Re: Md cache?

On Wednesday June 2, linuxboy123@mindspring.com wrote:

to all,

Is anyone aware of a way to cause the md devices to use some system memory as a write cache? (maybe through mdadm?).  I have looked everywhere and cannot seem to find anything about such a feature.

If not, anyone  know if this is a possibility for the future, Neil?

What is it exactly that you want.

All device IO is cached in memory before being written to the device.
The only real value of a cache with a RAID array is if it we a
non-volatile cache.  Is that what you were thinking of.

NeilBrown