All DMP 5.0 tuning can be done online as long as all tuning is performed using the vxdmpadm set-tune command. The set of tunables that can be configured online in DMP 5.0 MP1 are:
# vxdmpadm gettune all
Tunable Current Value Default Value
------------------------------ -------------
dmp_failed_io_threshold 57600 57600
dmp_retry_count 5 5
dmp_pathswitch_blks_shift 11 11
dmp_queue_depth 32 32
dmp_cache_open on on
dmp_daemon_count 10 10
dmp_scsi_timeout 30 30
dmp_delayq_interval 15 15
dmp_path_age 300 300
dmp_stat_interval 1 1
dmp_health_time 60 60
dmp_probe_idle_lun on on
dmp_log_level 1 1
dmp_retry_timeout 0 0
dmp_fast_recovery on on
參考文件：
Veritas Storage Foundation™ 5.0 Dynamic Multi-pathing
Optimizing Availability and Performance in Multi-Vendor Environments
May 2007
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