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From: Friedrich Weber <f.weber@proxmox.com>
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Subject: [pve-devel] [PATCH docs 2/2] storage: rbd: document KRBD map
options property
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Describe the new `krbd-map-options` property, and mention under which
circumstances the `rxbounce` option may be necessary.
Signed-off-by: Friedrich Weber <f.weber@proxmox.com>
---
pve-storage-rbd.adoc | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/pve-storage-rbd.adoc b/pve-storage-rbd.adoc
index 5fe558a..71fbc02 100644
--- a/pve-storage-rbd.adoc
+++ b/pve-storage-rbd.adoc
@@ -56,6 +56,16 @@ Enforce access to rados block devices through the krbd kernel module. Optional.
NOTE: Containers will use `krbd` independent of the option value.
+krbd-map-options::
+
+Comma-separated list of additional map options for KRBD, see the Ceph docs.
+footnote:[Kernel RBD (KRBD) options
+{cephdocs-url}/man/8/rbd/#kernel-rbd-krbd-options] Optional.
++
+Currently, only the `rxbounce` option is supported. In case the pool hosts
+Windows VM disks, setting `rxbounce` can be necessary to avoid performance
+degradation and `bad crc/signature` warnings in the host journal.
+
.Configuration Example for a external Ceph cluster (`/etc/pve/storage.cfg`)
----
rbd: ceph-external
--
2.39.5
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