Jan,
I'm not sure that turning dedup or compression on is useful in your
particular situation.
Since the images are already compressed, re-compressing them only adds
cpu overhead without much benefit. Also, Since images will have little
opportunity for dedup (unless you tend to have multiple and exact
copies) it just wastes cpu cycles and uses up lots of memory. Unless
there is some other data you expect to offset the compressibility and
replication of images, I wouldn't bother with these options.
Gary
On 1/30/12 11:01 AM, Jan Owoc wrote:
Thank you for the replies.
On Sun, Jan 29, 2012 at 11:33 PM, Sašo Kiselkov<skiselkov...@gmail.com> wrote:
The obvious saying springs to mind: "RAID != backup". If you need your
data to be safe, have two copies of it in two geographically separate
locations running in two separate machines.
I've read about ECC/non-ECC and RAID != backup and already decided on
a solution - I wanted some indication of the stability of the ZFS
features themselves. My question arose when I read that
"dedup=fletcher4,verify" was causing problems [1] and was removed. I
was looking for indications whether choosing "checksum=sha256,
compression=on, dedup=verify" in itself was asking for trouble.
[1] http://mail.opensolaris.org/pipermail/zfs-discuss/2009-November/034106.html
On Sun, Jan 29, 2012 at 10:38 PM, Robbie Crash
<sardonic.smi...@gmail.com> wrote:
Those features are thoroughly tested and not experimental. That said:
nothing is guaranteed to keep your data safe, and if you're truly worried
about it, don't use dedupe.
Because photos tend to be already compressed, and I have only ~5%
duplicates, I will probably only change "checksum=sha256" from its
default. Other than CPU time, is there any other reason I may want to
stick with the default of "checksum=on" (fletcher4)?
Once again, thank you for the insight,
Jan
_______________________________________________
OpenIndiana-discuss mailing list
OpenIndiana-discuss@openindiana.org
http://openindiana.org/mailman/listinfo/openindiana-discuss
_______________________________________________
OpenIndiana-discuss mailing list
OpenIndiana-discuss@openindiana.org
http://openindiana.org/mailman/listinfo/openindiana-discuss
