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vxvoltune(1M)

NAME

vxdmptune, vxvoltune - display and change values of VxVM and DMP tunable parameters - deprecated

SYNOPSIS

vxdmptune [-H] [dmp_parameter]

vxdmptune [-H] dmp_parameter value

vxvoltune [-H] [vxvm_parameter]

vxvoltune [-H] vxvm_parameter value

DESCRIPTION

Starting with the 6.0 release, the vxvoltune and vxdmptune utilities are deprecated. To display and change the values of Veritas Volume Manager (VxVM) tunable parameters, use the vxtune utility. To display and change the values of Dynamic Multi-Pathing (DMP) tunable parameters, use the vxdmpadm utility.

For releases prior to 6.0 release, you can use the vxvoltune utility to display and change Veritas Volume Manager (VxVM) tunable parameters, and use the vxdmptune utility to display and change the values of Dynamic Multi-Pathing (DMP) tunable parameters. If no arguments are specified, the commands display the currently defined values of all tunables that have values specified in the configuration file. If the name of a tunable parameter is specified, only its value is displayed. If a value is specified as an additional argument, this is used to update the setting in the configuration file. Any changes to this file are not applied until the system is shut down and rebooted. The changes are persistent across reboots of the system.

OPTIONS

-H Displays detailed help on the usage of the command.

EXAMPLES

Display the current value of the vol_maxkiocount VxVM parameter:

vxvoltune vol_maxkiocount

Set the value of vol_maxkiocount to 8192:


vxvoltune vol_maxkiocount 8192

FILES

/etc/vx/vxdmp_tunables Configuration file for DMP tunables.
/etc/vx/vxvm_tunables Configuration file for VxVM tunables.

NOTES

The following tunables may be set using vxdmptune:
dmp_enable_restore_daemon
dmp_failed_io_threshold
dmp_pathshitch_blks_shift
dmp_restore_daemon_cycles
dmp_restore_daemon_interval
dmp_restore_daemon_policy
dmp_retry_count
 

The following tunables may be set using vxvoltune:
maxiosize
vol_checkpt_default
vol_default_iodelay
vol_fmr_logsz
vol_max_nmpool_sz
vol_max_rdback_sz
vol_max_wrspool_sz
vol_max_volumes
vol_maxioctl
vol_maxkiocount
vol_maxparallelio
vol_min_lowmem_sz
vol_rvio_maxpool_sz
volcvm_smartsync
voldrl_max_drtregs
voldrl_max_seq_dirty
voldrl_min_regionsz
voliomem_chunk_size
voliomem_maxpool_sz
voliot_errbuf_dflt
voliot_iobuf_default
voliot_iobuf_limit
voliot_iobuf_max
voliot_max_open
volpagemod_max_memsz
volraid_minpool_size
 

SEE ALSO

vxintro(1M)

See the Storage Foundation Administrator’s Guide


VxVM 7.3.1 vxvoltune(1M)