0Mbps 之间变化。
常识告诉您，您需要将八位字节计数器乘以 8 才能得到位；但是，似乎我需要除以 8 才能正确显示石墨。
当我乘以 0.125 比例因子时scale(scaleToSeconds(nonNegativeDerivative(<SERIES>), 60),0.125)，公式正确转换为每秒位数，我看到 1Mpbs 和 2Mbps 之间的数字......
当我乘以 8.0 比例因子时scale(scaleToSeconds(nonNegativeDerivative(<SERIES>), 60),8)，结果显然是错误的……图表峰值为 120Mbps。我知道这是错误的，因为这是一个具有 5M 上限的住宅电缆调制解调器。
问题：如果我将八位字节发送到石墨，为什么会scale(<foo>, 8)产生不正确的结果？
/opt/collectd/etc/collectd.conf
LoadPlugin syslog
LoadPlugin cpu
LoadPlugin interface
LoadPlugin load
LoadPlugin memory
LoadPlugin network
LoadPlugin snmp
LoadPlugin write_graphite
<Plugin snmp>
<Data "std_traffic">
Type "if_octets"
Table true
Instance "IF-MIB::ifName"
Values "IF-MIB::ifHCInOctets" "IF-MIB::ifHCOutOctets"
</Data>
<Host "fw.pennington.net">
Address "172.16.1.1"
Version 2
Community "public"
Collect "std_traffic"
Interval 60
</Host>
</Plugin>
<Plugin write_graphite>
<Carbon>
Host "localhost"
Port "2003"
Prefix ""
Postfix ""
StoreRates false
AlwaysAppendDS false
EscapeCharacter "_"
</Carbon>
</Plugin>
/opt/graphite/conf/storage-schema.conf:
[carbon]
pattern = ^carbon\.
retentions = 60s:90d
[default]
pattern = .*
retentions = 60s:1w, 5m:1y
/opt/graphite/conf/carbon.conf:
[cache]
USER = carbon
MAX_CACHE_SIZE = inf
MAX_UPDATES_PER_SECOND = 500
MAX_CREATES_PER_MINUTE = 50
LINE_RECEIVER_INTERFACE = 0.0.0.0
LINE_RECEIVER_PORT = 2003
ENABLE_UDP_LISTENER = False
UDP_RECEIVER_INTERFACE = 0.0.0.0
UDP_RECEIVER_PORT = 2003
PICKLE_RECEIVER_INTERFACE = 0.0.0.0
PICKLE_RECEIVER_PORT = 2004
USE_INSECURE_UNPICKLER = False
CACHE_QUERY_INTERFACE = 0.0.0.0
CACHE_QUERY_PORT = 7002
USE_FLOW_CONTROL = True
LOG_UPDATES = False
WHISPER_AUTOFLUSH = False
[relay]
LINE_RECEIVER_INTERFACE = 0.0.0.0
LINE_RECEIVER_PORT = 2013
PICKLE_RECEIVER_INTERFACE = 0.0.0.0
PICKLE_RECEIVER_PORT = 2014
RELAY_METHOD = rules
REPLICATION_FACTOR = 1
DESTINATIONS = 127.0.0.1:2004
MAX_DATAPOINTS_PER_MESSAGE = 500
MAX_QUEUE_SIZE = 10000
USE_FLOW_CONTROL = True
[aggregator]
LINE_RECEIVER_INTERFACE = 0.0.0.0
LINE_RECEIVER_PORT = 2023
PICKLE_RECEIVER_INTERFACE = 0.0.0.0
PICKLE_RECEIVER_PORT = 2024
DESTINATIONS = 127.0.0.1:2004
REPLICATION_FACTOR = 1
MAX_QUEUE_SIZE = 10000
USE_FLOW_CONTROL = True
MAX_DATAPOINTS_PER_MESSAGE = 500
MAX_AGGREGATION_INTERVALS = 5
输出来自 whisper-fetch.py
root@tsunami:/opt/graphite/conf# python /usr/local/bin/whisper-fetch.py --pretty /opt/graphite/storage/whisper/fw_pennington_net/snmp/if_octets-Ethernet0_0/rx.wsp
Mon Sep 10 02:53:00 2012 110454375894.000000
...
Tue Sep 11 02:50:00 2012 110532796093.000000
Tue Sep 11 02:51:00 2012 110532819931.000000 <------------ Correct
Tue Sep 11 02:52:00 2012 None
root@tsunami:/opt/graphite/conf#
输出来自 show interface eth0/0
mpenning-fw# sh int eth0/0
Interface Ethernet0/0 "", is up, line protocol is up
Hardware is 88E6095, BW 100 Mbps, DLY 100 usec
Auto-Duplex(Full-duplex), Auto-Speed(100 Mbps)
Description: TIME WARNER 5Mbps circuit
Available but not configured via nameif
MAC address 0019.0726.4a39, MTU not set
IP address unassigned
157040376 packets input, 110532814004 bytes, 0 no buffer
^^^^^^^^^^^^^^^^^^
Received 68921847 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 L2 decode drops
8589974681 switch ingress policy drops
57851429 packets output, 8036229250 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collisions, 0 deferred
0 lost carrier, 0 no carrier
0 rate limit drops
0 switch egress policy drops
mpenning-fw#