Section: ndctl Manual (1)
Updated: 2020-03-24
Page Index


ndctl-monitor - Monitor the smart events of nvdimm objects  


ndctl monitor [<options>]



Ndctl monitor is used for monitoring the smart events of nvdimm objects and dumping the json format notifications to syslog, standard output or a logfile.

The objects to monitor and smart events to notify can be selected by setting options and/or the configuration file at /etc/ndctl/monitor.conf

Both, the values in configuration file and in options will work. If there is a conflict, the values in options will override the values in the configuration file. Any updated values in the configuration file will take effect only after the monitor process is restarted.  


Run a monitor as a daemon to monitor DIMMs on bus "nfit_test.1"

ndctl monitor --bus=nfit_test.1 --daemon

Run a monitor as a one-shot command and output the notifications to /var/log/ndctl.log

ndctl monitor --log=/var/log/ndctl.log

Run a monitor daemon as a system service

systemctl start ndctl-monitor.service



-b, --bus=

Enforce that the operation only be carried on devices that are attached to the given bus. Where bus can be a provider name or a bus id number.

-d, --dimm=

A nmemX device name, or dimm id number. Select the devices to monitor reference the given dimm.

-r, --region=

A regionX device name, or a region id number. The keyword all can be specified to carry out the operation on every region in the system, optionally filtered by bus id (see --bus= option).

-n, --namespace=

A namespaceX.Y device name, or namespace region plus id tuple X.Y.

-l, --log=

Send log messages to the specified destination.

• "<file>": Send log messages to specified <file>. When fopen() is not able to open <file>, log messages will be forwarded to syslog.

• "syslog": Send messages to syslog.

• "standard": Send messages to standard output.

The default log destination is syslog if "--daemon" is specified, otherwise standard. Note that standard and relative path for <file> will not work if "--daemon" is specified.

-c, --config-file=

Provide the config file to use. This overrides the default config typically found in /etc/ndctl


Run a monitor as a daemon.

-D, --dimm-event=

Name of an smart health event from the following:

• "dimm-spares-remaining": Spare Blocks Remaining value has gone below the pre-programmed threshold.

• "dimm-media-temperature": NVDIMM Media temperature value has gone above the pre-programmed threshold.

• "dimm-controller-temperature": NVDIMM Controller temperature value has gone above the pre-programmed threshold.

• "dimm-health-state": NVDIMM Normal Health Status has changed

• "dimm-unclean-shutdown": NVDIMM Last Shutdown Status was a unclean shutdown.

The monitor will attempt to enable the alarm control bits for all specified events.

-u, --human

Output monitor notification as human friendly json format instead of the default machine friendly json format.

-v, --verbose

Emit extra debug messages to log.


Copyright (c) 2018, FUJITSU LIMITED. License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.  


ndctl-list(1), ndctl-inject-smart(1)



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