Forcing ZFS to flush/sync data to disks sooner

[steeldomejeff]

0.8.3-1ubuntu12.13

I want to know if it's possible to force ZFS to flush/sync data to the backing disks sooner than what I'm seeing. No matter what I do with the ZFS config, ZFS appears to take between 60-90 seconds to commit new data to the disks.

I have modified the following settings with apparently no effect:

--- ZFS options ---
zfs_txg_timeout
zfs_commit_timeout_pct

--- ZPOOL settings ---
sync=always (with an SLOG device)

I don't mind if it takes a few seconds, but I don't want 60+ seconds before ZFS begins to commit data. Any help here is greatly appreciated.

[steeldomejeff]

Figured it out... it was an intermediate caching process that was obscuring the results. All good now.