Starting and stopping record collection
By default, record collection for a particular z/VM recording service begins when the corresponding device is opened and stops when the device is closed.
About this task
You can use a device's autorecording attribute to be able to open and close a device without also starting or stopping record collection. You can use a device's recording attribute to start and stop record collection regardless of whether the device is opened or not.
You cannot start record collection if a device is open records already exist. Before you can start record collection for an open device, you must read or purge any existing records for this device.
Procedure
To be able to open a device without
starting record collection and to close a device without stopping
record collection write
0 to the device’s autorecording attribute.
To restore the automatic starting and stopping of record collection
write 1 to the device’s autorecording attribute.
Issue a command of this form: # echo <flag> > /sys/bus/iucv/drivers/vmlogrdr/<device>/autorecordinglogrec, symptom,
or account.To explicitly turn on
record collection write
1 to the device’s recording attribute.
To explicitly turn off record collection write 0 to
the device’s recording attribute. Issue a command
of this form: # echo <flag> > /sys/bus/iucv/drivers/vmlogrdr/<device>/recordingYou can read both the autorecording and the recording attribute to find the current settings.
Examples
- In this example, first the current setting of the autorecording attribute
of the logrec device is checked, then automatic recording is turned off:
# cat /sys/bus/iucv/drivers/vmlogrdr/logrec/autorecording 1 # echo 0 > /sys/bus/iucv/drivers/vmlogrdr/logrec/autorecording - In this example record collection is started explicitly and later
stopped for the account device:
To confirm whether recording is on or off, read the recording_status attribute.# echo 1 > /sys/bus/iucv/drivers/vmlogrdr/account/recording ... # echo 0 > /sys/bus/iucv/drivers/vmlogrdr/account/recording