On Wed, Aug 03, 2011 at 12:32:56PM -0700, Brandon High wrote:
> On Mon, Aug 1, 2011 at 4:27 PM, Daniel Carosone wrote:
> > The other thing that can cause a storm of tiny IOs is dedup, and this
> > effect can last long after space has been freed and/or dedup turned
> > off, until all the blocks cor
On Mon, Aug 1, 2011 at 4:27 PM, Daniel Carosone wrote:
> The other thing that can cause a storm of tiny IOs is dedup, and this
> effect can last long after space has been freed and/or dedup turned
> off, until all the blocks corresponding to DDT entries are rewritten.
> I wonder if this was involv
On Mon, Aug 01, 2011 at 03:10:28PM -0700, Richard Elling wrote:
> On Aug 1, 2011, at 2:16 PM, Neil Perrin wrote:
>
> > In general the blogs conclusion is correct . When file systems get full
> > there is
> > fragmentation (happens to all file systems) and for ZFS the pool uses gang
> > blocks of
On Aug 1, 2011, at 2:16 PM, Neil Perrin wrote:
> In general the blogs conclusion is correct . When file systems get full there
> is
> fragmentation (happens to all file systems) and for ZFS the pool uses gang
> blocks of smaller blocks when there are insufficient large blocks.
> However, the ZIL
On Mon, Aug 1, 2011 at 2:16 PM, Neil Perrin wrote:
> In general the blogs conclusion is correct . When file systems get full
> there is
> fragmentation (happens to all file systems) and for ZFS the pool uses gang
> blocks of smaller blocks when there are insufficient large blocks.
The blog doesn'
In general the blogs conclusion is correct . When file systems get full
there is
fragmentation (happens to all file systems) and for ZFS the pool uses gang
blocks of smaller blocks when there are insufficient large blocks.
However, the ZIL never allocates or uses gang blocks. It directly allocate
Hello,
One of my coworkers was sent the following explanation from Oracle as to
why one of backup systems was conducting a scrub so slow. I figured I
would share it with the group.
http://wildness.espix.org/index.php?post/2011/06/09/ZFS-Fragmentation-issue-examining-the-ZIL
PS: Thought it wa
