Cluster load

A cluster in VMmanager is a group of physical servers where virtual machines are running.

Navigate to Statistics→ Cluster load.

Generate a report

Period — select a period:
- previous day;
- current day;
- current week;
- current month;
- current year;
- previous week
- previous month;
- previous year;
- week;
- month;
- quarter;
- half-a-year;
- year;
- any period;
- the whole period.
Cluster nodes — select a cluster node to display the statistics.

Statistics is collected for the following parameters

outgoing traffic, GiB;
incoming traffic, GiB;
CPU, %;
IOPS;
RAM, %.
average system load;

Note

Per-minute statistics is kept for 5 days. Per-hour statistics is kept for one month and 3 days. Per-day statistics is kept for 2 years. When the specified periods expire, the data will be deleted.

Graphs for a random period are generated based on a per-hour statistics.

How statistics is collcted

Raw statistics is kept in the /usr/local/mgr5/var/stat/raw file and is updated every 5 minutes. Once an hour the control panel handles the raw statistics and delete it from the directory. The archive of the raw statistics is kept in /usr/local/mgr5/var/stat/mon/mainstat/.

Note

You can delete the archive of raw statistics only by means of the operating system.

Incoming and outgoing traffic

The information is taken from the /proc/net/dev file.Statistics files are copied to /var/stat/raw_bandwidth.

Receive Bytes — incoming traffic.

Transmit Bytes — outgoing traffic.

The main network interface of the cluster node is automatically selected as the interface.

Note

Network statistics are collected from physical and bonding interfaces. Statistics are not collected from virtual network interfaces.

CPU

The information is taken from the /proc/stat file.

The CPU usage is calculated as follows:

(user+nive+system) / (user+nice+system+idle) * 100

View details

I/O operations

The information is collected from the /proc/diskstats file.

The usage is calculated as follows:

NumReads+NumWrites

View details

The system calculates the data from all hard drives.

RAM

The information is collected from the /proc/meminfo function.

The usage is calculated as follows:

MemUsed / MemTotal * 100

View details

System load average

The information is taken from the /proc/loadavg file.

VMmanager analyses the average value for the last 5 minutes.