Tony:
> 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 t
Tony Galway writes:
> 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
> unders
On Apr 20, 2007, at 10:47 AM, Anton B. Rang wrote:
ZFS uses caching heavily as well; much more so, in fact, than UFS.
Copy-on-write and direct i/o are not related. As you say, data gets
written first, then the metadata which points to it, but this isn't
anything like direct I/O. In particu
Tony Galway writes:
> Let me elaborate slightly on the reason I ask these questions.
>
> I am performing some simple benchmarking, and during this a file is
> created by sequentially writing 64k blocks until the 100Gb file is
> created. I am seeing, and this is the exact same as VxFS, large p
ZFS uses caching heavily as well; much more so, in fact, than UFS.
Copy-on-write and direct i/o are not related. As you say, data gets written
first, then the metadata which points to it, but this isn't anything like
direct I/O. In particular, direct I/O avoids caching the data, instead
transfe
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 i
Let me elaborate slightly on the reason I ask these questions.
I am performing some simple benchmarking, and during this a file is created by
sequentially writing 64k blocks until the 100Gb file is created. I am seeing,
and this is the exact same as VxFS, large pauses while the system reclaims t
