So it sounds like DSS doesn't use system RAM for read caching in the way that ZFS does for example. The problem with depending on RAID controller cache is these are usually quite small, 1GB or less and not expandable. With RAM being fairly cheap at the moment and with massively faster access times than even SSDs, adding this would allow substantial improvements in random read accesses to hot data at a relatively low cost.

Have you any plans to add this to the development road-map?

Thanks,

Tim