Jim Dunham wrote:
Unlike UFS filesystems and lockfs -f, or lockfs -w, there is no 'supported' way to get ZFS to empty the ZIL to disk on demand. So even though one will get both ZFS and application filesystem consistency within the SNDR secondary volume, there can be many seconds worth of lost data, since SNDR can't replicate what it does not see.
If the application depends on that then it should be using O_DSYNC - if it isn't then it is broken. In which case the ZIL is on disk and SNDR should be replicating that too (either because the dataset ZIL is in pool or because the slog device is part of the SNDR consistency group as well).
-- Darren J Moffat _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
