Hi Eric and all,
Eric Schrock wrote:
On Nov 3, 2009, at 6:01 AM, Jürgen Keil wrote:
I think I'm observing the same (with changeset 10936) ...
# mkfile 2g /var/tmp/tank.img
# zpool create tank /var/tmp/tank.img
# zfs set dedup=on tank
# zfs create tank/foobar
This has to do
Hi,
It looks interesting problem.
Would it help if as ZFS detects dedup blocks, it can start increasing
effective size of pool.
It will create an anomaly with respect to total disk space, but it will
still be accurate from each file system usage point of view.
Basically, dedup is at block
Well, then you could have more logical space than physical space, and that
would be extremely cool, but what happens if for some reason you wanted to turn
off dedup on one of the filesystems? It might exhaust all the pool's space to
do this. I think good idea would be another
On Tue, November 3, 2009 10:32, Bartlomiej Pelc wrote:
Well, then you could have more logical space than physical space, and
that would be extremely cool, but what happens if for some reason you
wanted to turn off dedup on one of the filesystems? It might exhaust all
the pool's space to do
Well, then you could have more logical space than physical space
Reconsidering my own question again, it seems to me that the question of space
management is probably more fundamental than I had initially thought, and I
assume members of the core team will have thought through much of it.
I
But: Isn't there an implicit expectation for a space guarantee associated
with a
dataset? In other words, if a dataset has 1GB of data, isn't it natural to
expect to be able to overwrite that space with other
data?
Is there such a space guarantee for compressed or cloned zfs?
--
This
On Tue, Nov 3, 2009 at 10:54 PM, Nils Goroll sl...@schokola.de wrote:
Now to the more general question: If all datasets of a pool contained the
same data and got de-duped, the sums of their used space still seems to be
limited by the locical pool size, as we've seen in examples given by
Jürgen
On Tue, November 3, 2009 16:36, Nils Goroll wrote:
No point in trying to preserve a naive mental model that
simply can't stand up to reality.
I kind of dislike the idea to talk about naiveness here.
Maybe it was a poor choice of words; I mean something more along the lines
of simplistic.
Well, then you could have more logical space than
physical space, and that would be extremely cool,
I think we already have that, with zfs clones.
I often clone a zfs onnv workspace, and everything
is deduped between zfs parent snapshot and clone
filesystem. The clone (initially) needs no
On Tue, November 3, 2009 15:06, Cyril Plisko wrote:
On Tue, Nov 3, 2009 at 10:54 PM, Nils Goroll sl...@schokola.de wrote:
But: Isn't there an implicit expectation for a space guarantee
associated
with a dataset? In other words, if a dataset has 1GB of data, isn't it
natural to expect to be
Hi David,
simply can't stand up to reality.
I kind of dislike the idea to talk about naiveness here.
Maybe it was a poor choice of words; I mean something more along the lines
of simplistic. The point is, space is no longer as simple a concept
as it was 40 years ago. Even without
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