So it's hardware and not the Unix cache/buffers that keep things in RAM to improve performance.
Thank you for clarifying! On Wed, Feb 4, 2015 at 3:59 PM, Wietse Venema <wie...@porcupine.org> wrote: > Andrew Bourgeois: > > But what does "persistent write cache" mean? What needs to be changed on > > the OS level? Google doesn't clearly link "persistent write cache" to a > > Linux feature. > > It is a hardware feature found in RAID controllers and in server > I/O accelerators. The basic idea is to serialize random writes. > SSHD disks may provide similar improvements with random I/O. > > Wietse >
