doc/rados/ops: edit cache-tiering.rst

Add material to doc/rados/operations/cache-tiering.rst, as suggested by
Anthony D'Atri in
https://github.com/ceph/ceph/pull/63745#discussion_r2127887785.

Signed-off-by: Zac Dover <zac.dover@proton.me>

diff --git a/doc/rados/operations/cache-tiering.rst b/doc/rados/operations/cache-tiering.rst
index 762ec6454b24ca4dd9e80a342be42ae08a077ab2..ae46c3bcd5066083506d98386c869dc90dcb1fe7 100644 (file)
--- a/doc/rados/operations/cache-tiering.rst
+++ b/doc/rados/operations/cache-tiering.rst
@@ -8,7 +8,8 @@
    notice.
 
    The upstream Ceph community strongly advises against deploying new cache
-   tiers.
+   tiers. The upstream Ceph community also recommends migrating from legacy
+   deployments.
 
 A cache tier provides Ceph Clients with better I/O performance for a subset of
 the data stored in a backing storage tier. Cache tiering involves creating a