You can improve I/O performance on Red Hat Enterprise Linux 6 and 7 by using the tuned-admcommand in the enterprise-storage profile. You can use the virtual-guest profile for Red Hat Enterprise Linux as a guest virtual machine. Using these settings can result in marked improvement in throughput and latency on clustered Data ONTAP.
The man page for the tuned-adm command contains syntax, default value, and other usage.
Current active profile: default Service tuned: enabled, running Service ktune: enabled, running
Stopping tuned: [ OK ] Switching to profile 'enterprise-storage' Applying deadline elevator: dm-0 dm-1 dm-2 dm-3 sda sdb sdc[ OK ] sdf sdg sdh sdi sdj sdk Applying ktune sysctl settings: /etc/ktune.d/tunedadm.conf: [ OK ] Calling '/etc/ktune.d/tunedadm.sh start': [ OK ] Applying sysctl settings from /etc/sysctl.conf Starting tuned: [ OK ]
Current active profile: enterprise-storage Service tuned: enabled, running Service ktune: enabled, running