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Use raw disk for Apache Trafficserver in Centos 7

I want to use raw disk for my Trafficserver 5.1.0. I've created a partition at /dev/sda5 and in order to allow trafficserver to use the disk, please follow these steps.

1) Edit/create a file in /etc/udev/rules.d . I named it 50-ats.rules
eg. vi /etc/udev/rules.d/50-ats.rules

2) Add these text.
SUBSYSTEM=="block", KERNEL=="sda5", GROUP:="trafficserver", OWNER:="nobody"

note :
- sda5 is the disk/partition I want to use with trafficserver.
- OWNER:="nobody" is the default owner when you compile trafficserver.



3)  Reboot your server then verify the disk cache is working by checking in the /usr/local/var/log/trafficserver/diags.log file and look for "cache enabled" meaning your disk cache is working. Or you can run tstop or traffic_top and you can see the "Disk Total" is the size of your disk cache.

Good luck trying.

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