Ah, I now understand that this problem is mindbogglingly complex because
of tons and tons of work needed to make it work, including the storage
format on the SSD cache, and tools for "fsck":ing it etc etc. In a way
that maybe answered my question, thanks!
On 2016-01-31 19:00, Tinker wrote:
If there is nothing like this implemented in software in OpenBSD,
* If someone implemented it, would there be interest to actually
include the patch in OpenBSD?
* Could a direct personal donation (separate from the normal
donations to the OpenBSD project) to a developer be of use for making
this happen, if so how big a donation, of what value would USD 1,000
be in proportion?
Not sure right now but next 12 months I could consider this, if you
have any ideas about who feel free to respond or PM or anything you
like.
On 2016-01-31 16:16, Tinker wrote:
This could be made in software with benefit, as a Softraid patch.
So the frequently accessed stuff ends up cached on the SSD for faster
read speed.
ZFS on FreeBSD etc. does it in its "ARC"/"ARC2L" feature?
There is some hardware solution, e.g. Intel made the
http://ark.intel.com/products/70029/Intel-RAID-SSD-Cache-Controller-RCS25ZB040LX
using the "Nytro MegaRAID" chip.
Someone would need to port its driver to OpenBSD.
Also in the past there was a "Adaptec MaxIQ". Those are the only two
"Raid controller cache" hardware solutions I am aware of, do you know
any more?
(Was not sure if this belonged on tech@ or misc@, any clarification
for me to never more crosspost please let me know)
