On Jul 29, 2012, at 7:07 AM, Jim Klimov wrote:
> Hello, list
> For several times now I've seen statements on this list implying
> that a dedicated ZIL/SLOG device catching sync writes for the log,
> also allows for more streamlined writes to the pool during normal
> healthy TXG syncs, than is the case with the default ZIL located
> within the pool.
I'm not sure where you are heading here. Space for the data in the
pool is allocated based on the policies of the pool.
> Is this understanding correct? Does it apply to any generic writes,
> or only to sync-heavy scenarios like databases or NFS servers?
Async writes don't use the ZIL.
ZFS Performance and Training
zfs-discuss mailing list