Displaying 1 result from an estimated 1 matches for "writebarrieronoff".
2013 Nov 04
1
extremely slow NFS performance under 6.x [SOLVED]
...ervers on 5.
What he found was the mount option barrier. According to one or two hits I
found, googling, it's not clear that 5.x even recognizes this option. From
upstream docs,
<https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/writebarrieronoff.html>,
it's enabled by default, and affects *all* journalled filesystems.
Remounting the drive with -o nobarrier, I just NFS mounted an exported
directory... and it took 20 seconds.
Since most of our systems are all on UPSes, we're not worried about sudden
power loss... and my manager...