[PATCH 2/2] NEWS: mention zero detection for non-shared-storage migration

Peter Krempa posted 2 patches 1 year, 3 months ago
[PATCH 2/2] NEWS: mention zero detection for non-shared-storage migration
Posted by Peter Krempa 1 year, 3 months ago
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
---
 NEWS.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/NEWS.rst b/NEWS.rst
index 7f4f33c8f8..7a4a0e1d1f 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -17,6 +17,17 @@ v10.9.0 (unreleased)

 * **New features**

+  * qemu: zero block detection for non-shared-storage migration
+
+    Users can now request that all-zero blocks are not transferred when migrating
+    non-shared disk data without actually enabling zero detection on the disk
+    itself. This allows sparsifying images during migration where the source
+    has no access to the allocation state of blocks at the cost of CPU overhead.
+
+    This feature is avaliable via the ``--migrate-disks-detect-zeroes`` option
+    for ``virsh migrate`` or ``VIR_MIGRATE_PARAM_MIGRATE_DISKS_DETECT_ZEROES_ZEROES``
+    migration parameter. See the documentation for caveats.
+
 * **Improvements**

   * qemu: internal snapshot improvements
-- 
2.47.0
Re: [PATCH 2/2] NEWS: mention zero detection for non-shared-storage migration
Posted by Ján Tomko 1 year, 3 months ago
On a Thursday in 2024, Peter Krempa wrote:
>Signed-off-by: Peter Krempa <pkrempa@redhat.com>
>---
> NEWS.rst | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
>diff --git a/NEWS.rst b/NEWS.rst
>index 7f4f33c8f8..7a4a0e1d1f 100644
>--- a/NEWS.rst
>+++ b/NEWS.rst
>@@ -17,6 +17,17 @@ v10.9.0 (unreleased)
>
> * **New features**
>
>+  * qemu: zero block detection for non-shared-storage migration
>+
>+    Users can now request that all-zero blocks are not transferred when migrating
>+    non-shared disk data without actually enabling zero detection on the disk
>+    itself. This allows sparsifying images during migration where the source
>+    has no access to the allocation state of blocks at the cost of CPU overhead.
>+
>+    This feature is avaliable via the ``--migrate-disks-detect-zeroes`` option

*available

Jano

>+    for ``virsh migrate`` or ``VIR_MIGRATE_PARAM_MIGRATE_DISKS_DETECT_ZEROES_ZEROES``
>+    migration parameter. See the documentation for caveats.
>+
> * **Improvements**
>
>   * qemu: internal snapshot improvements
>-- 
>2.47.0
>