How do I turn off write cache in Linux? More specifically, SUSE 11?
My problem is that heavy I/O kills the system even if the generating process is a user priority class, and the starved processes are RR/RT class. So my high availability system breaks with lots of timeouts.
/ 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.