Netapp and patents
Posted Jun 22, 2007 7:10 UTC (Fri) by anton
In reply to: okay but,
Parent article: Linus on GPLv3 and ZFS
I suppose NetApp has patents too, but perhaps Linus wishes
to imply that they would be more tractable to deal with than Sun
Yes, Netapp has
, and they caused Daniel Phillips to stop
working on the tux2 filesystem
; I have not followed the story
enough to know if Netapp did anything other than file the patents to
achieve this result.
Netapp's WAFL is not very interesting for Linux anyway, because it
requires special NVRAM hardware to buffer writes during some of the
more time-consuming operations (e.g., snapshot creation). I don't
think that this hardware dependence can be eliminated without major
changes to the WAFL code.
Concerning not breaking Sun patents, you can look for older sources
where similar ideas have been described, e.g., various papers on
log-structured file systems, e.g., our
Freenix 2000 paper, or (maybe too young) my
file system ideas.
to post comments)