Anton & Roch, Thank you for helping me understand this. I didn't want to make too many assumptions that were unfounded and then incorrectly relay that information back to clients.
So if I might just repeat your statements, so my slow mind is sure it understands, and Roch, yes your assumption is correct that I am referencing File System Cache, not disk cache. A. Copy-on-write exists solely to ensure on disk data integrity, and as Anton pointed out it is completely different than DirectIO. b. ZFS still avail's itself of a file system cache, and therefore, it is possible that data can be lost if it hasn't been written to disk and the server fails. c. The write throttling issue is known, and being looked at - when it is fixed we don't know? I'll add myself to the notification list as an interested party :) Now to another question related to Anton's post. You mention that directIO does not exist in ZFS at this point. Are their plan's to support DirectIO; any functionality that will simulate directIO or some other non-caching ability suitable for critical systems such as databases if the client still wanted to deploy on filesystems. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
