How do I turn off write cache in Linux? More specifically, SUSE 11?
My problem is that heavy IO kills the system even if the generating process is user priority class, and the starved processes are RR/RT class. So my high availability system breaks with lots of timeouts.
I have / mounted on a flash drive, and a few mount points looking into a RAID controller. For the RAID, I want to try to turn the cache off, since it has a cache inside. But if it needs to be system-wide, fine.
So far I used sync option to mount, but it's not quite like turning off the cache.