On Fri, Apr 16 at 10:05, Bob Friesenhahn wrote:
It is much more efficient (from a housekeeping perspective) if filesystem sectors map directly to SSD pages, but we are not there yet.
How would you stripe or manage a dataset across a mix of devices with different geometries? That would break many of the assumptions made by filesystems today. I would argue it's easier to let the device virtualize this mapping and present a consistent interface, regardless of the underlying geometry.
As a devil's advocate, I am still waiting for someone to post a URL to a serious study which proves the long-term performance advantages of TRIM.
I am absolutely sure these studies exist, but as to some entity publishing a long term analysis that cost real money (many thousands of dollars) to create, I have no idea if data like that exists in the public domain where anyone can see it. I can virtually guarantee every storage, SSD and OS vendor is generating that data internally however. --eric -- Eric D. Mudama edmud...@mail.bounceswoosh.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
