added more information to README.md
Costa Tsaousis (ktsaou) committed
Mar 11, 2017 at 12:30 UTC
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README.md
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-# netdata [](https://travis-ci.org/firehol/netdata) [](https://scan.coverity.com/projects/firehol-netdata) [](https://www.codacy.com/app/netdata/netdata?utm_source=github.com&utm_medium=referral&utm_content=firehol/netdata&utm_campaign=Badge_Grade) [](https://codeclimate.com/github/firehol/netdata) [](https://hub.docker.com/r/titpetric/netdata/) [](https://twitter.com/linuxnetdata)
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+# netdata [](https://travis-ci.org/firehol/netdata) [](https://scan.coverity.com/projects/firehol-netdata) [](https://www.codacy.com/app/netdata/netdata?utm_source=github.com&utm_medium=referral&utm_content=firehol/netdata&utm_campaign=Badge_Grade) [](https://codeclimate.com/github/firehol/netdata)
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> *New to netdata? Here is a live demo: [http://my-netdata.io](http://my-netdata.io)*
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**netdata** is a system for **distributed real-time performance and health monitoring**.
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(**physical** & **virtual** servers, **containers**, **IoT** devices), without
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disrupting their core function._
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+netdata runs on **Linux**, **FreeBSD**, and **MacOS**.
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+
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+[](https://twitter.com/linuxnetdata)
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+
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---
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## User base
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*Since May 16th 2016 (the date the [global public netdata registry](https://github.com/firehol/netdata/wiki/mynetdata-menu-item) was released):*<br/>
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-[](https://registry.my-netdata.io/#menu_netdata_submenu_registry) [](https://registry.my-netdata.io/#menu_netdata_submenu_registry) [](https://registry.my-netdata.io/#menu_netdata_submenu_registry)
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+[](https://registry.my-netdata.io/#menu_netdata_submenu_registry) [](https://registry.my-netdata.io/#menu_netdata_submenu_registry) [](https://registry.my-netdata.io/#menu_netdata_submenu_registry) [](https://hub.docker.com/r/titpetric/netdata/)
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*in the last 24 hours:*<br/>
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[](https://registry.my-netdata.io/#menu_netdata_submenu_registry) [](https://registry.my-netdata.io/#menu_netdata_submenu_registry) [](https://registry.my-netdata.io/#menu_netdata_submenu_registry)
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- **scales to infinity**<br/>
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requiring minimal central resources
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- - **back-ends supported**<br/>
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- can archive its metrics on `graphite` or `opentsdb`, in the same or lower detail
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+ - **several operating modes**<br/>
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+ autonomous host monitoring, headless data collector, forwarding proxy, store and forward proxy, central multi-host monitoring, in all possible configurations.
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+ Each node may have different metrics retention policy and run with or without health monitoring.
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+
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+ - **time-series back-ends supported**<br/>
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+ can archive its metrics on `graphite`, `opentsdb`, `prometheus`, json document DBs, in the same or lower detail
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(lower: to prevent it from congesting these servers due to the amount of data collected)
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@@ -99,7 +107,7 @@ Netdata is featured at <b><a href="https://octoverse.github.com/" target="_blank
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## What does it monitor?
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-netdata monitors several thousands of metrics per device.
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+netdata collects several thousands of metrics per device.
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All these metrics are collected and visualized in real-time.
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> _Almost all metrics are auto-detected, without any configuration._
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This is a list of what it currently monitors:
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- **CPU**<br/>
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- usage, interrupts, softirqs, frequency, total and per core
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+ usage, interrupts, softirqs, frequency, total and per core, CPU states
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- **Memory**<br/>
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RAM, swap and kernel memory usage, KSM (Kernel Samepage Merging), NUMA
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- **Disks**<br/>
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- per disk: I/O, operations, backlog, utilization, space
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+ per disk: I/O, operations, backlog, utilization, space, software RAID (md)
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- **Tomcat**<br/>
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accesses, threads, free memory, volume
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+- **web server log files**<br/>
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+ extracting in real-time, web server performance metrics and applying several health checks
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+
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- **mySQL databases**<br/>
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multiple servers, each showing: bandwidth, queries/s, handlers, locks, issues,
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tmp operations, connections, binlog metrics, threads, innodb metrics, and more
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- **Redis databases**<br/>
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multiple servers, each showing: operations, hit rate, memory, keys, clients, slaves
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+- **mongodb**<br/>
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+ operations, clients, transactions, cursors, connections, asserts, locks, etc
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+
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- **memcached databases**<br/>
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multiple servers, each showing: bandwidth, connections, items
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+- **elasticsearch**<br/>
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+ search and index performance, latency, timings, cluster statistics, threads statistics, etc
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+
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- **ISC Bind name servers**<br/>
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multiple servers, each showing: clients, requests, queries, updates, failures and several per view metrics
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+- **NSD name servers**<br/>
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+ queries, zones, protocols, query types, transfers, etc.
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+
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- **Postfix email servers**<br/>
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message queue (entries, size)
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- **Dovecot** POP3/IMAP servers<br/>
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+- **ISC dhcpd**<br/>
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+ pools utilization, leases, etc.
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+
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- **IPFS**<br/>
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bandwidth, peers
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- **Squid proxy servers**<br/>
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multiple servers, each showing: clients bandwidth and requests, servers bandwidth and requests
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+- **HAproxy**<br/>
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+ bandwidth, sessions, backends, etc
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+
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+- **varnish**<br/>
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+ threads, sessions, hits, objects, backends, etc
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+
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+- **OpenVPN**<br/>
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+ status per tunnel
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+
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- **Hardware sensors**<br/>
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- temperature, voltage, fans, power, humidity
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+ `lm_sensors` and `IPMI`: temperature, voltage, fans, power, humidity
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- **NUT and APC UPSes**<br/>
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load, charge, battery voltage, temperature, utility metrics, output metrics
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- **hddtemp**<br/>
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disk temperatures
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+- **smartd**<br/>
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+ disk S.M.A.R.T. values
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+
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- **SNMP devices**<br/>
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can be monitored too (although you will need to configure these)
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