[illumos-Discuss] Heads up: iSCSI UNMAP support
garrett at damore.org
Sun Mar 6 18:00:07 PST 2011
On Sun, 2011-03-06 at 23:59 +0100, Joerg Goltermann wrote:
> Hi Dan,
> On 05.03.2011 00:21, Dan McDonald wrote:
> > The Illumos gate now has support for the UNMAP operation for iSCSI if the backing store is a ZFS zvol (raw/character device). If your filesystem supports UNMAP (e.g. -o discrard with Linux EXT4), you'll see space reclamation on the zvol.
> good job, is WRITE_SAME functional too? I saw some bits in the
> commit, but I'm not sure about it.
> - Joerg
Only when given the UNMAP bit. We have WRITE SAME work in progress, so
stay tuned for the rest of that particular functionality, as well as
associated functionality designed mostly around v12n.
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